criyle/codenet-compile-errors huggingface dataset:
Language: C++

#include <iostream>
#include <algorithm>
#include <string>
#include <regex>
using namespace std;

int main()
{
	int N,A[100010];
	cin >> N;
	for (int i = 0; i < N; i++)cin >> A[i];
	int d = 0;
	for (int i = 0; i < N - 1; i++) {
		while (A[i] > 0 && A[i + 1] > 0) {
			d++;
			A[i]--;
			A[i + 1]--;
		}
	}
	for (int i = 0; i < N; i++) {
		d += A[i] / 2;
	}
	cout << d << endl;


Compiler output:
a.cc: In function 'int main()':
a.cc:23:27: error: expected '}' at end of input
   23 |         cout << d << endl;
      |                           ^
a.cc:8:1: note: to match this '{'
    8 | {
      | ^
Language: C++

#include <bits/stdc++.h>

using namespace std;
typedef long longll;

int main()
{
	int n;
	cin >> n;
	ll res = 0;
	ll keep = 0;
	for(int i=0; i<n; i++)
	{
		ll a;
		cin >> a;
		if(keep==1 && a>0)
		{
			res++;
			a--;
		}
		res+= a / 2;
		keep = a % 2;
	}
	cout << res << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'll' was not declared in this scope
   10 |         ll res = 0;
      |         ^~
a.cc:11:11: error: expected ';' before 'keep'
   11 |         ll keep = 0;
      |           ^~~~~
      |           ;
a.cc:14:19: error: expected ';' before 'a'
   14 |                 ll a;
      |                   ^~
      |                   ;
a.cc:15:24: error: 'a' was not declared in this scope
   15 |                 cin >> a;
      |                        ^
a.cc:16:20: error: 'keep' was not declared in this scope
   16 |                 if(keep==1 && a>0)
      |                    ^~~~
a.cc:18:25: error: 'res' was not declared in this scope
   18 |                         res++;
      |                         ^~~
a.cc:21:17: error: 'res' was not declared in this scope
   21 |                 res+= a / 2;
      |                 ^~~
a.cc:22:17: error: 'keep' was not declared in this scope
   22 |                 keep = a % 2;
      |                 ^~~~
a.cc:24:17: error: 'res' was not declared in this scope
   24 |         cout << res << endl;
      |                 ^~~
Language: C++

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		new Main().solve();
	}
	
	void solve(){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		int[]a=new int[n];
		for(int i=0;i<n;i++)a[i]=sc.nextInt();
		int pair_count=0;
		for(int i=0;i<n;i++){
			if(a[i]%2==0){
				pair_count+=a[i]/2-1;
				a[i]=2;
			}else{
				pair_count+=a[i]/2;
				a[i]=a[i]%2;
			}
		}
		for(int i=0;i<n-2;i++){
			if(a[i]==1 && a[i+1]==2 && a[i+2]==1){
				pair_count+=2;
				a[i]=a[i+1]=a[i+2]=0;
			}
		}
		for(int i=0;i<n;i++){
			if(a[i]==2)pair_count++;
		}
		System.out.println(pair_count);
		
	}

}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.Scanner;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: expected unqualified-id before 'public'
    3 | public class Main {
      | ^~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{	
	long long t=0,c=0;
	int n,i,k;
	cin>>n;
	for(i=0,i<n;i++) {
		cin>>k;
		if(k==0)
		{
			t+=c/2;
			c=0;
		}
		c+=k;
	}
	t+=c/2;
	cout<<t<<endl;
 	return 0;
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:8:24: error: expected ';' before ')' token
    8 |         for(i=0,i<n;i++) {
      |                        ^
      |                        ;
Language: C++

# include <stdio.h>
# include <string.h>
# include <stdlib.h>
# include <queue>
# include <stack>
# include <map>
# include <math.h>
# include <algorithm>
using namespace std;
# define MAXN 55
# define MAXM 100005
# define INF 1000000000
# define MIN(a,b) (a)>(b)?(b):(a)
# define MAX(a,b) (a)<(b)?(b):(a)
# define mem(a,b) memset(a,b,sizeof(a))
# define FOR(i,a,n) for(int i=a; i<=n; ++i)
# define FO(i,a,n) for(int i=a; i<n; ++i)
# define bug puts("H");
typedef __int64 LL;
int _MAX(int a, int b){return a>b?a:b;}
int _MIN(int a, int b){return a>b?b:a;}

int a[100005];

int main()
{
    int n;
    LL ans=0;
    scanf("%d",&n);
    FO(i,0,n) scanf("%d",a+i), ans+=a[i]/2, a[i]%=2;
    FO(i,1,n) {
        if (a[i]>0&&a[i-1]>0) ans+=MIN(a[i],a[i-1]), a[i]-=MIN(a[i],a[i-1]);
    }
    printf("%I64d\n",ans);
    return 0;
}


Compiler output:
a.cc:19:9: error: '__int64' does not name a type; did you mean '__int64_t'?
   19 | typedef __int64 LL;
      |         ^~~~~~~
      |         __int64_t
a.cc: In function 'int main()':
a.cc:28:5: error: 'LL' was not declared in this scope
   28 |     LL ans=0;
      |     ^~
a.cc:30:32: error: 'ans' was not declared in this scope; did you mean 'abs'?
   30 |     FO(i,0,n) scanf("%d",a+i), ans+=a[i]/2, a[i]%=2;
      |                                ^~~
      |                                abs
a.cc:32:31: error: 'ans' was not declared in this scope; did you mean 'abs'?
   32 |         if (a[i]>0&&a[i-1]>0) ans+=MIN(a[i],a[i-1]), a[i]-=MIN(a[i],a[i-1]);
      |                               ^~~
      |                               abs
a.cc:34:22: error: 'ans' was not declared in this scope; did you mean 'abs'?
   34 |     printf("%I64d\n",ans);
      |                      ^~~
      |                      abs
Language: C++

#include <bits/stdc++.h>
using namespace std;

const int MAX_N = 100000;
const int INF = 1e9;

#define int long long;

int n;
int a[MAX_N+10];


signed main(){
  cin>>n;
  for(int i=1;i<=n;i++)cin>>a[i];

  int ans=0;
  for(int i=1;i<=n;i++){
    ans+=a[i]/2;
    a[i]%=2;
    if(a[i]==1 && a[i+1]!=0 && i!=n){
      a[i+1]--;
      ans++;
    }
  }
  cout<<ans<<endl;
  return 0;
}


