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

n = int(input())
a = list(map(int,input().split()))

i = int(0)
ans = int(0)
f = True


while i+1 < n:

    if a[i] < a[i+1] :
        while a[i] <= a[i+1] :
            if i+1 >= n-1:
                f=False
                break
            i += 1
        
        if f :
            ans += 1

    elif a[i] == a[i+1] :
        if i+1 >= n-1:
            break

    else:
        while a[i] >= a[i+1] :
            if i+1 >= n-1:
                f = False
                break
            i+=1
        
        if f :
            ans += 1
    
    i += 1

    
print(ans+1)
        

Compiler output:
a.cc:1:1: error: 'n' does not name a type
    1 | n = int(input())
      | ^
Language: C

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#define ll long long
const int maxn=100010;
int a[maxn];
int main(){
	int i,j,k,n,m;
	scanf("%d",&n);
	for(i=1;i<=n;i++)
		scanf("%d",&a[i]);
	int flag=0,ans=1;
	for(i=2;i<=n;i++){
		if(flag==1 && a[i]>=a[i-1])continue;
		if(flag==-1 && a[i]<=a[i-1])continue;
		if(flag==0){
			if(a[i]>a[i-1])flag=1;
			else if(a[i]<a[i-1])flag=-1;
			else flag=0;
		}
		else{
			ans++;flag=0;
		}
	}
	printf("%d\n",ans);
	return 0;
}


Compiler output:
main.c:7:5: error: variably modified 'a' at file scope
    7 | int a[maxn];
      |     ^
Language: C++

#include <iostream>
using namespace std;

int main() {
	int n;
	cin >> n;
	vector<int> a(n);
	for (auto &e : a) {
		cin >> e;
	}
	vector<int> d(n - 1);
	for (int i = 0; i < n - 1; i++) {
		d[i] = a[i + 1] - a[i];
	}
	int m = 1;
	for (int i = 0; i < n - 2; i++) {
		if (d[i + 1] == 0) {
			d[i + 1] = d[i];
		} else if (d[i] < 0 && 0 < d[i + 1] || d[i + 1] < 0 && 0 < d[i]) {
			m++;
		}
	}
	cout << m << endl;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'vector' was not declared in this scope
    7 |         vector<int> a(n);
      |         ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | using namespace std;
a.cc:7:16: error: expected primary-expression before 'int'
    7 |         vector<int> a(n);
      |                ^~~
a.cc:8:24: error: 'a' was not declared in this scope
    8 |         for (auto &e : a) {
      |                        ^
a.cc:11:16: error: expected primary-expression before 'int'
   11 |         vector<int> d(n - 1);
      |                ^~~
a.cc:13:17: error: 'd' was not declared in this scope
   13 |                 d[i] = a[i + 1] - a[i];
      |                 ^
a.cc:13:24: error: 'a' was not declared in this scope
   13 |                 d[i] = a[i + 1] - a[i];
      |                        ^
a.cc:17:21: error: 'd' was not declared in this scope
   17 |                 if (d[i + 1] == 0) {
      |                     ^
Language: C++

#include <iostream>
#include <algorithm>
#include <string>
#include <queue>
#include <vector>
#include <set>
#include <bitset>
#include <cmath>
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define ROF(i,a,b) for(int i=b-1;i>=a;i--)
#define FI first
#define SE second
#define MA(i,j) make_pair(i,j)
#define PA pair<int,int>
#define PB push_back
#define PQ priority_queue<int>
#define PGQ priority_queue<int,vector<int>,greater<int> >
#define VE vector<int>
#define VP vector<PA>
#define YES(i) cout<<(i?"YES":"NO")<<endl
#define Yes(i) cout<<(i?"Yes":"No")<<endl
#define MOD 1000000007
#define INF 1000000007
#define PI 3.141592653589793238462643383279
using namespace std;
//
int main(){
  int N;
  int A[100000];
  cin>>N;
  FOR(i,0,N){
    cin>>A[i];
  }
  if(i<=2){
    cout<<1<<endl;
    return 0;
  }
  int i=0,cnt=1;
  while(i<=N-3){
    if(A[i]<=A[i+1]&&A[i+1]<=A[i+2]){
      i++;
    }else if(A[i]>=A[i+1]&&A[i+1]>=A[i+2]){
      i++;
    }else{
      i+=2;
      cnt++;
    }
  }
  cout<<cnt<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:34:6: error: 'i' was not declared in this scope
   34 |   if(i<=2){
      |      ^
Language: Java

import java.util.Scanner;

public class AMain {
	public static void main(String[] args){
        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();
        }
        sc.close();

        long ans = 1;
        int pos = 0;    //pos: 1 zero: 0, neg: -1
        for(int i=1; i<n; i++){
            if(pos == 0){
                if(a[i] - a[i-1] < 0){
                    pos = -1; 
                }else if(a[i] - a[i-1] > 0){
                    pos = 1;
                }
            }else if(pos == 1){
                if(a[i] - a[i-1] < 0){
                    ans++;
                    pos = 0;
                }
            }else if(pos == -1){
                if(a[i] - a[i-1] > 0){
                    ans++;
                    pos = 0;
                }
            }
        }
        System.out.println(ans);
    }
}        

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

#include <bits/stdc++.h>
const int N=3050,mo=1e9+7;
using namespace std;
inline int gi(){
  char ch=getchar();int x=0,q=0;
  while(ch<'0' || ch>'9') ch=='-'?q=1:0,ch=getchar();
  while(ch>='0' && ch<='9') x=x*10+ch-'0',ch=getchar();
  return q?(-x):x;
}
int f[N][N][2];
void dp(ll &x,ll y){
  x+=y; if (x>=mo) x-=mo;
  return;
}
int main(){
  int n=gi(),m=gi();
  for (int i=0; i<=m; ++i)
    f[0][i][i==0]=1;
  for (int i=0; i<m; ++i)
    for (int j=0; j<=n; ++j)
      for (int k=0; k<=1; ++k)
      if (f[i][j][k]){
	if (j) dp(f[i+1][j-1][k|(j==1)],f[i][j][k]);
	if (j) dp(f[i+1][j][k|(j==1)],f[i][j][k]);
	if (j<n) dp(f[i+1][j+1][k],f[i][j][k]);
	if (j<n) dp(f[i+1][j][k],f[i][j][k]);
      }
  ll ans=0;
  for (int i=0; i<=n; ++i)
    dp(ans,f[m][i][1]);
  cout<<ans;
  return 0;
}


