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

#include <windows.h>
#include <bits/stdc++.h>
using namespace std;
vector<int> t;
int main()
{
	ios::sync_with_stdio(false);
	long long s,ans=-1;
	cin>>s;
	long long x=s;
	t.push_back(x);
	for(int i=2;i<=(0x3f3f3f3f);i++)
	{
		if(x%2)	x=(3*x)+1;
		else	x=x/2;
		t.push_back(x);
	}
	for(int i=1;i<=t.size()+1;i--)
	{
		for(int j=i-1;j>=1;i--)
		{
			if(t[i]==t[j])
			{
				cout<<i;
				return 0;
			}
		}
	}
}


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

#include <windows.h>
#include <bits/stdc++.h>
using namespace std;
vector<int> t;
int main()
{
	ios::sync_with_stdio(false);
	int s,ans=-1;
	cin>>s;
	int x=s;
	t.push_back(x);
	for(int i=2;;i++)
	{
		if(x%2)	x=(3*x)+1;
		else	x=x/2;
		t.push_back(x);
		for(int j=i-1;j>=1;i--)
		{
			if(t[i]==t[j])
			{
				cout<<i;
				return 0;
			}
		}
	}
}


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

#include <iostream>
#include <vector>
#include <cstdio>
#include <queue>

using namespace std;

typedef long long ll;

ll func(ll n)
{
    if(n%2==0)
        return n/2;
    else
        return 3*n+1;
}


int main() {


    ll s;
    cin>>s;

    vector<ll> a;
    a.push_back(0);
    a.push_back(s);
    
    if(s==1 || s==2 || s==4)
    {
        cout<<4<<endl;
        return;
    }
    
    for(ll i=2; i<1000000+1; i++)
    {
        a.push_back(func(a[i-1]));

        if(a[i]==4)
        {
            cout<<i+3<<endl;
            break;
        }

    }


    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:9: error: return-statement with no value, in function returning 'int' [-fpermissive]
   32 |         return;
      |         ^~~~~~
Language: C

#include <stdio.h>

int main(void){
  int a[];
  int s;
  scanf("%d",&s);
  a[1] = s;
    for (int i = 0;;i++){
      if (a[i] % 2 == 0){
        a[i+1] = a[i]/2;
      }else{
        a[i+1] = a[i] * 3 + 1;
      }
      if(a[i+1] == 4){
        printf("%d",&i+1);
        break;
      }
    }
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:7: error: array size missing in 'a'
    4 |   int a[];
      |       ^
Language: C++

#include<iostream>
using namespace std;

int f(int bfr){
    int ret;
    if(bfr%2 == 0){
        ret = bfr / 2;
    }else{
        ret = 3*bfr + 1;
    }
    return(ret);
}

int main(void){
    int res, i;
    int flag = 0;
    int a, old_a;

    cin >> old_a;

    for(i = 1; i < M_NUM; i++){
        a = f(old_a);
        cout << a << endl;

        if(a==4) break;
        old_a = a;
    }
    cout << i+4;
    return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:21:20: error: 'M_NUM' was not declared in this scope
   21 |     for(i = 1; i < M_NUM; i++){
      |                    ^~~~~
a.cc:29:14: error: expected '}' at end of input
   29 |     return 0;
      |              ^
a.cc:14:15: note: to match this '{'
   14 | int main(void){
      |               ^
Language: C++

#include<iostream>
#include <stdlib.h>
#include <algorithm>
#include <string>
#include<vector>
typedef long long int ll;
using namespace std;
int main() {
	int s,num,count,num1;
	cin>>s;
	vector<int> vec={s};
	count=0;
	while(1){
		if(s%2==0){
			s=s/2;
		}else{
			s=3*s+1;
		}
		if((s&(s-1))==0){
			num1=(int)log2(s);
			break;
		}else{
			vec.push_back(s);
		}
	}
	cout<<vec.size()+num1+2 <<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:35: error: 'log2' was not declared in this scope
   20 |                         num1=(int)log2(s);
      |                                   ^~~~
Language: C

#include <stdio.h>

int main(void){
 long int s;
 scanf("%d",&s);

 int i=0;
if(s==1||s==2||s==4){
  printf("4\n");
}else{
while(1){
if(s==4) break;
else{
s=(s%2==0)s/2:s*3+1;
i++;
}}
printf("%d",i+4);
}
return 0;
}

Compiler output:
main.c: In function 'main':
main.c:14:11: error: expected ';' before 's'
   14 | s=(s%2==0)s/2:s*3+1;
      |           ^
      |           ;
Language: C++