Compiler output:
a.cc:7:18: error: declaration does not declare anything [-fpermissive]
    7 | #define int long long;
      |                  ^~~~
a.cc:9:1: note: in expansion of macro 'int'
    9 | int n;
      | ^~~
a.cc:9:5: error: 'n' does not name a type
    9 | int n;
      |     ^
a.cc:7:18: error: declaration does not declare anything [-fpermissive]
    7 | #define int long long;
      |                  ^~~~
a.cc:10:1: note: in expansion of macro 'int'
   10 | int a[MAX_N+10];
      | ^~~
a.cc:10:5: error: 'a' does not name a type
   10 | int a[MAX_N+10];
      |     ^
a.cc: In function 'int main()':
a.cc:14:8: error: 'n' was not declared in this scope; did you mean 'yn'?
   14 |   cin>>n;
      |        ^
      |        yn
a.cc:7:18: error: declaration does not declare anything [-fpermissive]
    7 | #define int long long;
      |                  ^~~~
a.cc:15:7: note: in expansion of macro 'int'
   15 |   for(int i=1;i<=n;i++)cin>>a[i];
      |       ^~~
a.cc:15:11: error: 'i' was not declared in this scope
   15 |   for(int i=1;i<=n;i++)cin>>a[i];
      |           ^
a.cc:15:19: error: expected ')' before ';' token
   15 |   for(int i=1;i<=n;i++)cin>>a[i];
      |      ~            ^
      |                   )
a.cc:15:20: error: 'i' was not declared in this scope
   15 |   for(int i=1;i<=n;i++)cin>>a[i];
      |                    ^
a.cc:7:18: error: declaration does not declare anything [-fpermissive]
    7 | #define int long long;
      |                  ^~~~
a.cc:17:3: note: in expansion of macro 'int'
   17 |   int ans=0;
      |   ^~~
a.cc:17:7: error: 'ans' was not declared in this scope; did you mean 'abs'?
   17 |   int ans=0;
      |       ^~~
      |       abs
a.cc:7:18: error: declaration does not declare anything [-fpermissive]
    7 | #define int long long;
      |                  ^~~~
a.cc:18:7: note: in expansion of macro 'int'
   18 |   for(int i=1;i<=n;i++){
      |       ^~~
a.cc:18:19: error: expected ')' before ';' token
   18 |   for(int i=1;i<=n;i++){
      |      ~            ^
      |                   )
Language: C++

#include <stdio.h>

int main(void){
    int i,n,s=0;
    scanf("%d",&n);
    int a[n];
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
    }

    for(i=0;i<n;i++){
        if(a[i]%2==0){
            s+=a[i]/2;
        }
        else if(a[i]%2==1){
            s+=(a[i]-1)/2;
            if(a[i+1]>=1&&i+1<n){
                s+=1;
                a[i+1]-=1;
            }
        }
    }
    printf("%d\n",s);
    return 0;
}#include <stdio.h>

int main(void){
    int i,n,s=0;
    scanf("%d",&n);
    int a[n];
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
    }

    for(i=0;i<n;i++){
        if(a[i]%2==0){
            s+=a[i]/2;
        }
        else if(a[i]%2==1){
            s+=(a[i]-1)/2;
            if(a[i+1]>=1&&i+1<n){
                s+=1;
                a[i+1]-=1;
            }
        }
    }
    printf("%d\n",s);
    return 0;
}

Compiler output:
a.cc:25:2: error: stray '#' in program
   25 | }#include <stdio.h>
      |  ^
a.cc:25:3: error: 'include' does not name a type
   25 | }#include <stdio.h>
      |   ^~~~~~~
Language: Java

public class Main {
	void run() {
		Scanner sc = new Scanner(System.in);

		int n = sc.nextInt();
		int[] a = new int[n + 1];
		for (int i = 0; i < n; i++) {
			a[i] = sc.nextInt();
		}

		long sum = 0;
		for (int i = 0; i < n; i++) {
			sum += a[i] / 2;
			a[i] %= 2;
			if (0 < a[i] && 0 < a[i + 1]) {
				sum++;
				a[i]--;
				a[i + 1]--;
			}
		}
		System.out.println(sum);
	}

	public static void main(String[] args) {
		new Main().run();
	}
}


Compiler output:
Main.java:3: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:3: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: Java

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;

import java.util.*;

public class Main {
	int N;
	int[] A;
	public void solve() {
		N = nextInt();
		A = new int[N];
		for(int i = 0;i < N;i++){
			A[i] = nextInt();
		}
		long ans = 0;
		
		for(int i = 0;i < N - 1;i++){
			int min = Math.min(A[i],A[i + 1]);
			if(min != 0){
				ans += min;
				A[i] -= min;
				A[i + 1] -= min;
			}
			
			ans += A[i] / 2;
		}
		
		ans += A[N - 1] / 2;
		out.println(ans9);
	}
 
	public static void main(String[] args) {
		out.flush();
		new Main().solve();
		out.close();
	}
 
	/* Input */
	private static final InputStream in = System.in;
	private static final PrintWriter out = new PrintWriter(System.out);
	private final byte[] buffer = new byte[2048];
	private int p = 0;
	private int buflen = 0;
 
	private boolean hasNextByte() {
		if (p < buflen)
			return true;
		p = 0;
		try {
			buflen = in.read(buffer);
		} catch (IOException e) {
			e.printStackTrace();
		}
		if (buflen <= 0)
			return false;
		return true;
	}
 
	public boolean hasNext() {
		while (hasNextByte() && !isPrint(buffer[p])) {
			p++;
		}
		return hasNextByte();
	}
 
	private boolean isPrint(int ch) {
		if (ch >= '!' && ch <= '~')
			return true;
		return false;
	}
 
	private int nextByte() {
		if (!hasNextByte())
			return -1;
		return buffer[p++];
	}
 
	public String next() {
		if (!hasNext())
			throw new NoSuchElementException();
		StringBuilder sb = new StringBuilder();
		int b = -1;
		while (isPrint((b = nextByte()))) {
			sb.appendCodePoint(b);
		}
		return sb.toString();
	}
 
	public int nextInt() {
		return Integer.parseInt(next());
	}
 
	public long nextLong() {
		return Long.parseLong(next());
	}
 
	public double nextDouble() {
		return Double.parseDouble(next());
	}
}

Compiler output:
Main.java:30: error: cannot find symbol
		out.println(ans9);
		            ^
  symbol:   variable ans9
  location: class Main
1 error
Language: C

#include <stdio.h>

int n, data[100001], tmp;

int main(void)
{
    int i, j;
    long long int ans;
    scanf("%d", &n);
    for (i = 0; i < n; i++) {
        scanf("%d", &data[i]);
    }
    tmp = 0;
    for (i = 0; i < n; i++) {
        if (data[i] != 0) {
            data[i] += tmp;
            ans += data[i] / 2;
            tmp = data[i] % 2;
        } else {
            tmp = 0;
        }
    }
    printf("%lld\n", ans);
    return 0
}