Compiler output:
a.cc:11:6: error: variable or field 'dp' declared void
   11 | void dp(ll &x,ll y){
      |      ^~
a.cc:11:9: error: 'll' was not declared in this scope
   11 | void dp(ll &x,ll y){
      |         ^~
a.cc:11:13: error: 'x' was not declared in this scope
   11 | void dp(ll &x,ll y){
      |             ^
a.cc:11:15: error: 'll' was not declared in this scope
   11 | void dp(ll &x,ll y){
      |               ^~
a.cc: In function 'int main()':
a.cc:23:16: error: 'dp' was not declared in this scope; did you mean 'dup'?
   23 |         if (j) dp(f[i+1][j-1][k|(j==1)],f[i][j][k]);
      |                ^~
      |                dup
a.cc:24:16: error: 'dp' was not declared in this scope; did you mean 'dup'?
   24 |         if (j) dp(f[i+1][j][k|(j==1)],f[i][j][k]);
      |                ^~
      |                dup
a.cc:25:18: error: 'dp' was not declared in this scope; did you mean 'dup'?
   25 |         if (j<n) dp(f[i+1][j+1][k],f[i][j][k]);
      |                  ^~
      |                  dup
a.cc:26:18: error: 'dp' was not declared in this scope; did you mean 'dup'?
   26 |         if (j<n) dp(f[i+1][j][k],f[i][j][k]);
      |                  ^~
      |                  dup
a.cc:28:3: error: 'll' was not declared in this scope
   28 |   ll ans=0;
      |   ^~
a.cc:30:8: error: 'ans' was not declared in this scope; did you mean 'abs'?
   30 |     dp(ans,f[m][i][1]);
      |        ^~~
      |        abs
a.cc:30:5: error: 'dp' was not declared in this scope; did you mean 'dup'?
   30 |     dp(ans,f[m][i][1]);
      |     ^~
      |     dup
a.cc:31:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   31 |   cout<<ans;
      |         ^~~
      |         abs
Language: C++

#include<cstdio>
#include<iostream>
#include<cmath>
#include<algorithm>
#include<string>
#include<cstring>
#include<cctype>
#include<queue>
#include<stack>
#include<map>
#include<set>
#include<iomanip>
#include<sstream>
#include<cstdlib>
#include<ctime>
#include<list>
#include<deque>
#include<bitset>
#include<fstream>
#define ld double
#define ull unsigned long long 
#define ll long long 
#define pii pair<int,int >
#define iiii pair<int,pii >
#define mp make_pair 
#define INF 1000000000
#define MOD 1000000007ll
#define MAXN 3100
using namespace std;

ll Dp[MAXN][MAXN][2];
int n,m;

int main()
{
	scanf("%d%d",&n,&m);
	
	for(int i=1;i<=n;i++)Dp[0][i][0]=1;
	Dp[0][0][1]=1;
	
	for(int i=1;i<=m;i++)
		for(int j=0;j<=n;j++)
		{
			if(j==0)
			{
				Dp[i][j][0]=0;
				Dp[i][j][1]=(Dp[i-1][j+1][0]+Dp[i-1][j+1][1]+Dp[i-1][j][1])%MOD;
			}
			else
			if(j==n)
			{
				Dp[i][j][0]=(Dp[i-1][j-1][0]+Dp[i-1][j][0])%MOD;
				Dp[i][j][1]=(Dp[i-1][j-1][1]+Dp[i-1][j][1])%MOD;
			}
			else 
			{
				Dp[i][j][0]=(2*Dp[i-1][j][0]+Dp[i-1][j-1][0]+Dp[i-1][j+1][0])%MOD;
				Dp[i][j][1]=(2*Dp[i-1][j][1]+Dp[i-1][j-1][1]+Dp[i-1][j+1][1])%MOD;
			}
		
		}

	for(int i=0;i<=m;i++)
		for(int )	
	
	
	ll res=0;
	
	for(int i=0;i<=n;i++)	
	{
		res=(res+Dp[m][i][1]+MOD)%MOD;
	}
	
	printf("%I64d\n",res);
	return 0;	
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:64:25: error: expected unqualified-id before ')' token
   64 |                 for(int )
      |                         ^
a.cc:64:24: error: expected ';' before ')' token
   64 |                 for(int )
      |                        ^~
      |                        ;
a.cc:64:25: error: expected primary-expression before ')' token
   64 |                 for(int )
      |                         ^
a.cc:64:24: error: expected ';' before ')' token
   64 |                 for(int )
      |                        ^~
      |                        ;
a.cc:71:17: error: 'res' was not declared in this scope
   71 |                 res=(res+Dp[m][i][1]+MOD)%MOD;
      |                 ^~~
a.cc:74:26: error: 'res' was not declared in this scope
   74 |         printf("%I64d\n",res);
      |                          ^~~
Language: C++

#include <iostream>
using namespace std;
int n,a[100005],ans=1,dir;
int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin>>n;
	st=n+1;
	for(int i=1;i<=n;i++){
		cin>>a[i];
		if(st==n+1 && i>1 && a[i]!=a[i-1])st=i;
	}
	dir=(a[st-1]<a[st]);
	for(int i=st+1;i<=n;i++){
		if(a[i-1]==a[i])continue;
		if((a[i-1]<a[i])!=dir){
			ans++;
			while(i<n){
				if(a[i]!=a[i+1]){
					dir=(a[i]<a[i+1]);
					break;
				}
				i++;
			}
		}
	}
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'st' was not declared in this scope; did you mean 'std'?
    8 |         st=n+1;
      |         ^~
      |         std
Language: Java

import java.util.Scanner;

public class SortedArrays {
	public static void main(String[] args) {
		try (Scanner scanner = new Scanner(System.in)) {
			int n = scanner.nextInt();
			int inputNum = scanner.nextInt();
			int cnt = 1;
			State state = State.NONE;
			for (int i = 1; i < n; i++) {
				int beforeNum = inputNum;
				inputNum = scanner.nextInt();
				switch (state) {
				case NONE:
					if (beforeNum < inputNum) {
						state = State.UP;
					}
					if (beforeNum > inputNum) {
						state = State.DOWN;
					}
					break;
				case UP:
					if (beforeNum > inputNum) {
						state = State.NONE;
						cnt++;
					}
					break;
				case DOWN:
					if (beforeNum < inputNum) {
						state = State.NONE;
						cnt++;
					}
					break;
				default:
					break;
				}
			}
			System.out.println(cnt);
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}