#include <bits/stdc++.h> 
using namespace std;
typedef long long ll;
typedef pair<int,int> p;
const int inf=(1<<30);
#define rep(i,a,n)	for(int i=a;i<n;i++)
#define rrep(i,a,n) for(int i=(a-1);i>=n;i--)
	
int main(){
	ll n;
	cin>>n;
	ll a=n,b=n;
	ll ansa=4;
	while(n!=4){
		if(n%2==0)n/=2;
		else n=n*3+1;
		ans++;
	}
	ll ansb=4;
	while(n!=1){
		if(n%2==0)n/=2;
		else n=n*3+1;
		ans++;
	}
	ll ansc=4;
	while(n!=2){
		if(n%2==0)n/=2;
		else n=n*3+1;
		ans++;
	}	
	ans=min(ansa,ansb);
	ans=min(ans,ansc);
	cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:17: error: 'ans' was not declared in this scope; did you mean 'ansa'?
   17 |                 ans++;
      |                 ^~~
      |                 ansa
a.cc:23:17: error: 'ans' was not declared in this scope; did you mean 'ansb'?
   23 |                 ans++;
      |                 ^~~
      |                 ansb
a.cc:29:17: error: 'ans' was not declared in this scope; did you mean 'ansc'?
   29 |                 ans++;
      |                 ^~~
      |                 ansc
a.cc:31:9: error: 'ans' was not declared in this scope; did you mean 'ansc'?
   31 |         ans=min(ansa,ansb);
      |         ^~~
      |         ansc
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a[1000001];
int main()
{
	int s;
	scanf("%d",&s);
	for(int i=0;;i++)
	{
		if(i==0)
			a[i]=s;
		else
		{
			if(a[i-1]%2==0)
				a[i]=a[i-1]/2;
			else
				a[i=a[i-1]*3+1;
			for(int j=0;j<=i-1;j++)
			{
				if(a[j]==a[i])
				{
					printf("%d",i+1);
					return 0;
				}
			}
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:47: error: expected ']' before ';' token
   17 |                                 a[i=a[i-1]*3+1;
      |                                               ^
      |                                               ]
Language: C++

#include<bits/stdc++.h>
using namespace std;
int a[1000001]
int main()
{
	int s;
	scanf("%d",&s);
	for(int i=0;;i++)
	{
		if(i==0)
			a[i]=s;
		else
		{
			if(a[i-1]%2==0)
				a[i]=a[i-1]/2;
			else
				a[i=a[i-1]*3+1;
			for(int j=0;j<=i-1;j++)
			{
				if(a[j]==a[i])
				{
					printf("%d",i+1);
					return 0;
				}
			}
		}
	}
	return 0;
}

Compiler output:
a.cc:4:1: error: expected initializer before 'int'
    4 | int main()
      | ^~~
Language: C

#include <stdio.h>

int main()
{
	int s;
	scanf("%d",&s);
	int a[1000000];
	int a[0]=s;
	int judge=0;
	int ans;
	for (int i = 1; i < 1000000; ++i)
	{
		if(a[i-1]%2==0){
			a[i]=a[i-1]/2;
		}else{
			a[i]=a[i-1]*3+1;
		}
		for (int j = 0; j < i; ++j)
		{
			if(a[i]==a[j]){
				judge++;
			}
		}
		if(judge!=0){
			printf("%d",ans);
			break;
		}
	}
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:8:13: error: conflicting types for 'a'; have 'int[0]'
    8 |         int a[0]=s;
      |             ^
main.c:7:13: note: previous declaration of 'a' with type 'int[1000000]'
    7 |         int a[1000000];
      |             ^
main.c:8:18: error: invalid initializer
    8 |         int a[0]=s;
      |                  ^
Language: C++

#include<iostream>
#include <stdlib.h>
#include <algorithm>
#include <string>
typedef long long int ll;
using namespace std;
int main() {
	int s,num;
	cin>>s;
	vector<int> vec;
	while(1){
		if(s%2==0){
			s=s/2;
		}else{
			s=3*s+1;
		}
		vec.push_back(s);
		sort(vec.begin(),vec.end());
		num=vec.size();
		unique(vec.begin(),vec.end());
		if(num!=vec.size()){
			break;
		}
	}
	cout<<num <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'vector' was not declared in this scope
   10 |         vector<int> vec;
      |         ^~~~~~
a.cc:4:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    3 | #include <algorithm>
  +++ |+#include <vector>
    4 | #include <string>
a.cc:10:16: error: expected primary-expression before 'int'
   10 |         vector<int> vec;
      |                ^~~
a.cc:17:17: error: 'vec' was not declared in this scope
   17 |                 vec.push_back(s);
      |                 ^~~
Language: Java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;