Compiler output:
main.c: In function 'main':
main.c:24:13: error: expected ';' before '}' token
   24 |     return 0
      |             ^
      |             ;
   25 | }
      | ~
Language: C++

#include <stdio.h>
 
unsigned long long int min(unsigned long long int a,unsigned long long int b){
	if(a > b)
		return a;
	else
		return b;
}
 
int main(void)
{
	unsigned long long int N = 0,A[100000] = {0};
	int i = 0,j = 0,k = 0,l = 0;
	unsigned long long int ans = 0;
	
	scanf("%d",&N);
	for(i = 0;i < N;i++)
		scanf("%d",&A[i]);
	
	for(i = 0;i < N;i++){
		while(1){
			if(A[i] > 1){
				ans += A[i] / 2;
				A[i] %= 2;
			}else if(A[i] > 0 && A[i + 1] > 0){
				ans += min(A[i],A[i + 1]) / 2;
                                l = min(A[i],A[i + 1]);
				A[i] -= l
				A[i + 1] -= l;
			}else{
				break;
			}
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:42: error: expected ';' before 'A'
   28 |                                 A[i] -= l
      |                                          ^
      |                                          ;
   29 |                                 A[i + 1] -= l;
      |                                 ~
Language: C++

unsigned long long int min(unsigned long long int a,unsigned long long int b){
	if(a < b)
		return a;
	else
		return b;
}
 
int main(void)
{
	unsigned long long int N = 0,A[100000] = {0};
	int i = 0,j = 0,k = 0,l = 0;
	unsigned long long int ans = 0;
	
	scanf("%d",&N);
	for(i = 0;i < N;i++)
		scanf("%d",&A[i]);
	
	for(i = 0;i < N;i++){
		while(1){
			if(A[i] > 1){
				ans += A[i] / 2;
				A[i] %= 2;
			}else if(A[i] > 0 && A[i + 1] > 0){
				ans += min(A[i],A[i + 1]) / 2;
				A[i] -= min(A[i],A[i + 1]);
				A[i + 1] -= min(A[i],A[i + 1]);
			}else{
				break;
			}
		}
	}
	printf("%lld\n",ans);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:9: error: 'scanf' was not declared in this scope
   14 |         scanf("%d",&N);
      |         ^~~~~
a.cc:32:9: error: 'printf' was not declared in this scope
   32 |         printf("%lld\n",ans);
      |         ^~~~~~
a.cc:1:1: note: 'printf' is defined in header '<cstdio>'; this is probably fixable by adding '#include <cstdio>'
  +++ |+#include <cstdio>
    1 | unsigned long long int min(unsigned long long int a,unsigned long long int b){
Language: Java

import java.util.Scanner;

public class B {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        long[] cards = new long[n];
        for (int i = 0; i < n; i++) {
            cards[i] = sc.nextInt();
        }

        int pairCount = 0;
        for (int i = 0; i < n; i++) {
            long prevMin = 0, nextMin = 0;
            long prevPair = 0, prevCurrentPair = 0, nextCurrentPair = 0, nextPair = 0;
            if (i > 0) {
                prevMin = Math.min(cards[i - 1], cards[i]);
                prevMin = prevMin > 0 ? prevMin : 0;
                prevPair = (cards[i - 1] - prevMin) / 2;
                prevCurrentPair = (cards[i] - prevMin) / 2;
            }
            if(i < n - 1) {
                nextMin = Math.min(cards[i], cards[i + 1]);
                nextMin = nextMin > 0 ? nextMin : 0;
                nextPair = (cards[i + 1] - nextMin) / 2;
                nextCurrentPair = (cards[i] - nextMin) / 2;
            }

            long prev = prevMin + prevPair + prevCurrentPair;
            long next = nextMin + nextPair + nextCurrentPair;

            if(prev == 0 && next == 0) continue;

            if (prev > next) {
                cards[i - 1] -= prevMin + prevPair * 2;
                cards[i] -= prevMin + prevCurrentPair * 2;
                pairCount += prev;
            } else if (next > prev) {
                cards[i] -= nextMin + nextCurrentPair * 2;
                cards[i + 1] -= nextMin + nextPair * 2;
                pairCount += next;
            }
        }
        if(n == 1) {
            pairCount = (int) (cards[0] / 2);
        }

        System.out.println(pairCount);
    }
}

Compiler output:
Main.java:3: error: class B is public, should be declared in a file named B.java
public class B {
       ^
1 error
Language: C++

#include<iostream>
#include<queue>
#include<cstring>
#include<vector>
using namespace std;
typedef long long ll;
int main()
{
    int n;
    cin>>n;
    vector<ll> v;
    for(int i=0;i<n;i++)
    {
        ll a;
        cin>>a;
        v.push_back(a);
    }
    ll dp1[n+1];
    ll dp2[n+1];
    memset(dp1,0,sizeof(dp1));
    memset(dp2,0,sizeof(dp2));
    dp1[0]=v[0]/2;
    dp2[0]=0;
    for(int i=1;i<n;i++)
    {
        dp1[i]=max((dp1[i-1]+(v[i]/2)),(dp2[i-1]+(v[i]/2)));
        dp2[i]=max(dp2[i-1],((dp1[i-1]-(v[i-1]/2))+((v[i-1]+(v[i]/2))));
    }
    cout<<max(dp1[n-1],dp2[n-1])<<endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:72: error: expected ')' before ';' token
   27 |         dp2[i]=max(dp2[i-1],((dp1[i-1]-(v[i-1]/2))+((v[i-1]+(v[i]/2))));
      |                   ~                                                    ^
      |                                                                        )
Language: C++

#include<cstdio>
#include<cstring>

long long int a[100010];

int main(){

	int n
        long long int ans=0;
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%lld",&a[i]);
		if(a[i]!=0 && a[i]%2==0){
			ans+=(a[i]/2-1);
			a[i]=2;
		}
		else if(a[i]!=0){
			ans+=(a[i]/2);
			a[i]=1;
		}
		//printf("ans1:%d\n",ans);
	}
	
	int tmp=0;
	for(int i=1;i<n;i++){
		if(a[i]==1 && (a[i+1]==1 || a[i+1]==2)){
			ans++;
			a[i]--;
			a[i+1]--;
		}
	}