	enum State {
		NONE, UP, DOWN
	}
}


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

 #include <stdio.h>
  2 #include <stdlib.h>
  3 
  4 int main(){
  5   int N;
  6   scanf("%d",&N);
  7   int i;
  8   int A[N];
  9   for (i=0;i<N;i++){
 10     scanf("%d",&A[N]);
 11   }
 12   int ans = 0;
 13   int state = 0;//0 none 1 up -1 down
 14   int temp = 0;
 15   for (i=1;i<N;i++){
 16     switch(state){
 17       case 0:
 18         if (A[i]>A[i-1]){
 19           temp = 1;
 20         }
 21         if (A[i]<A[i-1]){
 22           temp = -1;
 23         }
 24         break;
 25       case 1:
 26         if (A[i]<A[i-1]){
 27            temp = -1;
 28            ans ++;
 29         }
 30         break;
 31       case -1:
 32         if (A[1]>A[i-1]){
 33           temp = 1;
 34           ans ++;
 35         }
 36         break;
 37     }
 38     state = temp;
 39   }
 40   printf("%d",ans);
 41   puts("");
 42 }


Compiler output:
main.c:2:3: error: expected identifier or '(' before numeric constant
    2 |   2 #include <stdlib.h>
      |   ^
main.c:2:5: error: stray '#' in program
    2 |   2 #include <stdlib.h>
      |     ^
Language: C++

#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
#define DEBUG(X) cerr<<__LINE__<<" "<<#X<<": "<<X<<endl;
#define sci(x) int x;scanf("%d",&x);
#define scii(x, y) int x,y;scanf("%d%d",&x,&y);
#define REP(i,y) for(int i=0;i<(int)(y);i++)
#define REPP(i,y) for(int i=1;i<=(int)(y);i++)
#define int long long
#define %d %lld
signed main() {
  sci(N);
  sci(A)
  int inc = 2;
  int ans=0;
  REP(i,N-1) {
    const int pA = A;
    scanf("%d",&A);
    if (pA < A) {
      if (inc==0) ans++,inc=2;
      else inc = true;
    }
    else if (pA > A) {
      if (inc==1) ans++,inc=2;
      else inc = false;
    }
    else inc = 2;
  }
  printf("%d\n", ++ans);
}

Compiler output:
a.cc:11:9: error: macro names must be identifiers
   11 | #define %d %lld
      |         ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int compare(int a, int b)
{
	if (a == b)
		return 0;
	else if (a > b)
		return -1;
	else
		return 1;
};
void main()
{
	int N;
	vector<int> a;
	cin >> N;
	int temp;
	for (int i = 0; i < N; i++)
	{
		cin >> temp;
		a.push_back(temp);
	}
	int sub_num = 0;
	int head = 0;
	int tend_flag = 0;
	if (N == 1)
		cout << 1;
	else
	{
		for (int i = 0; i < N - 1; i++)
		{
			if (tend_flag*compare(a[i], a[i + 1]) < 0)
			{
				sub_num++;
				tend_flag = 0;
			}
			else
				tend_flag += compare(a[i], a[i + 1]);
		}
		sub_num++;
		cout << sub_num;
	}
	

}

Compiler output:
a.cc:15:1: error: '::main' must return 'int'
   15 | void main()
      | ^~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
	int n;
	cin>>n;
	if(n<=2) cout<<1<<endl;
	else{
		vector<int> a(2), v(n);
		for(int i=0; i<n; i++) cin>>v[i];
		
		a[0]=v[0];
		a[1]=v[1];
		int i=2, sgn=0;
		if(a[0]<a[1]) sgn=1;
		else if(a[0]>a[1]) sgn=-1;
		while(i<n){
			int ts=0;
			if(a[a.size()-1]<v[i]) ts=1;
			else if(a[a.size()-1]>v[i]) ts=-1;
			
			if(sgn==0){
				a.push_back(v[i]);
				sgn=ts;
				i++;
			}
			else if(sgn==1){
				if(ts>=0){
					a.push_back(v[i]);
					i++;
				}
				else{
					ans++;
					a.empty();
					i++;
					if(i<n){
						a.push_back(v[i-1]);
						a.push_back(v[i]);
					}
					else{
						ans++;
						break;
					}
					i++;
					sgn=0;
					if(a[0]<a[1]) sgn=1;
					else if(a[0]>a[1]) sgn=-1;
				}
			}
			else{
				if(ts<=0){
					a.push_back(v[i]);
					i++;
				}
				else{
					ans++;
					a.empty();
					i++;
					if(i<n){
						a.push_back(v[i-1]);
						a.push_back(v[i]);
					}
					else{
						ans++;
						break;
					}
					i++;
					sgn=0;
					if(a[0]<a[1]) sgn=1;
					else if(a[0]>a[1]) sgn=-1;
				}
			}
		}
		ans+=(a.size()>0);
		cout<<ans<<endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:41: error: 'ans' was not declared in this scope; did you mean 'abs'?
   34 |                                         ans++;
      |                                         ^~~
      |                                         abs
a.cc:35:48: warning: ignoring return value of 'bool std::vector<_Tp, _Alloc>::empty() const [with _Tp = int; _Alloc = std::allocator<int>]', declared with attribute 'nodiscard' [-Wunused-result]
   35 |                                         a.empty();
      |                                         ~~~~~~~^~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:1090:7: note: declared here
 1090 |       empty() const _GLIBCXX_NOEXCEPT
      |       ^~~~~
a.cc:57:41: error: 'ans' was not declared in this scope; did you mean 'abs'?
   57 |                                         ans++;
      |                                         ^~~
      |                                         abs
a.cc:58:48: warning: ignoring return value of 'bool std::vector<_Tp, _Alloc>::empty() const [with _Tp = int; _Alloc = std::allocator<int>]', declared with attribute 'nodiscard' [-Wunused-result]
   58 |                                         a.empty();
      |                                         ~~~~~~~^~
/usr/include/c++/14/bits/stl_vector.h:1090:7: note: declared here
 1090 |       empty() const _GLIBCXX_NOEXCEPT
      |       ^~~~~
a.cc:75:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   75 |                 ans+=(a.size()>0);
      |                 ^~~
      |                 abs
Language: Java

public class Main {

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

		String arrayLength = sc.nextLine();
		String array = sc.nextLine();