/**
 * メインクラス
 *
 */
public class Main {

	/**
	 * メインメソッド
	 * @param args
	 * @throws IOException
	 */
	public static void main(String[] args) throws IOException {

		// ============================================================
		// 標準入力を変数に設定
		// ============================================================

		// 標準入力を取得
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		long s = Integer.parseInt(br.readLine());

		List<Long> sums = new ArrayList<Long>();

		boolean ok = true;
		long i = 0;
		sums.add(s)
		while (ok) {

			i++;

			s = calc(s, i);

			if (sums.contains(s)) {
				System.out.println(i + 1);
				return;
			} else {
				sums.add(s);
			}

		}

	}

	static long calc(long num, long i) {

		if (num % 2 == 0) {
			return num / 2;

		} else {
			return num * 3 + 1;
		}

	}
}

Compiler output:
Main.java:33: error: ';' expected
		sums.add(s)
		           ^
1 error
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int f(int n){
    if(n%2==0){
        return n/2;
    }else{
        return 3* n + 1;
    }
}

int main(){
    int s;
    cin >> s;
    vector<int> a;
    a.push_back(s);
    int ai=0;
    for(int i=1; i<=1000000; i++){
        ai = f(a[i-1]);
        auto result = find(a.begin(), a.end(), ai);
        if(result == a.end()){
            a.push_back(ai);
        }else{
            cout << i + 1 << endl;
            break;
        }
    }
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:27: error: no matching function for call to 'find(std::vector<int>::iterator, std::vector<int>::iterator, int&)'
   22 |         auto result = find(a.begin(), a.end(), ai);
      |                       ~~~~^~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, const _CharT2&)'
  435 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note:   template argument deduction/substitution failed:
a.cc:22:27: note:   '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' is not derived from 'std::istreambuf_iterator<_CharT>'
   22 |         auto result = find(a.begin(), a.end(), ai);
      |                       ~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

a#include<iostream>
#include<stdbool.h>
using namespace std;

int main(){
    int s;
    int a[1000000];
    bool z[1000000];
    for(int i = 0;i < 1000000 ; i++){
        z[i] = false;
    }
    int buf;
    cin >> s;
    a[0] = s;
    z[s] = true;
    for(int i = 1;i < 1000000 ; i++){
        if(a[i-1]%2==0){
            a[i] = a[i-1] /2;
        }else{
            a[i] = 3*a[i-1] + 1;
        }
        buf = a[i];
		if (z[buf] == true) {
			cout << i+1 << endl;
			return 0;
		}
		else {
			z[buf] = true;
		}
       //cout << a[i] << endl;
    }
    return 0;
}

Compiler output:
a.cc:1:2: error: stray '#' in program
    1 | a#include<iostream>
      |  ^
a.cc:1:1: error: 'a' does not name a type
    1 | a#include<iostream>
      | ^
a.cc: In function 'int main()':
a.cc:13:5: error: 'cin' was not declared in this scope
   13 |     cin >> s;
      |     ^~~
a.cc:24:25: error: 'cout' was not declared in this scope
   24 |                         cout << i+1 << endl;
      |                         ^~~~
a.cc:24:40: error: 'endl' was not declared in this scope
   24 |                         cout << i+1 << endl;
      |                                        ^~~~
Language: C

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
const int N=1000007;
int a[N];
int main()
{
	int s,i,j;
		scanf("%d",&s);
	a[0]=s;
	i=1;
	while(1)
	{
		if(a[i-1]%2==0)
			a[i]=a[i-1]/2;
		else
			a[i]=3*a[i-1]+1;
		for(j=0;j<i;j++)
			if(a[i]==a[j])
			{
				printf("%d",i+1);
				return 0;
			}
		i+=1;
	}
	return 0;
}

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

//ios::sync_with_stdio(false);
//yang@(^_^)
#include <windows.h>
#include <bits/stdc++.h>
using namespace std;
vector<int> t;
int f(int a)
{
	if(a%2==0)	return a/2;
	else 	return (3*a)+1;
}
int main()
{
	ios::sync_with_stdio(false);
	int s,ans;
	cin>>s;
	int x=s;
	t.push_back(x);
	for(int i=2;;i++)
	{
		int flag=0;
		x=f(x);
		t.push_back(x);
		for(int j=i;j>1;j--)
		{
			if(t[i]==t[j])
			{
				ans=i;
				flag=1;
			}
		}
		if(flag=1)	break;
	}
	cout<<ans;
	return 0;
}