	//printf("ans2:%d\n",ans);

	for(int i=1;i<=n;i++){
		if(a[i]==2){
			ans++;
			a[i]=0;
		}
	}
	printf("%lld",ans);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: expected initializer before 'long'
    9 |         long long int ans=0;
      |         ^~~~
a.cc:10:21: error: 'n' was not declared in this scope
   10 |         scanf("%d",&n);
      |                     ^
a.cc:14:25: error: 'ans' was not declared in this scope
   14 |                         ans+=(a[i]/2-1);
      |                         ^~~
a.cc:18:25: error: 'ans' was not declared in this scope
   18 |                         ans+=(a[i]/2);
      |                         ^~~
a.cc:27:25: error: 'ans' was not declared in this scope
   27 |                         ans++;
      |                         ^~~
a.cc:37:25: error: 'ans' was not declared in this scope
   37 |                         ans++;
      |                         ^~~
a.cc:41:23: error: 'ans' was not declared in this scope
   41 |         printf("%lld",ans);
      |                       ^~~
Language: Java

import java.util.Scanner;

public class B {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        long[] cards = new long[n];
        for (int i = 0; i < n; i++) {
            cards[i] = sc.nextInt();
        }

        int pairCount = 0;
        for (int i = 0; i < n; i++) {
            long prevMin = 0, nextMin = 0;
            long prevPair = 0, prevCurrentPair = 0, nextCurrentPair = 0, nextPair = 0;
            if (i > 0) {
                prevMin = Math.min(cards[i - 1], cards[i]);
                prevMin = prevMin > 0 ? prevMin : 0;
                prevPair = (cards[i - 1] - prevMin) / 2;
                prevCurrentPair = (cards[i] - prevMin) / 2;
            }
            if(i < n - 1) {
                nextMin = Math.min(cards[i], cards[i + 1]);
                nextMin = nextMin > 0 ? nextMin : 0;
                nextPair = (cards[i + 1] - nextMin) / 2;
                nextCurrentPair = (cards[i] - nextMin) / 2;
            }

            long prev = prevMin + prevPair + prevCurrentPair;
            long next = nextMin + nextPair + nextCurrentPair;

            if(prev == 0 && next == 0) continue;

            if (prev > next) {
                cards[i - 1] -= prevMin + prevPair * 2;
                cards[i] -= prevMin + prevCurrentPair * 2;
                pairCount += prev;
            } else if (next > prev) {
                cards[i] -= nextMin + nextCurrentPair * 2;
                cards[i + 1] -= nextMin + nextPair * 2;
                pairCount += next;
            }
        }

        System.out.println(pairCount);
    }
}

Compiler output:
Main.java:3: error: class B is public, should be declared in a file named B.java
public class B {
       ^
1 error
Language: C++

#include <sstream>
#include <string>
#include <vector>
#include <algorithm>
#include <numeric>
#include <set>
#include <map>
#include <queue>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstring>

using namespace std;

int main(){

	int N,ret=0;
	long long int tmp;
	vector<long long int> A;
	cin>>N;


	for(int i=0;i<N;i++){
		cin>>tmp;
		A.push_back(tmp);
	}
	for(int i=0;i<N;i++){
		for(int j=0;j<N;j++){
			if(j>0 && A[j]>0 && A[j-1]>0){
				if(A[j-1]>A[j]){
					ret+=A[j];
					A[j-1]-=A[j];
					A[j]=0;
				}else{
					ret+=A[j-1];
					A[j]-=A[j-1];
					A[j-1]=0;
				}
			}else if(A[j]>1){
				if(A[j]%2==0){
					ret+=A[j]/2;
					A[j]=0;
				}else {
					ret+=(A[j]-1)/2;
					A[j]=1;
				}

			}else if(j<N-1 && A[j]>0 && A[j+1]>0){
				if(A[j+1]>A[j]){
					ret+=A[j];
					A[j+1]-=A[j];
					A[j]=0;
				}else{
					ret+=A[j+1];
					A[j]-=A[j+1];
					A[j+1]=0;
				}
			}
		}

	cout<<ret<<endl;

	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:65:2: error: expected '}' at end of input
   65 | }
      |  ^
a.cc:16:11: note: to match this '{'
   16 | int main(){
      |           ^
Language: C

#include<stdio.h>
int main(void){
	int i=0,j=0;
	int x=0,y[10000000000];
	scanf("%d",&x);
	

	for (j= 1; j<= x; ++j)
	{ 
		scanf("%d",&y[j])
		}
	for (i = 1; i <= x; ++i)
	{
	 j+=y[i]/2;y[i+1]=y[i]%2;
	}
	printf("%d\n",j);
	
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:10:34: error: expected ';' before '}' token
   10 |                 scanf("%d",&y[j])
      |                                  ^
      |                                  ;
   11 |                 }
      |                 ~
Language: C++

#include <bits/stdc++.h>
using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef pair<int, int> pii;
typedef long long ll;
typedef unsigned long long ull;

#define all(a)  (a).begin(),(a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define pb push_back
#define mp make_pair
#define loop(i,a,b) for(ull i=(a);i<ull(b);++i)
#define rep(i,n) loop(i,0,n)
#define iter(i,c) for(auto i=(c).begin(); i!=(c).end(); ++i)
#define riter(i,c) for(auto i=(c).rbegin(); i!=(c).rend(); ++i)

const double eps = 1e-10;
const double pi  = acos(-1.0);
const double inf = (int)1e8;

#define clr(a,i) memset((a), (i) ,sizeof(a))

int main(){
  long long n,ans=0;
  std::cin >> n;
  std::vector<long long> v; a(n);
  rep(i,n){
    std::cin >> a[i];
  }
  long long tmp=0;
  rep(i,n){
      if(a[i]==0){
        ans+=tmp/2;
        tmp=0;
      }else{
        tmp+=a[i];
      }
  }
  ans+=tmp/2;
  // rep(i,n-1){
  //   if(a[i]%2==1&&a[i+1]%2==1){
  //     ans++;
  //     a[i]--;a[i+1]--;
  //   }
  // }
  // rep(i,n-1){
  //   if(a[i]%2==1&&a[i+1]>1){
  //     a[i]--;a[i+1]--;
  //     ans++;
  //   }
  // }
  // // rep(i,n-2){
  // //   if(a[i]%2==1&&a[i+2]%2==1&&a[i+1]>1){
  // //     a[i]--;a[i+1]-=2;a[i+2]--;
  // //     ans+=2;
  // //   }
  // // }
  // rep(i,n){
  //   if(a[i]>1) {
  //     ans+=a[i]/2;
  //     a[i]=a[i]%2;
  //   }
  // }
  std::cout << ans << std::endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:29: error: 'a' was not declared in this scope
   31 |   std::vector<long long> v; a(n);
      |                             ^
Language: Java