		Integer[] intArray = returnIntegerArray(array);
		Boolean isPlus = null;
		int answer = 1;
		for (int i = 1; i < intArray.length; i++) {
			if ((isPlus == null || isPlus) && intArray[i - 1] > intArray[i]) {
				isPlus = false;
				answer++;
			} else if ((isPlus == null || !isPlus) && intArray[i - 1] < intArray[i]) {
				isPlus = true;
				answer++;
			}
		}

		System.out.println(answer);

	}

	private static Integer[] returnIntegerArray(String array) {
		String[] strArray = array.split(" ");
		Integer[] intArray = new Integer[strArray.length];
		for (int i = 0; i < strArray.length; i++) {
			intArray[i] = Integer.parseInt(strArray[i]);

		}
		return intArray;
	}
}


Compiler output:
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		^
  symbol:   class Scanner
  location: class Main
Main.java:4: error: cannot find symbol
		Scanner sc = new Scanner(System.in);
		                 ^
  symbol:   class Scanner
  location: class Main
2 errors
Language: Java

		Scanner sc = new Scanner(System.in);

		String arrayLength = sc.nextLine();
		String array = sc.nextLine();

		Integer[] intArray = returnIntegerArray(array);
		Boolean isPlus = null;
		int answer = 1;
		for (int i = 1; i < intArray.length; i++) {
			if ((isPlus == null || isPlus) && intArray[i] > intArray[i + 1]) {
				isPlus = false;
				answer++;
			} else if ((isPlus == null || !isPlus) && intArray[i] < intArray[i + 1]) {
				isPlus = true;
				answer++;
			}
		}

		System.out.println(answer);

	}

	private static Integer[] returnIntegerArray(String array) {
		String[] strArray = array.split(" ");
		Integer[] intArray = new Integer[strArray.length];
		for (int i = 0; i < strArray.length; i++) {
			intArray[i] = Integer.parseInt(strArray[i]);

		}
		return intArray;
	}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
		Scanner sc = new Scanner(System.in);
		^
  (use --enable-preview to enable unnamed classes)
Main.java:9: error: class, interface, enum, or record expected
		for (int i = 1; i < intArray.length; i++) {
		^
Main.java:9: error: class, interface, enum, or record expected
		for (int i = 1; i < intArray.length; i++) {
		                ^
Main.java:9: error: class, interface, enum, or record expected
		for (int i = 1; i < intArray.length; i++) {
		                                     ^
Main.java:12: error: class, interface, enum, or record expected
				answer++;
				^
Main.java:13: error: class, interface, enum, or record expected
			} else if ((isPlus == null || !isPlus) && intArray[i] < intArray[i + 1]) {
			^
Main.java:15: error: class, interface, enum, or record expected
				answer++;
				^
Main.java:16: error: class, interface, enum, or record expected
			}
			^
Main.java:21: error: class, interface, enum, or record expected
	}
	^
Main.java:26: error: class, interface, enum, or record expected
		for (int i = 0; i < strArray.length; i++) {
		^
Main.java:26: error: class, interface, enum, or record expected
		for (int i = 0; i < strArray.length; i++) {
		                ^
Main.java:26: error: class, interface, enum, or record expected
		for (int i = 0; i < strArray.length; i++) {
		                                     ^
Main.java:29: error: class, interface, enum, or record expected
		}
		^
Main.java:31: error: class, interface, enum, or record expected
	}
	^
14 errors
Language: Java

import java.util.Scanner;

public class ASortedArray {

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

		String arrayLength = sc.nextLine();
		String array = sc.nextLine();

		Integer[] intArray = returnIntegerArray(array);
		Boolean isPlus = null;
		int answer = 1;
		for (int i = 1; i < intArray.length; i++) {
			if ((isPlus == null || isPlus) && intArray[i] > intArray[i + 1]) {
				isPlus = false;
				answer++;
			} else if ((isPlus == null || !isPlus) && intArray[i] < intArray[i + 1]) {
				isPlus = true;
				answer++;
			}
		}

		System.out.println(answer);

	}

	private static Integer[] returnIntegerArray(String array) {
		String[] strArray = array.split(" ");
		Integer[] intArray = new Integer[strArray.length];
		for (int i = 0; i < strArray.length; i++) {
			intArray[i] = Integer.parseInt(strArray[i]);

		}
		return intArray;
	}
}

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

package grandContest013;

import java.util.Scanner;

public class ASortedArray {

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

		String arrayLength = sc.nextLine();
		String array = sc.nextLine();

		Integer[] intArray = returnIntegerArray(array);
		Boolean isPlus = null;
		int answer = 1;
		for (int i = 1; i < intArray.length; i++) {
			if ((isPlus == null || isPlus) && intArray[i] > intArray[i + 1]) {
				isPlus = false;
				answer++;
			} else if ((isPlus == null || !isPlus) && intArray[i] < intArray[i + 1]) {
				isPlus = true;
				answer++;
			}
		}

		System.out.println(answer);

	}

	private static Integer[] returnIntegerArray(String array) {
		String[] strArray = array.split(" ");
		Integer[] intArray = new Integer[strArray.length];
		for (int i = 0; i < strArray.length; i++) {
			intArray[i] = Integer.parseInt(strArray[i]);

		}
		return intArray;
	}
}


Compiler output:
Main.java:5: error: class ASortedArray is public, should be declared in a file named ASortedArray.java
public class ASortedArray {
       ^
1 error
Language: Java

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

		String arrayLength = sc.nextLine();
		String array = sc.nextLine();

		Integer[] intArray = returnIntegerArray(array);
		Boolean isPlus = null;
		int answer = 1;
		for (int i = 1; i < intArray.length; i++) {
			if ((isPlus == null || isPlus) && intArray[i] > intArray[i + 1]) {
				isPlus = false;
				answer++;
			} else if ((isPlus == null || !isPlus) && intArray[i] < intArray[i + 1]) {
				isPlus = true;
				answer++;
			}
		}

		System.out.println(answer);

	}

	private static Integer[] returnIntegerArray(String array) {
		String[] strArray = array.split(" ");
		Integer[] intArray = new Integer[strArray.length];
		for (int i = 0; i < strArray.length; i++) {
			intArray[i] = Integer.parseInt(strArray[i]);