Compiler output:
a.cc:3:10: fatal error: windows.h: No such file or directory
    3 | #include <windows.h>
      |          ^~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
 int s;
  cin>>s;
  vector<int> a;
  for(int i=0;i<1000000;i++){
   if(i==0){
   	a.push_back(s);
   }
    else if(i%2==1){
      a.push_back(a.back()/2);
   }
    else if(i%2==0){
     a.push_back(3*a.back()+1); 
   }
  }
  
  for(int i=0;i<1000000;i++){
   for(int j=1;j<1000000-1;j++){
     if(a[i]==a[j])cout<<j;
  }
  }
    
    return 0;
  }
  
  
  
  return 0;
}


Compiler output:
a.cc:33:3: error: expected unqualified-id before 'return'
   33 |   return 0;
      |   ^~~~~~
a.cc:34:1: error: expected declaration before '}' token
   34 | }
      | ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
 int s;
  cin>>s;
  vector<int> a;
  for(int i=0;i<1000000;i++){
   if(i==0){
   	a.push_back(s);
   }
    else if(i%2==1){
      a.push_back(a.back()/2);
   }
    else if(i%2==0){
     a.push_back(3*a.back()+1); 
   }
  }
  
  for(int i=0;i<1000000;i++){
   for(int j=1;j<1000000-1;j++){
     if(v[i]==v[j])cout<<j;
  }
  }
    
    return 0;
  }
  
  
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:9: error: 'v' was not declared in this scope
   24 |      if(v[i]==v[j])cout<<j;
      |         ^
a.cc: At global scope:
a.cc:33:3: error: expected unqualified-id before 'return'
   33 |   return 0;
      |   ^~~~~~
a.cc:34:1: error: expected declaration before '}' token
   34 | }
      | ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
 int s;
  cin>>s;
  bector<int> a;
  for(int i=0;i<1000000;i++){
   if(i==0){
   	a.push_back(s);
   }
    else if(i%2==1){
      a.push_back(a.back()/2);
   }
    else if(i%2==0){
     a.push_back(3*a.back()+1); 
   }
  }
  
  for(int i=0;i<1000000;i++){
   for(int j=1;j<1000000-1;j++){
     if(v[i]==v[j])cout<<j;
  }
  }
    
    return 0;
  }
  
  
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: 'bector' was not declared in this scope
    9 |   bector<int> a;
      |   ^~~~~~
a.cc:9:10: error: expected primary-expression before 'int'
    9 |   bector<int> a;
      |          ^~~
a.cc:12:9: error: 'a' was not declared in this scope
   12 |         a.push_back(s);
      |         ^
a.cc:15:7: error: 'a' was not declared in this scope
   15 |       a.push_back(a.back()/2);
      |       ^
a.cc:18:6: error: 'a' was not declared in this scope
   18 |      a.push_back(3*a.back()+1);
      |      ^
a.cc:24:9: error: 'v' was not declared in this scope
   24 |      if(v[i]==v[j])cout<<j;
      |         ^
a.cc: At global scope:
a.cc:33:3: error: expected unqualified-id before 'return'
   33 |   return 0;
      |   ^~~~~~
a.cc:34:1: error: expected declaration before '}' token
   34 | }
      | ^
Language: C++

#include<iostream>
using namespace std;

int main(){
int s;
  cin >> s;
  for(int i = 0;i < 100; i++;){ 
    cin >> s[i];
  if(s % 2 == 0){
  s = s / 2;
  }
  if(s & 2 == 1){
  s = 3 * s + 1;
  }
  if(s[i] == s[i]){
  cout << i << endl;
  }
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:29: error: expected ')' before ';' token
    7 |   for(int i = 0;i < 100; i++;){
      |      ~                      ^
      |                             )
a.cc:7:30: error: expected primary-expression before ')' token
    7 |   for(int i = 0;i < 100; i++;){
      |                              ^
Language: C++

#include<iostream>
using namespace std;

int main(){
int s;
  cin >> s;
  for(int i = 0,i < 100, i++;){ 
    cin >> s[i];
  if(s % 2 == 0){
  s = s / 2;
  }
  if(s & 2 == 1){
  s = 3 * s + 1;
  }
  if(s[i] == s[i]){
  cout << i << endl;
  }
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:18: error: expected ';' before '<' token
    7 |   for(int i = 0,i < 100, i++;){
      |                  ^~
      |                  ;
a.cc:7:19: error: expected primary-expression before '<' token
    7 |   for(int i = 0,i < 100, i++;){
      |                   ^
a.cc:8:13: error: invalid types 'int[int]' for array subscript
    8 |     cin >> s[i];
      |             ^
a.cc:15:7: error: invalid types 'int[int]' for array subscript
   15 |   if(s[i] == s[i]){
      |       ^
a.cc:15:15: error: invalid types 'int[int]' for array subscript
   15 |   if(s[i] == s[i]){
      |               ^
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int main(){
    int s, i, tmp;
    cin >> s;