import java.util.Scanner;

public class B {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();

        long[] cards = new long[n];
        for (int i = 0; i < n; i++) {
            cards[i] = sc.nextInt();
        }

        int pairCount = 0;
        for (int i = 0; i < n; i++) {
            long prevMin = 0, nextMin = 0;
            long prevPair = 0, prevCurrentPair = 0, nextCurrentPair = 0, nextPair = 0;
            if (i > 0) {
                prevMin = Math.min(cards[i - 1], cards[i]);
                prevMin = prevMin > 0 ? prevMin : 0;
                prevPair = (cards[i - 1] - prevMin) / 2;
                prevCurrentPair = (cards[i] - prevMin) / 2;
            } else if(i < n - 1) {
                nextMin = Math.min(cards[i], cards[i + 1]);
                nextMin = nextMin > 0 ? nextMin : 0;
                nextPair = (cards[i + 1] - nextMin) / 2;
                nextCurrentPair = (cards[i] - nextMin) / 2;
            }

            long prev = prevMin + prevPair + prevCurrentPair;
            long next = nextMin + nextPair + nextCurrentPair;

            if (prev >= next) {
                cards[i - 1] -= prevMin + prevPair * 2;
                cards[i] -= prevMin + prevCurrentPair * 2;
                pairCount += prev;
            } else if (next > prev) {
                cards[i] -= nextMin + nextCurrentPair * 2;
                cards[i + 1] -= nextMin + nextPair * 2;
                pairCount += next;
            }
        }

        System.out.println(pairCount);
    }
}

Compiler output:
Main.java:3: error: class B is public, should be declared in a file named B.java
public class B {
       ^
1 error
Language: C++

#include<bits/stdc++.h>
#define range(i,a,b) for(int i = (a); i < (b); i++)
#define rep(i,b) range(i,0,b)
#define all(a) (a).begin(), (a).end()
#define debug(x) cout << "debug " << x << endl;
#define INF (1 << 30)
using namespace std;

int main(){
    long long a[200005];
    long longn;
    long long ans = 0;

    cin >> n;
    rep(i,n) cin >> a[i];
    /*
    rep(i,n - 1){
        if(a[i] > 0 && a[i + 1] > 0){
            if(a[i] >= a[i + 1]){
                ans+=a[i + 1];
                a[i]-=a[i + 1];
                a[i + 1] = 0;
            }else{
                ans+=a[i];
                a[i + 1]-=a[i];
                a[i] = 0;
            }
        }
    }
    rep(i,n){
        ans+=(a[i] / 2);
    }
    */
    rep(i,n - 1){
        if(a[i] / 2 >= min(a[i], a[i + 1])){
            ans+=a[i] / 2;
        }else{
            if(a[i] >= a[i + 1]){
                ans+=a[i + 1];
                a[i]-=a[i + 1];
                a[i + 1] = 0;
            }else{
                ans+=a[i];
                a[i + 1]-=a[i];
                a[i] = 0;
            }
        }
    }
    cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:12: error: 'n' was not declared in this scope
   14 |     cin >> n;
      |            ^
Language: C++

#include <vector>
#include <cstdlib>
using namespace std;
int main() {
	int n,d,cnt=0;
	vector<long long> a;
	cin >> n;
	for (int i = 0; i < n; i++) {
		cin >> d;
		a.push_back(d);
	}

	for (int i = 0; i < n; i++) {
		cnt += a[i] / 2;
		if (i != n - 1) {
			if (a[i] % 2 == 1) {
				if (abs(a[i + 1] - a[i]) <= 1) {
					cnt++;
					a[i + 1]--;
				}
			}
		}
	}
	cout << cnt << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'cin' was not declared in this scope
    7 |         cin >> n;
      |         ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include <cstdlib>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:24:9: error: 'cout' was not declared in this scope
   24 |         cout << cnt << endl;
      |         ^~~~
a.cc:24:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:24:24: error: 'endl' was not declared in this scope
   24 |         cout << cnt << endl;
      |                        ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include <cstdlib>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C++

#include <iostream>
#include <fstream>
#include <typeinfo>
#include <vector>
#include <cmath>
#include <map>
#include <string>
#include <algorithm>
#include <cstdio>
#include <queue>
#include <iomanip>
#include <cctype>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
using namespace std;
typedef long long ll;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const double pi=acos(-1);
const double eps=1e-8;

ll n,ans=0;
vector<ll> num;

int main(){
	cin>>n;
	num=vi(n);
	for(int i=0;i<n;i++) cin>>num[i];
	for(int i=0;i<n;i++){
		int tmp=num[i]/2;
		ans+=tmp;
		num[i]-=tmp*2;
		if(num[i]==1&&i+1!=n&&num[i+1]){
				num[i+1]--;
			ans++;
		}
	}
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:17: error: no match for 'operator=' (operand types are 'std::vector<long long int>' and 'vi' {aka 'std::vector<int>'})
   34 |         num=vi(n);
      |                 ^
In file included from /usr/include/c++/14/vector:72,
                 from a.cc:4:
/usr/include/c++/14/bits/vector.tcc:210:5: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(const std::vector<_Tp, _Alloc>&) [with _Tp = long long int; _Alloc = std::allocator<long long int>]'
  210 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/vector.tcc:211:42: note:   no known conversion for argument 1 from 'vi' {aka 'std::vector<int>'} to 'const std::vector<long long int>&'
  211 |     operator=(const vector<_Tp, _Alloc>& __x)
      |               ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/14/vector:66:
/usr/include/c++/14/bits/stl_vector.h:766:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::vector<_Tp, _Alloc>&&) [with _Tp = long long int; _Alloc = std::allocator<long long int>]'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:766:26: note:   no known conversion for argument 1 from 'vi' {aka 'std::vector<int>'} to 'std::vector<long long int>&&'
  766 |       operator=(vector&& __x) noexcept(_Alloc_traits::_S_nothrow_move())
      |                 ~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:788:7: note: candidate: 'std::vector<_Tp, _Alloc>& std::vector<_Tp, _Alloc>::operator=(std::initializer_list<_Tp>) [with _Tp = long long int; _Alloc = std::allocator<long long int>]'
  788 |       operator=(initializer_list<value_type> __l)
      |       ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:788:46: note:   no known conversion for argument 1 from 'vi' {aka 'std::vector<int>'} to 'std::initializer_list<long long int>'
  788 |       operator=(initializer_list<value_type> __l)
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
Language: Java