		}
		return intArray;
	}

Compiler output:
Main.java:1: error: unnamed classes are a preview feature and are disabled by default.
	public static void main(String[] args) {
	              ^
  (use --enable-preview to enable unnamed classes)
1 error
Language: Java

import java.io.*;
import java.util.*;

public class P1 {

    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int n = sc.nextInt();
        int [] arr = new int[n];
        for (int i = 0; i < n; i++)
            arr[i] = sc.nextInt();

        int idx = 0;
        int cnt = 0;
        while (idx < n) {
            int inc = idx;
            while (inc + 1 < n) {
                if (arr[inc] > arr[inc + 1])
                    break;
                inc++;
            }

            int dec = idx;
            while (dec + 1 < n) {
                if (arr[dec] < arr[dec + 1])
                    break;
                dec++;
            }
            cnt++;
            idx = Math.max(inc + 1, dec + 1);
        }

        out.println(cnt);
        out.flush();
        out.close();
    }


    static class Scanner {
        StringTokenizer st;
        BufferedReader br;

        public Scanner(InputStream s) {
            br = new BufferedReader(new InputStreamReader(s));
        }

        public Scanner (FileReader f) {br = new BufferedReader(f);}

        public String next() throws IOException {
            while (st == null || !st.hasMoreTokens())
                st = new StringTokenizer(br.readLine());
            return st.nextToken();
        }

        public int nextInt() throws IOException {
            return Integer.parseInt(next());
        }

        public long nextLong() throws IOException {
            return Long.parseLong(next());
        }

        public String nextLine() throws IOException {
            return br.readLine();
        }

        public double nextDouble() throws IOException {
            String x = next();
            StringBuilder sb = new StringBuilder("0");
            double res = 0, f = 1;
            boolean dec = false, neg = false;
            int start = 0;
            if (x.charAt(0) == '-') {
                neg = true;
                start++;
            }
            for (int i = start; i < x.length(); i++)
                if (x.charAt(i) == '.') {
                    res = Long.parseLong(sb.toString());
                    sb = new StringBuilder("0");
                    dec = true;
                } else {
                    sb.append(x.charAt(i));
                    if (dec)
                        f *= 10;
                }
            res += Long.parseLong(sb.toString()) / f;
            return res * (neg ? -1 : 1);
        }

        public boolean ready() throws IOException {
            return br.ready();
        }

    }
}

Compiler output:
Main.java:4: error: class P1 is public, should be declared in a file named P1.java
public class P1 {
       ^
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
     
int n,a[100001],cnt,f;
int s(int i){
 for(int j=i+1;j<n-1;j++) if(a[j]<a[j+1]){f=2;cnt++;return i;}
}
     
int b(int i){
 for(int j=i+1;j<n-1;j++) if(a[j]>a[j+1]){f=0;cnt++;return i;}    
}
     
int main(){
 cin>>n;
 for(int i=0;i<n;i++)cin>>a[i];
     
 for(int i=0;i<n-1;i++){
  if(a[i]>a[i+1]){f=1;i=s(i);
  else if(a[i]<a[i+1]){f=2;i=b(i);}
 }
      
 cout<<cnt+1<<endl;
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:3: error: expected '}' before 'else'
   19 |   else if(a[i]<a[i+1]){f=2;i=b(i);}
      |   ^~~~
a.cc:18:18: note: to match this '{'
   18 |   if(a[i]>a[i+1]){f=1;i=s(i);
      |                  ^
a.cc: In function 'int s(int)':
a.cc:7:1: warning: control reaches end of non-void function [-Wreturn-type]
    7 | }
      | ^
a.cc: In function 'int b(int)':
a.cc:11:1: warning: control reaches end of non-void function [-Wreturn-type]
   11 | }
      | ^
Language: C++

#include<iostream>
#include<vector>
#include<utility>
#include<math.h>

using namespace std;

typedef long long ll;
typedef vector<ll> vi;
typedef vector<vi> vvi;
typedef vector<pair<int, int> > vp;

#define pb push_back
#define mod 1000000007
#define inf 999999999
#define rep(i, n) for(int i = 0; i < (n); i++)
#define For(i, a, n) for(int i = a; i < (n); i++)
#define out(n) cout << n << endl;
#define vut(v) rep(i, v.size()) out(v[i]);

ll a[n];

int main(){
  int n, b;
  cin >> n;

  rep(i, n) {
    cin >> a[i];
  }

  int z = 0;
  int k = 0;
  int d = 0;
  int count = 0;

  rep(i, n) {
    if(a[i] + 1 == a[i + 1]) {
      if(!z) count++;
      z = 1;
      continue;
    }

    if(z) {
      z = 0;
      if(i == n - 2) count++;
      continue;
    }

    if(a[i] - 1 == a[i + 1]) {
      if(!k) count++;
      k = 1;
      continue;
    }

    if(k) {
      k = 0;
      if(i == n - 2) count++;
      continue;
    }

    if(i && a[i] == a[i - 1]) {
      continue;
    }

    if(i == n - 2) {
      count++;
      break;
    }


    if(d) {
      count++;
      d = 0;
    }else {
      d = 1;
    }
  }

  out(count)
}


Compiler output:
a.cc:21:6: error: 'n' was not declared in this scope; did you mean 'yn'?
   21 | ll a[n];
      |      ^
      |      yn
a.cc: In function 'int main()':
a.cc:28:12: error: 'a' was not declared in this scope
   28 |     cin >> a[i];
      |            ^
a.cc:37:8: error: 'a' was not declared in this scope
   37 |     if(a[i] + 1 == a[i + 1]) {
      |        ^
a.cc:49:8: error: 'a' was not declared in this scope
   49 |     if(a[i] - 1 == a[i + 1]) {
      |        ^
a.cc:61:13: error: 'a' was not declared in this scope
   61 |     if(i && a[i] == a[i - 1]) {
      |             ^
Language: C++

#include <iostream>

using namespace std;

int main() {
	int count = 1;
	int x = 0;
    bool p = false;
    bool q = false;

	int n;

	cin >> n;

	int a[100000];
	int b[100000];

	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}

	for (int i = 1; i < n; i++) {
		b[i] = a[i] - a[i - 1];
	}

	for (int i = 1; i < n; i++) {
		if ((x == 0 || x == -1) && b[i] > 0) {
            if(x == 0){
                x = 1;
            }else if(x == -1){
                count++;
                x = 1;
		}
		else if ((x == 0 || x == 1) && b[i] < 0) {
            if(x == 0){
                x = -1;
            }else if(x == 1){
                count++;
                x = -1;
            }
		}
	}

	cout << count << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:45:2: error: expected '}' at end of input
   45 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include<iostream>
#include<vector>
using namespace std;

int main(void){
 int N,tmp,f,a=0;
 vector<int> v;

 cin>>N;
 for(int i=0;i<N;i++){
 cin>>tmp;
 v.push_back(tmp);
 }
 f=v[1]-v[0];
 for(int i=2;i<v.size();i++){
  if(v[i][i-1]!=f){
   a++;
   f=v[i]-v[i-1];
  }
 }
 cout<<a<<endl;
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:10: error: invalid types '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type {aka int}[int]' for array subscript
   16 |   if(v[i][i-1]!=f){
      |          ^
Language: C++