    vector< int > L;
    L.push_back(s);
    tmp = s;
    for (i=2; i<1000001; i++){
        if (tmp%2) tmp = 3 * tmp +1;
        else tmp = tmp / 2;
        auto result = std::find(L.begin(), L.end(), tmp);
        if (result != L.end()) break;
        L.push_back(tmp);
    }

    cout << i << '\n';
}

   

Compiler output:
a.cc: In function 'int main()':
a.cc:16:32: error: no matching function for call to 'find(std::vector<int>::iterator, std::vector<int>::iterator, int&)'
   16 |         auto result = std::find(L.begin(), L.end(), tmp);
      |                       ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note: candidate: 'template<class _CharT2> typename __gnu_cxx::__enable_if<std::__is_char<_CharT2>::__value, std::istreambuf_iterator<_CharT> >::__type std::find(istreambuf_iterator<_CharT>, istreambuf_iterator<_CharT>, const _CharT2&)'
  435 |     find(istreambuf_iterator<_CharT> __first,
      |     ^~~~
/usr/include/c++/14/bits/streambuf_iterator.h:435:5: note:   template argument deduction/substitution failed:
a.cc:16:32: note:   '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' is not derived from 'std::istreambuf_iterator<_CharT>'
   16 |         auto result = std::find(L.begin(), L.end(), tmp);
      |                       ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Language: C++

#include<Stdio.h>

int a[1000005];
int main()
{
    long long n,m,i;
    scanf("%lld",&n);
    m=0;
    a[m]=n;
    int flag=1;
    while(1)
    {
       // printf("1\n");
        m++;
        if(n%2==0){
            n=n/2;
            a[m]=n;
        }
        else{
            n=3*n+1;
            a[m]=n;
        }
       for(i=0;i<m;i++)
        if(n==a[i])flag=0;
       if(flag==0)break;
    }

    printf("%lld",m+1);
    return 0;
}


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

#include<Stdio.h>
#include<algorithm>
using namespace std;
int a[1000005];
int main()
{
    long long n,m,i;
    scanf("%lld",&n);
    m=0;
    a[m]=n;
    int flag=1;
    while(1)
    {
       // printf("1\n");
        m++;
        if(n%2==0){
            n=n/2;
            a[m]=n;
        }
        else{
            n=3*n+1;
            a[m]=n;
        }
       for(i=0;i<m;i++)
        if(n==a[i])flag=0;
       if(flag==0)break;
    }

    printf("%lld",m+1);
    return 0;
}


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

#include<iostream>
using namespace std;

int main(){
int s;
  cin >> s;
  for(int i = 0;i < 100;i++;){ cin >> s[i];
  if(s % 2 == 0){
  s = s / 2;
  }
  if(s & 2 == 1){
  s = 3 * s + 1;
  }
  if(s[i] == s[i]){
  cout << i << endl;
  }
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:28: error: expected ')' before ';' token
    7 |   for(int i = 0;i < 100;i++;){ cin >> s[i];
      |      ~                     ^
      |                            )
a.cc:7:29: error: expected primary-expression before ')' token
    7 |   for(int i = 0;i < 100;i++;){ cin >> s[i];
      |                             ^
Language: C++

#include <string>
#include<algorithm>
#include <set>
#include <cmath>
using namespace std;

int main(void){
	ios::sync_with_stdio(false);
	int s, m, i, j, k;
	cin >> s;
	int a[1000000];
	a[0] = s;
	for (i = 1; i < 1000000; i++) {
		if (a[i - 1] % 2 == 0) a[i] = a[i - 1] / 2;
		else a[i] = 3 * a[i - 1] + 1;
		for (j = 0; j < i; j++) {
			if (a[i] == a[j]) {
				k = j;
				break;
			}
		}
	}
	cout << k;
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:14: error: incomplete type 'std::ios' {aka 'std::basic_ios<char>'} used in nested name specifier
    8 |         ios::sync_with_stdio(false);
      |              ^~~~~~~~~~~~~~~
a.cc:10:9: error: 'cin' was not declared in this scope
   10 |         cin >> s;
      |         ^~~
a.cc:5:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    4 | #include <cmath>
  +++ |+#include <iostream>
    5 | using namespace std;
a.cc:23:9: error: 'cout' was not declared in this scope
   23 |         cout << k;
      |         ^~~~
a.cc:23:9: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include<iostream>
using namespace std;