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class B {

	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int N = Integer.parseInt(br.readLine());
		int[] A = new int[N];
		int sum = 0;
		for(int i=0;i<N;i++){
			A[i] = Integer.parseInt(br.readLine());
			if(A[i]>=2){
				sum += A[i]/2;
				A[i] = A[i]%2;
			}
		}
		
		for(int i=0;i<N-1;i++){
			if(A[i]>0 && A[i+1]>0){
				sum += Math.min(A[i], A[i+1]);
				A[i] = A[i+1] -= Math.min(A[i], A[i+1]);
			}
		}
		
		System.out.println(sum);
	}

}


Compiler output:
Main.java:4: error: class B is public, should be declared in a file named B.java
public class B {
       ^
1 error
Language: C++

#include "stdio.h"

int i = 0;
int num;
long long int figure[100000];
long long int box[100000];
long long int ans=0;
long long int sum = 0;


int main() {
	sscanf("%d", &num);
	for (i = 0; i < num; i++) {
		figure[i] = 0;
		box[i] = 0;
		sscanf("%lld", &figure[i]);
		box[i] = figure[i];
	}
	for (i = 0; i < num-1; i++) {
		if (box[i] >= box[i + 1]) {
			ans += box[i + 1];
			box[i] -= box[i + 1];
			box[i + 1] = 0;
		}
		else {
			ans += box[i];
			box[i + 1] -= box[i];
			box[i] = 0;
		}
	}
	for (i = 0; i < num; i++) {
		ans += box[i] / 2;
	}


	for (i = num; i > 0; i--) {
		if (figure[i] >= figure[i - 1]) {
			sum += figure[i - 1];
			figure[i] -= figure[i - 1];
			figure[i - 1] = 0;
		}
		else {
			sum += figure[i];
			figure[i - 1] -= figure[i];
			figure[i] = 0;
		}
	}
	if (ans > sum) {
		printf("%lld", ans);
	}
	else printf("%lld", sum);

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: cannot convert 'int*' to 'const char*'
   12 |         sscanf("%d", &num);
      |                      ^~~~
      |                      |
      |                      int*
In file included from a.cc:1:
/usr/include/stdio.h:431:43: note:   initializing argument 2 of 'int sscanf(const char*, const char*, ...)'
  431 |                    const char *__restrict __format, ...) __THROW;
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
a.cc:16:32: error: cannot convert 'long long int*' to 'const char*'
   16 |                 sscanf("%lld", &figure[i]);
      |                                ^~~~~~~~~~
      |                                |
      |                                long long int*
/usr/include/stdio.h:431:43: note:   initializing argument 2 of 'int sscanf(const char*, const char*, ...)'
  431 |                    const char *__restrict __format, ...) __THROW;
      |                    ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
Language: C++

#include <iostream>

using namespace std;

long long n;
unsigned long long a[1000000];
unsigned long long dp[1000000][3];

int main()
{
    cin >> n;
    for(int i = 1 ; i <= n ; i++)
    {
        cin >> a[i];
    }
    dp[1][0] = a[1] / 2;
    dp[1][1] = (a[1] + a[2]) / 2;
    for(int i = 2 ; i <= n ; i++)
    {
        dp[i][0] = max(dp[i-1][0] + (a[i]/2) , dp[i-1][1]);
        if(i != n)
        dp[i][1] = max(dp[i-1][0] + ((a[i] + a[i+1])/2) , dp[i-1][1] );
        else dp[i][1] = max(dp[i-1][0] + ((a[i]/2) , dp[i-1][1] ));
    }
    cout << max(dp[n][0] , dp[n][1]) << '\n';
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:28: error: no matching function for call to 'max(long long unsigned int)'
   23 |         else dp[i][1] = max(dp[i-1][0] + ((a[i]/2) , dp[i-1][1] ));
      |                         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
Language: C++

#include <iostream>

using namespace std;

long long n;
unsigned long long a[1000000];
unsigned long long dp[1000000][3];

int main()
{
    cin >> n;
    for(int i = 1 ; i <= n ; i++)
    {
        cin >> a[i];
    }
    dp[1][0] = a[1] / 2;
    dp[1][1] = (a[1] + a[2]) / 2;
    for(int i = 2 ; i <= n ; i++)
    {
        dp[i][0] = max(dp[i-1][0] + (a[i]/2) , dp[i-1][1]);
        if(i != n)
        dp[i][1] = max(dp[i-1][0] + ((a[i] + a[i+1])/2) , dp[i-1][1] );
        else dp[i][1] = max(dp[i-1][0] + ((a[i]/2) , dp[i-1][1] );
    }
    cout << max(dp[n][0] , dp[n][1]) << '\n';
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:66: error: expected ')' before ';' token
   23 |         else dp[i][1] = max(dp[i-1][0] + ((a[i]/2) , dp[i-1][1] );
      |                            ~                                     ^
      |                                                                  )
Language: C++

#include <bits/stdc++.h>
using namespace std;

LL q,rs,n,a;
int main()
{
	cin>>n;
	for(int i=1; i<=n; ++i)
	{
		cin>>a;
		
		if(a%2==1)
		{
			rs+=a/2;
			if(q)
			{
			 	q=0;
				rs++;
			}else
			{
				
				q=1;
			}
		}else
		{
			if(a>=2){
			rs+=a/2;
			
			}else
			q=0;
		}
	}
	cout<<rs;
}


Compiler output:
a.cc:4:1: error: 'LL' does not name a type
    4 | LL q,rs,n,a;
      | ^~
a.cc: In function 'int main()':
a.cc:7:14: error: 'n' was not declared in this scope; did you mean 'yn'?
    7 |         cin>>n;
      |              ^
      |              yn
a.cc:10:22: error: 'a' was not declared in this scope
   10 |                 cin>>a;
      |                      ^
a.cc:14:25: error: 'rs' was not declared in this scope
   14 |                         rs+=a/2;
      |                         ^~
a.cc:15:28: error: 'q' was not declared in this scope
   15 |                         if(q)
      |                            ^
a.cc:27:25: error: 'rs' was not declared in this scope
   27 |                         rs+=a/2;
      |                         ^~
a.cc:30:25: error: 'q' was not declared in this scope
   30 |                         q=0;
      |                         ^
a.cc:33:15: error: 'rs' was not declared in this scope
   33 |         cout<<rs;
      |               ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main(){
  int n,a;
  cin>>n;
  int arr[n];
  for(int i=0; i<n; ++i){
    arr[i]=0;
  }
  for(int i=0; i<n; ++i){
    cin>>a;
    arr[i-1]=a;
  }
  int x=0;
  for(int i=0; i<n; ++i){
    int b=arr[i];
    while(1){
      if(b<2){
        arr[i]=b;
      }
      b-=2;
      x++;
    }
  }
  for(int i=0; i<n-1; ++i){
    if(arr[i]==1 && arr[i+1]==1){
      arr[i]--;
      arr[i-1]-;
      x++;
    }
  }
  cout<<x<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:16: error: expected primary-expression before ';' token
   30 |       arr[i-1]-;
      |                ^
Language: C++