#include <iostream>
#define MAX_N 100000
using namespace std;

int main(void){
  int n, j;
  int a[MAX_N];
  int cnt=0;
  cin >> n;
  for (int i=0; i<n; i++){
    cin >> a[i];
  }
  for (int i=0; i<n; i++){
    if (a[i] != a[i+1]){
      j = i;
      break;
    }
  }
  if (a[j] < a[j+1]){
    for (int i=j; i<n; i++){
      if (a[i] > a[i+1]){
        cnt += 1;
        for (int k = i; k<n; k++){
          if (a[k] < a[k+1]){
            break;
          }
          i=k;
        }
      }
    }
  }
  else if (a[j] > a[j+1]){
    for (int i=j; i<n; i++){
      if (a[i] < a[i+1]){
        cnt += 1;
        for (int k = i; k<n; k++){
          if (a[k] > a[k+1]){}
            break;
          }
          i=k;
        }
      }
    }
  }
  cout << cnt + 1 << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:40:13: error: 'k' was not declared in this scope
   40 |           i=k;
      |             ^
a.cc: At global scope:
a.cc:45:3: error: 'cout' does not name a type
   45 |   cout << cnt + 1 << endl;
      |   ^~~~
a.cc:47:3: error: expected unqualified-id before 'return'
   47 |   return 0;
      |   ^~~~~~
a.cc:48:1: error: expected declaration before '}' token
   48 | }
      | ^
Language: C++

#include<iostream>
#include<vector>
using namespace std;

int main(void){
 int N,tmp,f,a=0;
 vector<int> v;

 cin>>N;
 for(int i=0;i<N;i++){
 cin>>tmp;
 v.push(tmp);
 }
 f=v[1]-v[0];
 if(f==0)a++;
 for(int i=2;i<v.size();i++){
  if((v[i]-v[i-1]>0&&f<0)||(v[i]-v[i-1]<0&&f>0))a++;
  else if(v[i]-v[i-1]==0)a++;
 }
 cout<<a<<endl;
 return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:4: error: 'class std::vector<int>' has no member named 'push'
   12 |  v.push(tmp);
      |    ^~~~
Language: C++

#include<bits/stdc++.h>
#include<unordered_map>
/*
*▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
*    ▀▀       ▀▀▀▀▀▀    ▀     ▀▀▀▀▀▀      ▀    ▀
*   ▀  ▀      ▀         ▀     ▀            ▀  ▀
*  ▀    ▀     ▀ ▀ ▀     ▀     ▀ ▀ ▀         ▀
* ▀ ▀▀▀▀ ▀    ▀         ▀     ▀             ▀
*▀        ▀   ▀         ▀     ▀             ▀
*▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
*/
using namespace std;
void afify()
{
    ios::sync_with_stdio(0);
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}
#define ll long int
#define ld long double
#define loopi(i,intial,n)  for(ll i=ll(intial);i<n;i++)
#define loopj(j,intial,n) for(ll j=ll(intial);j<n;j++)
#define min3(a,b,c) min(a,min(b,c))
#define max3(a,b,c) max(a,max(b,c))
#define all(v) v.begin(),v.end()
///////////////////////////////////////
#define SCD(a) scanf("%d",&a)
#define SCD2(a,b) scanf("%d %d",&a,&b)
#define SCLL(a) scanf("%lld",&a)
#define SCLL2(a,b) scanf("%lld %lld",&a,&b)
#define PRD(a) printf("%d\n",a)
#define PRLL(a) printf("%lld\n",a)
///////////////////////////////////////
typedef vector <int> vi;
typedef vector <ll> vll;
typedef vector <vi> vvi;
typedef vector <vll> vvll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<pii> vpii;
typedef vector<pll> vpll;
typedef vector<vpll> vvpll;
typedef vector<vpii> vvpii;
typedef stringstream ss;
const ll oo = (ll) 1e13;
//freopen("input.txt", "r", stdin);
//freopen("output.txt", "w", stdout);
//ifstream ifs("input.txt");
//ofstream ofs("output.txt");
ll arr[1000005];
int main()
{
   afify();
   int n;
   cin>>n;
   loopi(i,0,n) cin>>arr[i];
   bool test=0;ll res=0;
   loopi(i,0,n){
	   while (i+1<n&&arr[i]<=arr[i+1])
	   {
		   i++;test=1;
	   }
	   if(test){res++;test=0;i++;}
	   while (i+1<n&&arr[i]>=arr[i+1])
	   {
		   i++;test=1;
	   }
	   if(test){res++;test=0;}
   }
   if(n==1){cout<<1<<endl;}
   else {cout<<res<<endl;}


	return 0; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:12: error: expected primary-expression before 'long'
   20 | #define ll long int
      |            ^~~~
a.cc:22:37: note: in expansion of macro 'll'
   22 | #define loopi(i,intial,n)  for(ll i=ll(intial);i<n;i++)
      |                                     ^~
a.cc:57:4: note: in expansion of macro 'loopi'
   57 |    loopi(i,0,n) cin>>arr[i];
      |    ^~~~~
a.cc:20:12: error: expected primary-expression before 'long'
   20 | #define ll long int
      |            ^~~~
a.cc:22:37: note: in expansion of macro 'll'
   22 | #define loopi(i,intial,n)  for(ll i=ll(intial);i<n;i++)
      |                                     ^~
a.cc:59:4: note: in expansion of macro 'loopi'
   59 |    loopi(i,0,n){
      |    ^~~~~
Language: Java

public class Main{
	public static void main(){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int arr[] = new int[n];
		
		for(int i=0; i<n; i++){
			arr[i] = sc.nextInt();
		}
		
		int count =0;
		int prev = arr[0];
		bool flag = true;
		int i=1;
		
		while(i<n){
			if(arr[i] > prev){
				flag = true;
				prev = arr[i];
			}else if(arr[i] < prev){
				flag = false;
				prev = arr[i];	
			}else{
				i++;
				continue;
			}
			i++;
			count++;
		
			for( ;i<n; i++){
				if(flag == true){
					if(arr[i] >= prev)
						prev =  arr[i];
					else{
						prev = arr[i];
						i++;
						break;
					}
				}else{
					if(arr[i] <= prev)
						prev =  arr[i];
					else{
						prev = arr[i];
						i++;
						break;
					}
				}
			}
		}
		System.out.println(count);
	}
}