int main(){
int s;
  cin >> s;
  for(int i = 0;i < 100;i++;) cin >> s[i];
  if(s % 2 = 0){
  s = s / 2;
  }
  if(s & 2 = 1){
  s = 3 * s + 1;
  }
  if(s[i] == s[i]){
  cout << i << endl;
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:28: error: expected ')' before ';' token
    7 |   for(int i = 0;i < 100;i++;) cin >> s[i];
      |      ~                     ^
      |                            )
a.cc:7:29: error: expected primary-expression before ')' token
    7 |   for(int i = 0;i < 100;i++;) cin >> s[i];
      |                             ^
a.cc:8:8: error: lvalue required as left operand of assignment
    8 |   if(s % 2 = 0){
      |      ~~^~~
a.cc:11:8: error: lvalue required as left operand of assignment
   11 |   if(s & 2 = 1){
      |      ~~^~~
a.cc:14:8: error: 'i' was not declared in this scope
   14 |   if(s[i] == s[i]){
      |        ^
Language: C++

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

int main() {
    int s;
    int a[1000000];
    cin >> s;

    a[0] = s;
    int i = 0;

    while (true){
        if(s % 2 == 0)
            s = s / 2;
        else
            s = 3 * s + 1;
        a[++i] = s;
        for(int j = 0; j < i; j++) {
            if (a[j] == s) {
                cout << i + 1 << endl;
                return;
            }
        }
    }    
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:17: error: return-statement with no value, in function returning 'int' [-fpermissive]
   21 |                 return;
      |                 ^~~~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
    int a[1000];
    int min = 1000;
    cin >> a[0];
    for (int i=0; i<1000; ++i){
        if (a[i]%2==0) a[i+1]=a[i]/2;
        else a[i+1]=3*a[i]+1;
    }
    for (int i=0; i<1000; ++i){
        for (int j=i+1; j<1000; ++j){
            if (a[j]==a[i]){
                 min = min(j,min);
                 break;
            }
        } 
    }
    cout << min << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:27: error: 'min' cannot be used as a function
   15 |                  min = min(j,min);
      |                        ~~~^~~~~~~
Language: C++

#include <stdio.h>

int main(void){
	int n,s,count=1;
	scanf("%d",&n);
	s=n;
  	if(n==1){ printf("%d",4);break;
    if(n==2) {printf("%d",4);break;}
    if(n==4) {printf("%d",4);break;}
	while(1){
		if(s==1) s=n;
		else if(s%2==0) s=s/2;
		else s=3*s+1;
		if (s==4){
			printf("%d\n",count+4 );
			return 0;
		}
		count++;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:34: error: break statement not within loop or switch
    7 |         if(n==1){ printf("%d",4);break;
      |                                  ^~~~~
a.cc:8:30: error: break statement not within loop or switch
    8 |     if(n==2) {printf("%d",4);break;}
      |                              ^~~~~
a.cc:9:30: error: break statement not within loop or switch
    9 |     if(n==4) {printf("%d",4);break;}
      |                              ^~~~~
a.cc:21:2: error: expected '}' at end of input
   21 | }
      |  ^
a.cc:3:15: note: to match this '{'
    3 | int main(void){
      |               ^
Language: C

#include <stdio.h>
int f(int n)
{
  int re;
  if((n%2) == 0){
    re = n/2;
  else
    re = 3*n+1;
  return re;
}

int main(void)
{
  int s,i=1,j,m=0;
  int a[1000000];
  scanf("%d",&s);
  a[i] = s;i++;
  while(m == 0){
    a[i] = f(a[i-1]);
    for(j=0;j<i;j++){
      if(a[i] == a[j])
        m = i;
    }
  }
  printf("%d",m);
  return 0;
}


Compiler output:
main.c: In function 'f':
main.c:7:3: error: expected '}' before 'else'
    7 |   else
      |   ^~~~
Language: C++

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

int main(){
  int s;
  cin >> s;
  int i = 1;
  int tmp = 0;
  int a[1000001] = 0;
  while(1){
    if(i == 1) a[i] = s;
    else{
      if(a[i-1] % 2 == 0) a[i] = a[i-1]/2;
      else a[i] = 3 * a[i-1] + 1;
      for(int j = 1; j < i; j++){
        if(a[i] == a[j]) tmp = j;
        break;
      }
    }
    if(tmp != 0) break;
    i++;
  }
  cout << tmp << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:20: error: array must be initialized with a brace-enclosed initializer
    9 |   int a[1000001] = 0;
      |                    ^
Language: C++