#include <iostream>
using namespace std ;

int main()
{
  int t ;
  cin>>t ;
  long int a[t], z ;
  long long int ans = 0 ;
  for (int i=0;i<t;i++) cin>>a[i] ;
  for (int i=0;i<t-1;i++) {
    z = min(a[i],a[i+1]) ;
    ans += z ;
    a[i+1] -= z ;
    a[i] -= z ;
    ans += a[i]/2 ;
  }
  ans += a[n-1]/2 ;
  cout<<ans<<endl ;
  return 0 ;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:12: error: 'n' was not declared in this scope
   18 |   ans += a[n-1]/2 ;
      |            ^
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <ctype.h>
#include <deque>
#include <queue>
#include <cstring>
#include <set>
#include <list>
#include <map>
#include <random>
#include <unordered_map>
#include <stdio.h>

using namespace std;

typedef long long ll;
typedef std::vector<int> vi;
typedef std::vector<bool> vb;
typedef std::vector<string> vs;
typedef std::vector<double> vd;
typedef std::vector<long long> vll;
typedef std::vector<std::vector<int> > vvi;
typedef vector<vvi> vvvi;
typedef vector<vll> vvll;
typedef std::vector<std::pair<int, int> > vpi;
typedef vector<vpi> vvpi;
typedef std::pair<int, int> pi;
typedef std::pair<ll, ll> pll;
typedef std::vector<pll> vpll;

const long long mod = 1000000007;

#define all(c) (c).begin(),(c).end()
#define sz(c) (int)(c).size()
#define forn(i, a, b) for(int i = a; i < b; i++)

#define pb push_back
#define mp make_pair

int main()
{
#ifndef ONLINE_JUDGE
    freopen("input.txt", "rt", stdin);
    freopen("output.txt", "wt", stdout);
#endif
    int n;
    cin>>n;
    vi a(n);
    forn(i,0,n) {
        cin>>a[i];
    }
    sort(all(a));
    int cur = 0;
    int ans = 0;
    while(cur<n) {
        if(a[i+1]-a[i] < 2) {
            ans++;
            cur+=2;
        }
        else cur++;
    }
    cout<<ans<<endl;
    
    
    
}



Compiler output:
a.cc: In function 'int main()':
a.cc:58:14: error: 'i' was not declared in this scope
   58 |         if(a[i+1]-a[i] < 2) {
      |              ^
Language: C++

#include <bits/stdc++.h>
#include<atcoder/all>

#define ll long long
#define ld long double

#define rep(i, n) for(ll i = 0; i < n; ++i)
#define rep2(i, a, b) for(ll i = a; i <= b; ++i)
#define rrep(i, a, b) for(ll i = a; i >= b; --i)

#define pii pair<int, int>
#define pll pair<ll, ll>

#define fi first
#define se second

#define pb push_back
#define eb emplace_back

#define vi vector<int>
#define vll vector<ll>
#define vpii vector<pii>
#define vpll vector<pll>

#define all(a) a.begin(), a.end()

#define endl '\n'
using namespace std;
using namespace atcoder;

template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; }

const ll MOD=10000007;//998244353
const ll INF=1e18;
const int inf=1e9;
const double PI=acos(-1);
int dx[8] = {1,0,-1,0,1,1,-1,-1};
int dy[8] = {0,1,0,-1,-1,1,1,-1};
 
const int MAX=1e6+10;

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false); 
   
  int n;
  cin >> n;
  vi a(n);
  rep(i,n) cin >> a[i];
  vi b((n+1)/2),c(n/2);
  rep(i,n){
    if(i%2==0)b[i/2]=a[i];
    else c[i/2]=a[i];
  }
  sort(all(b));
  sort(all(c));
  
  int ans = 0;
  int cur = 0;
  while(cur<n/2){
    if(b[cur]<c[cur]){
      cur++;
    }
    else{
      ans++;
      swap(b[cur],c[cur]);
    }
  }
  cout << ans << endl;
  return 0;
}


Compiler output:
a.cc:2:9: fatal error: atcoder/all: No such file or directory
    2 | #include<atcoder/all>
      |         ^~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
#include <cstdlib>
#include <cmath>
#include <algorithm>
using namespace std;
using ll = long long;
using P = pair<int,int>;
using Graph= vector<vector<ll>>; 
#define rep(i,n) for (ll i=0; i < (n); ++i)
#define rep2(i,n,m) for(ll i=n;i<=m;i++)
#define rep3(i,n,m) for(ll i=n;i>=m;i--)
#define pb push_back
#define eb emplace_back
#define ppb pop_back
const ll INF=1e18 ;
inline void chmax(ll& a,ll b){a=max(a,b);}
inline void chmin(ll& a,ll b){a=min(a,b);}

int main(){
   ll n;
   cin>> n ;
   vector<ll> A(n) ;
   rep(i,n) cin>> A[i] ;
  map<ll ,ll> mp ;
  rep(i,n){
    mp[A[i]] = i ;
  }
   sort(A.begin(),A.end()) ;
   rep(i,n){
    if((mp[A[i]]-i)%2==1) ans++ ;
   } 
    cout << ans <<endl ;
    return 0;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:30:27: error: 'ans' was not declared in this scope; did you mean 'abs'?
   30 |     if((mp[A[i]]-i)%2==1) ans++ ;
      |                           ^~~
      |                           abs
a.cc:32:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   32 |     cout << ans <<endl ;
      |             ^~~
      |             abs
Language: C++

#include <iostream>
#include <algorithm>

#define int long long

signed main()
{
  int n;
  std::cin >> n;
  
  std::pair<int, int> a[n];
  for(int i = 0; i < n; i++) {
    std::cin >> a[i].first;
    a[i].second = i%2;
  }
  
  std::sort(a, a+n);
  
  int ans = 0;
  for(int i = 0; i < n; i++)
    ans += (i%2 != a[i].second);
  
  std::cout << ans/2 << std::endl
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:34: error: expected ';' before 'return'
   23 |   std::cout << ans/2 << std::endl
      |                                  ^
      |                                  ;
   24 |   return 0;
      |   ~~~~~~
Language: C++