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
Main.java:13: error: cannot find symbol
		bool flag = true;
		^
  symbol:   class bool
  location: class Main
3 errors
Language: C++

read = lambda: map(int, input().split())
n = int(input())
a = list(read())
cnt = 1
f = 0
for i in range(1, n):
    if a[i] > a[i - 1] and f == -1:
        f = 0
        cnt += 1
    elif a[i] < a[i - 1] and f == 1:
        f = 0
        cnt += 1
    elif a[i] > a[i - 1]:
        f = 1
    elif a[i] < a[i - 1]:
        f = -1
print(cnt)

Compiler output:
a.cc:1:1: error: 'read' does not name a type
    1 | read = lambda: map(int, input().split())
      | ^~~~
Language: Java

import java.util.Scanner;

public class A{
  public static void main(String[] args){
    Scanner s = new Scanner(System.in);
    int n, result;

    n = s.nextInt();
    
    result = devideArray(n);

    System.out.println(result);
   }

  public static int devideArray(int n){
    Scanner s = new Scanner(System.in);
    int[] array = new int[n];
    int count = 1;
    boolean flag = true;
    int updown = 0;

    for(int i = 0;i < n;i++){
      array[i] = s.nextInt();
    }

    for(int i = 0;i < n - 1;i++){
      if(flag){
        if(array[i] - array[i + 1] > 0){
          updown = -1;
          flag = false;
        }else if(array[i] - array[i + 1] < 0){
          updown = 1;
          flag = false;
        }
      }else{
        if(array[i] - array[i + 1] > 0){
          if(updown != -1){
            count++;
            flag = true;
          }
        }
        if(array[i] - array[i + 1] < 0){
          if(updown != 1){
            count++;
            flag = true;
          }
        }
      }
    }

    return count;
  }
}


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

import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Created by shoya on 2017/04/15.
 */
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        int n = sc.nextInt();
        int ans = 0;
        int prev = -1;
        int upFlag = -1;
        for (int i = 0; i < n; i++){
            int curr = sc.nextInt();
            //System.out.printf("Prev %d Curr %d Up %d Ans %d\n", prev, curr, upFlag, ans);
            if (prev == -1) {
                prev = curr;
                continue;
            }
            if (upFlag == -1){
                if (curr > prev)
                    upFlag = 1;
                else if (curr < prev)
                    upFlag = 0;
                prev = curr;
                continue;
            }
            if ((upFlag == 1 && prev > curr) || (upFlag == 0 && prev < curr)){
                ans++;
                prev = curr;
                upFlag = -1;
                continue;
            }
            prev = curr;
        }

        //System.out.printf("Up %d Ans %d\n", upFlag, ans);
        pw.println(ans + 1);
        pw.flush();
        return;
    }

Compiler output:
Main.java:43: error: reached end of file while parsing
    }
     ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n;
	scanf("%d",&n);
	long long nt a[n];
	for(int i=0;i<n;++i){
		scanf("%d",&a[i]);
	}
	int res=1;
	for(int i=1;i<n-1;){
		if(a[i]-a[i-1] < 0 && a[i+1]-a[i]>0 || a[i]-a[i-1] > 0 && a[i+1]-a[i] < 0){
			++res;
			i+=2;

		}
		else ++i;

	}
	printf("%d",res);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:22: error: expected initializer before 'a'
    6 |         long long nt a[n];
      |                      ^
a.cc:8:29: error: 'a' was not declared in this scope
    8 |                 scanf("%d",&a[i]);
      |                             ^
a.cc:12:20: error: 'a' was not declared in this scope
   12 |                 if(a[i]-a[i-1] < 0 && a[i+1]-a[i]>0 || a[i]-a[i-1] > 0 && a[i+1]-a[i] < 0){
      |                    ^
Language: C++

#include <iostream>
#include <cstdio>
#include <vector>
#include <cmath>
#include <cstring>
#include <numeric>
#include <algorithm>
#include <functional>
#include <array>
#include <map>
#include <queue>
#include <limits.h>
#include <set>
#include <stack>
#include <random>
#include <time.h>
#include <complex>
#include <unordered_map>
#include <unordered_set>
#include <intrin.h>
#include <nmmintrin.h>
#define rep(i,s,n) for(int i = (s); (n) > i; i++)
#define REP(i,n) rep(i,0,n)
#define RANGE(x,a,b) ((a) <= (x) && (x) <= (b))
#define DUPLE(a,b,c,d) (RANGE(a,c,d) || RANGE(b,c,d) || RANGE(c,a,b) || RANGE(d,a,b))
#define INCLU(a,b,c,d) (RANGE(a,c,d) && (b,c,d))
#define PW(x) ((x)*(x))
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define MODU 1000000007
#define bitcheck(a,b)   ((a >> b) & 1)
#define bitset(a,b)      ( a |= (1 << b))
#define bitunset(a,b)    (a &= ~(1 << b))
#define MP(a,b) make_pair((a),(b))
#define Manh(a,b) (abs((a).first-(b).first) + abs((a).second - ((b).second))
#define pritnf printf
#define scnaf scanf
#define itn int
#define PI 3.141592653589
//#define Graph vector<vector<int>>

#define izryt bool

using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
template<typename A, size_t N, typename T>
void Fill(A(&array)[N], const T &val) {
	std::fill((T*)array, (T*)(array + N), val);
}

signed main() {
	int n;
	scanf("%d", &n);
	vector<int> num(n);
	REP(i, n) {
		int a;
		scnaf("%d", &num[i]);

	}
	int ans = 1;
	int bef = -1;
	int zou = -1;
	rep(i, 0, n) {
		int cur;
		if (num[i] > bef) cur = 1;
		else if (num[i] < bef) cur = 0;
		else if (num[i] == bef) cur = zou;
		//if (bef == -1) cur = -1;
		if (zou != cur && zou != -1) {
			ans++;
			zou = -1;
			bef = num[i];
		}
		else zou = cur, bef = num[i];
	}
	printf("%d\n", ans);
	return 0;
}