#include <iostream>
using namespace std;

int main(){
    int a[1000000],min;
    cin >> a[0];
    for (int i=0; i<1000000; ++i){
        if (i%2==1) a[i+1]=n/2;
        else a[i=1]=3*n+1;
    }
    for (int i=0; i<1000000; ++i){
        for (int j=i+1; j<1000000; ++j){
            if (a[j]==a[i]){
                 min = j;
                 break;
            }
        } 
    }
    cout << min << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:28: error: 'n' was not declared in this scope
    8 |         if (i%2==1) a[i+1]=n/2;
      |                            ^
a.cc:9:23: error: 'n' was not declared in this scope
    9 |         else a[i=1]=3*n+1;
      |                       ^
Language: C++

#include <stdio.h>

int main(void){
	int n,s,count=1;
	scanf("%d",&n);
	s=n;
  	if(n==1){ printf("%d",2);break;
    if(n==2) {printf("%d",4);break;}
    if(n==4) {printf("%d",4);break;}
	while(1){
		if(s==1) s=n;
		else if(s%2==0) s=s/2;
		else s=3*s+1;
		if (s==4){
			printf("%d\n",count+4 );
			return 0;
		}
		count++;
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:34: error: break statement not within loop or switch
    7 |         if(n==1){ printf("%d",2);break;
      |                                  ^~~~~
a.cc:8:30: error: break statement not within loop or switch
    8 |     if(n==2) {printf("%d",4);break;}
      |                              ^~~~~
a.cc:9:30: error: break statement not within loop or switch
    9 |     if(n==4) {printf("%d",4);break;}
      |                              ^~~~~
a.cc:21:2: error: expected '}' at end of input
   21 | }
      |  ^
a.cc:3:15: note: to match this '{'
    3 | int main(void){
      |               ^
Language: C++

#include <iostream>
using namespace std;

int main(){
    int a[1000000],min;
    cin >> a[0];
    for (int i=0; i<1000000; ++i){
        if (n%2==0) a[i+1]=n/2;
        else a[i=1]=3*n+1;
    }
    for (int i=0; i<1000000; ++i){
        for (int j=i+1; j<1000000; ++j){
            if (a[j]==a[i]){
                 min = j;
                 break;
            }
        } 
    }
    cout << min << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'n' was not declared in this scope
    8 |         if (n%2==0) a[i+1]=n/2;
      |             ^
Language: C++

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

int main(){
  int a;
  cin >>a;
  if(a==4||a==2||a==1){
    cout << i<< endl;
    return 0;
  }
  int i=1;
  while(true){
    i++;
    if(a%2=0) a=a/2;
    else a=3*a+1;
    if(a==4){
      cout << i<< endl;
      return 0;
    }
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:13: error: 'i' was not declared in this scope
    8 |     cout << i<< endl;
      |             ^
a.cc:14:9: error: lvalue required as left operand of assignment
   14 |     if(a%2=0) a=a/2;
      |        ~^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
  ll s;cin>>s;
  map<ll,ll> mp;
  now=s;
  mp[s]++;
  for(ll i=2;;i++){
    if(now%2==0)now/=2;
    else now=3*now+1;
    if(mp[now]==1){
      cout<<i<<endl;
      return 0;
    }
    mp[now]++;
  }
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'now' was not declared in this scope; did you mean 'pow'?
    7 |   now=s;
      |   ^~~
      |   pow
Language: C++

#include <bits/stdc++.h>

using namespace std;

#define DEBUG(x) cerr<<#x<<": "<<x<<endl;
#define DEBUG_VEC(v) cerr<<#v<<":";for(int i=0;i<v.size();i++) cerr<<" "<<v[i]; cerr<<endl