#include <Bits/stdc++.h> 
using namespace std;
const int maxn=1e5+5;
const long long sg=1e10;
long long a,b,c,d,e,f,g,n,m,i,j,sdg[maxn],lili,t;
long long  x[maxn][10],z[maxn],v[101][101],h[maxn];
string p[maxn],s[maxn];
queue<int>q;
bool mark[maxn];
vector<long long> o[maxn],sgd;
map<long long,long long> mp;
char l[10][10],y;
int main(){
ios::sync_with_stdio(false) , cin.tie(0) , cout.tie(0);
cin>>a;
for(i=0;i<a;i++){
	cin>>z[i];
	mp[z[i]]=i;
}
sort(z,z+a);
b=0;
for(i=0;i<a;i++){
	if(i%2!=mp[z[i]]%2){
		b++;
	}
}
cout<<b/2<<endl;
return 0;}


Compiler output:
a.cc:1:10: fatal error: Bits/stdc++.h: No such file or directory
    1 | #include <Bits/stdc++.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<Bits/stdc++.h> 
using namespace std;
const int maxn=1e5+5;
const long long sg=1e10;
long long a,b,c,d,e,f,g,n,m,i,j,sdg[maxn],lili,t;
long long  x[maxn][10],z[maxn],v[101][101],h[maxn];
string p[maxn],s[maxn];
queue<int>q;
bool mark[maxn];
vector<long long> o[maxn],sgd;
map<long long,long long> mp;
char l[10][10],y;
int main(){
ios::sync_with_stdio(false) , cin.tie(0) , cout.tie(0);
cin>>a;
for(i=0;i<a;i++){
	cin>>z[i];
	mp[z[i]]=i;
}
sort(z,z+a);
b=0;
for(i=0;i<a;i++){
	if(i%2!=mp[z[i]]%2){
		b++;
	}
}
cout<<b/2<<endl;
return 0;}


Compiler output:
a.cc:1:9: fatal error: Bits/stdc++.h: No such file or directory
    1 | #include<Bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits\stdc++.h> 
using namespace std;
const int maxn=1e5+5;
const long long sg=1e10;
long long a,b,c,d,e,f,g,n,m,i,j,sdg[maxn],lili,t;
long long  x[maxn][10],z[maxn],v[101][101],h[maxn];
string p[maxn],s[maxn];
queue<int>q;
bool mark[maxn];
vector<long long> o[maxn],sgd;
map<long long,long long> mp;
char l[10][10],y;
int main(){
ios::sync_with_stdio(false) , cin.tie(0) , cout.tie(0);
cin>>a;
for(i=0;i<a;i++){
	cin>>z[i];
	mp[z[i]]=i;
}
sort(z,z+a);
b=0;
for(i=0;i<a;i++){
	if(i%2!=mp[z[i]]%2){
		b++;
	}
}
cout<<b/2<<endl;
return 0;}


Compiler output:
a.cc:1:9: fatal error: bits\stdc++.h: No such file or directory
    1 | #include<bits\stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<bits\stdc++.h> 
using namespace std;
const int maxn=10e5+5;
const long long sg=1e10;
long long a,b,c,d,e,f,g,n,m,i,j,sdg[maxn],lili,t;
long long  x[maxn][10],z[maxn],v[101][101],h[maxn];
string p[maxn],s[maxn];
queue<int>q;
bool mark[maxn];
vector<long long> o[maxn],sgd;
map<long long,long long> mp;
char l[10][10],y;
int main(){
ios::sync_with_stdio(false) , cin.tie(0) , cout.tie(0);
cin>>a;
for(i=0;i<a;i++){
	cin>>z[i];
	mp[z[i]]=i;
}
sort(z,z+a);
b=0;
for(i=0;i<a;i++){
	if(i%2!=mp[z[i]]%2){
		b++;
	}
}
cout<<b/2<<endl;
return 0;}


Compiler output:
a.cc:1:9: fatal error: bits\stdc++.h: No such file or directory
    1 | #include<bits\stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using ll = long long;
using namespace std;
#define rep(i,n) for(int i=0, i##_len=(int)(n); i<i##_len; i++)
#define reps(i,n) for(int i=1 , i##_len=(int)(n);i<=i##_len;i++)
#define rrep(i,n) for(int i=((int)(n)-1);i>=0;i--)
#define rreps(i,n) for(int i=((int)(n));i>0;i--)
#define repi(i,x) for(auto i=(x).begin(),i##_fin=(x).end();i!=i##_fin;i++)
#define all(x) (x).begin(), (x).end()
#define F first
#define S second
#define mp make_pair
#define pb push_back
#define solve(a) ((a)?"Yes":"No")
typedef vector<int> Vi;
typedef vector<Vi> VVi;
typedef pair<int , int> Pi;
typedef vector<Pi> VPi;
typedef vector<long long> V;
typedef vector<V> VV;
typedef pair<long long , long long> P;
typedef vector<P> VP;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1;} return 0;}
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1;} return 0;}
const long long INFLL = 1LL<<60;
const int INF = 1<<30;
const double PI=acos(-1);

int main(){
	int n;
	int ans=0;
	cin >>n;
	Vi a(n);
	Vi o, e;
	rep(i,n){
		cin>>a[i];
		if(i%2){
			o.pb(a[i]);
		}else{
			e.pb(a[i]);
		}
	}
	if(n==1){
		cout<<0<<endl;
		return 0;
	}
	sort(all(a));
	sort(all(e));
	auto ter;
	for(int i=0;i<n/2;i++){
		ter = lower_bound(all(e), a[i * 2])
		if(ter==e.end()){
			ans++;
		} else if (a[i * 2] != *ter)
		{
			ans++;
		}
	}
	cout<<ans<<endl;
}
/*
5 4 3 2 1
3 4 5 2 1
3 4 1 2 5
3 2 1 4 5
1 2 3 4 5

2 4 3 1
2 1 3 4

2 3 1
1 3 2 -> 1

6 5 4 3 2 1
6 4 2
5 3 1
1 2 3 4 5 6
2 1 4 3 6 5
4 1 2 5 6 3
4 1 6 5 2 3
6 1 4 5 2 3
6 5 4 1 2 3

1 5 3 4 2 6
1 5 2 4 3 6
1 4 2 5 3 6
1 4 5 2 3 6
1 2 5 4 3 6
11 2 3 4 5
1 6 3 4 5 2
1 4 3 6 5 2
1 4 3 2 5 6
1 2 3 4
*/

Compiler output:
a.cc: In function 'int main()':
a.cc:49:9: error: declaration of 'auto ter' has no initializer
   49 |         auto ter;
      |         ^~~~
a.cc:54:19: error: 'else' without a previous 'if'
   54 |                 } else if (a[i * 2] != *ter)
      |                   ^~~~