Compiler output:
a.cc:20:10: fatal error: intrin.h: No such file or directory
   20 | #include <intrin.h>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
#include <vector>
#include <algorithm>
 #define ll long long 
using namespace std;
typedef vector<int> VI;
int main() {
	ios::sync_with_stdio(0);
	ll int n;
	cin >> n;
	ll VI A(n);
	for (auto& x : A) cin >> x;
	if (n <= 2) {
		cout << 1;
		return 0;
	}
	ll int sol = 1;
	ll int i = 1;
	while (i < n && A[i] == A[i-1]) ++i;
	if (i >= n-1) {
		cout << 1;
		return 0;
	}
	ll int isup = (A[i] > A[i-1] ? 1 : 0);
	for (; i < n; ++i) {
		if (A[i] == A[i-1]) continue; 
		if (isup && A[i] > A[i-1]) continue; 
		if (!isup && A[i] < A[i-1]) continue;
		++sol;
		++i;
		if (i < n) isup = (A[i] > A[i-1] ? 1 : 0);
	}
	cout << sol;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:15: error: expected initializer before 'A'
   11 |         ll VI A(n);
      |               ^
a.cc:12:24: error: 'A' was not declared in this scope
   12 |         for (auto& x : A) cin >> x;
      |                        ^
a.cc:19:25: error: 'A' was not declared in this scope
   19 |         while (i < n && A[i] == A[i-1]) ++i;
      |                         ^
a.cc:24:24: error: 'A' was not declared in this scope
   24 |         ll int isup = (A[i] > A[i-1] ? 1 : 0);
      |                        ^
Language: C++

#include<bits/stdc++.h>
#define rep(i, n) for(ll i = 0; i < (ll)(n); i++)
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
#define all(x) (x).begin(),(x).end()
#pragma GCC optimize("Ofast")
using namespace std;
typedef long long int ll;
typedef long double ld;
const ll INF=(1LL<<62);
const ld pi=acosl((ld)-1);
const ll mod = 1000000007;
// const ll mod = 1234567;
const int dx[4]={0,1,0,-1};
const int dy[4]={1,0,-1,0};
const int ddx[8]={1,0,-1,-1,-1,0,1,1};
const int ddy[8]={1,1,1,0,-1,-1,-1,0};
#define endn "\n"
#define TO_STRING(VariableName) # VariableName

template <typename T>ostream &operator<<(ostream &out,const vector<T> &v) {rep(i,(int)v.size()-1)cout<<v[i]<<" ";cout<<v[(int)v.size()-1];return out;}
template <typename T1, typename T2>ostream &operator<<(ostream &out, const map<T1, T2> &p) {out << "(" << p.first << ", " << p.second << ")";return out;}
template <typename T1, typename T2>ostream &operator<<(ostream &out, const pair<T1, T2> &p){out << "(" << p.first << ", " << p.second << ")";return out;}
template<class T>void debag(const T &obj){cout<<obj<<endl;}

bool solve(){
  int n,m;cin>>n>>m;
  vector<ll>G[n];
  rep(i,m){
    ll a,b;cin>>a>>b;a--;b--;
    G[a].push_back(b);
    G[b].push_back(a);
  }
  vector<ll>ans;
  set<ll>st;
  int v=0;
  while(1){
    bool isOK=true;
    ans.push_back(v);
    ll u=-1;
    st.insert(v);
    for(auto i:G[v]){
      if(st.find(i)==st.end()){
        isOK=false;
        u=i;
      }
    }
    if(isOK{
      cout<<ans.size()<<endl;
      rep(i,ans.size())ans[i]++;
      cout<<ans<<endl;
      return ans.size()!=1;
    }
    else v=u;
  }

  return false;
}

signed main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cout<<fixed<<setprecision(30);
  solve();
}


Compiler output:
a.cc: In function 'bool solve()':
a.cc:48:12: error: expected ';' before '{' token
   48 |     if(isOK{
      |            ^
      |            ;
a.cc:54:5: error: expected primary-expression before 'else'
   54 |     else v=u;
      |     ^~~~
a.cc:53:6: error: expected ')' before 'else'
   53 |     }
      |      ^
      |      )
   54 |     else v=u;
      |     ~~~~
a.cc:48:7: note: to match this '('
   48 |     if(isOK{
      |       ^
Language: C++

// #pragma GCC target("avx2")
#pragma GCC optimize("O3", "unroll-loops")
 
// #include <bits/extc++.h>
// using namespace __gnu_pbds;
 
#include <bits/stdc++.h>
using namespace std;
 
#define int long long
#define double long double
// template <typename T>
// using pbds_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
using pii = pair<int, int>;
template<typename T>
using prior = priority_queue<T, vector<T>, greater<T>>;
template<typename T>
using Prior = priority_queue<T>;
 
// #define X first
// #define Y second
#define ALL(x) (x).begin(), (x).end()
#define eb emplace_back
#define pb push_back
 
#define fastIO() ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define RANDOM() random_device __rd; \
                 mt19937 __gen = mt19937(__rd()); \
                 uniform_int_distribution<int> __dis(0, 1); \
                 auto rnd = bind(__dis, __gen);
 
const int INF = 1E18;
const int mod = 1E9 + 7;
const int maxn = 1E5 + 5;

vector<int> adj[maxn], vis(maxn, 0);
deque<int> deck;

void dfs(int now, int root) {
    vis[now] = 1;
    for (auto x : adj[now]) {
        if (!vis[x]) {
            vis[x] = 1, dfs(x, root);
            
            if (root == -1) deck.push_front(x);
            else deck.push_back(x);
            
            if (now != root) return;
            else root = -1;
        }
    }
}

int32_t main() {
    fastIO();
    
    int n, m;
    cin >> n >> m;
    
    while (m--) cin >> u >> v, adj[u].eb(v), adj[v].eb(u);
    
    dfs(1);
    
    cout << deck.size() << "\n";
    while (!deck.empty()) {cout << deck.front() << " "; deck.pop_front();}
    
    return 0;
}

Compiler output:
a.cc: In function 'int32_t main()':
a.cc:60:24: error: 'u' was not declared in this scope
   60 |     while (m--) cin >> u >> v, adj[u].eb(v), adj[v].eb(u);
      |                        ^
a.cc:60:29: error: 'v' was not declared in this scope
   60 |     while (m--) cin >> u >> v, adj[u].eb(v), adj[v].eb(u);
      |                             ^
a.cc:62:8: error: too few arguments to function 'void dfs(long long int, long long int)'
   62 |     dfs(1);
      |     ~~~^~~
a.cc:39:6: note: declared here
   39 | void dfs(int now, int root) {
      |      ^~~