typedef long long ll;
#define vi vector<int>
#define vl vector<ll>
#define vii vector< vector<int> >
#define vll vector< vector<ll> >
#define vs vector<string>
#define pii pair<int,int>
#define pis pair<int,string>
#define psi pair<string,int>
#define pll pair<ll,ll>
template<class S, class T> pair<S, T> operator+(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first + t.first, s.second + t.second); }
template<class S, class T> pair<S, T> operator-(const pair<S, T> &s, const pair<S, T> &t) { return pair<S, T>(s.first - t.first, s.second - t.second); }
template<class S, class T> ostream& operator<<(ostream& os, pair<S, T> p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
#define X first
#define Y second
#define rep(i,n) for(int i=0;i<(n);i++)
#define rep1(i,n) for(int i=1;i<=(n);i++)
#define rrep(i,n) for(int i=(n)-1;i>=0;i--)
#define rrep1(i,n) for(int i=(n);i>0;i--)
#define REP(i,a,b) for(int i=a;i<b;i++)
#define in(x, a, b) (a <= x && x < b)
#define all(c) c.begin(),c.end()
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 (a>b) { a = b; return 1; } return 0; }
#define UNIQUE(v) v.erase(std::unique(v.begin(), v.end()), v.end());
const ll inf = 1000000001;
const ll INF = 1e18;
const ll MOD = 1000000007;
//const ll MOD = 998244353;
const double pi = 3.14159265358979323846;
#define Sp(p) cout<<setprecision(15)<< fixed<<p<<endl;
int dx[4] = { 1,0, -1,0 }, dy[4] = { 0,1,0,-1 };
int dx2[8] = { 1,1,0,-1,-1,-1,0,1 }, dy2[8] = { 0,1,1,1,0,-1,-1,-1 };
#define fio() cin.tie(0); ios::sync_with_stdio(false);
//#define mp make_pair

int main() {
  int s;
  cin >> s;
  set<int> s;
  int now = s;
  st.insert(s);
  int i = 2;
  while (true) {
    if (now%2) {
      now = 3*now + 1;
    }
    else {
      now = now / 2;
    }
    if (st.count(now)) {
      cout << i << endl;
      return 0;
    }
    st.insert(now);
    i++;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:47:12: error: conflicting declaration 'std::set<int> s'
   47 |   set<int> s;
      |            ^
a.cc:45:7: note: previous declaration as 'int s'
   45 |   int s;
      |       ^
a.cc:49:3: error: 'st' was not declared in this scope; did you mean 's'?
   49 |   st.insert(s);
      |   ^~
      |   s
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
using ll=long long;

int main(){
 int n,count=0,a=0;
 cin >> n;
 vector<int> goal(n),len(n,0);
 rep(i,n) cin >> goal[i];

 while(a<n){
  if(len[a]==goal[a]) i++;
  if(len[a]<goal[a]){
   for(int j=a; j<n; j++){
     if(len[j]<goal[j]) len[j] += 1;
     if(len[j]==goal[j]){ 
       count++;
       break;
     }
   }
  }
 }
  cout << count << endl;
}
  
     
  


Compiler output:
a.cc: In function 'int main()':
a.cc:13:23: error: 'i' was not declared in this scope
   13 |   if(len[a]==goal[a]) i++;
      |                       ^
Language: C++

#include<bits/stdc++.h>
#define rep(i,n) for(int i=0; i<(n); i++)
using namespace std;
using ll=long long;

int main(){
 int n,count=0,a=0;
 cin >> n;
 vector<int> goal(n),len(n,0);
 rep(i,n) cin >> goal[i];

 while(int a<n){
  if(len[a]==goal[a]) i++;
  if(len[a]<goal[a]){
   for(int j=a; j<n; j++){
     if(len[j]<goal[j]) len[j] += 1;
     if(len[j]==goal[j]){ 
       count++;
       break;
     }
   }
  }
 }
  cout << count << endl;
}
  
     
  

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: expected initializer before '<' token
   12 |  while(int a<n){
      |             ^
a.cc:12:13: error: expected ')' before '<' token
   12 |  while(int a<n){
      |       ~     ^
      |             )
a.cc:12:13: error: expected primary-expression before '<' token
Language: C++

#include <algorithm>
#include <bits/stdc++.h>
#include <climits>
#include <cmath>
#include <functional>
#include <iomanip>
#include <math.h>
#include <numeric>
#include <queue>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#define local
//#ifdef local
    #include "dbg-macro/dbg.h"
#endif
//#define hacks
#ifdef hacks
    #include <boost/multiprecision/cpp_int.hpp>
#endif
#define p std::pair
#define ll long long
#define ld long double
#define ull unsigned long long
#define pi std::pair<int, int>
#define stdabs std::abs
#define all(x) (x).begin(), (x).end()
#define rep(i, n) for (unsigned long long i = 0; i < (unsigned long long)(n); ++i)
#define vec std::vector
#define oreq |=
#define npm next_permutation
using namespace std;
std::vector<unsigned ll> genprimevec(const unsigned ll N);
ll extgcd(ll a, ll b, ll& x, ll& y);
ll nCr(ll n, ll r);
void stat();
template <typename T> T fact(T num);
constexpr ll mod = 1000000000 + 7;
int main()
{
    stat();
    int n;
    cin>>n;
    vec<int> h(n);
    rep(i, n) { cin >> h[i]; }
    int ans = 0;
    int ac = 0;
    rep(i, n)
    {
        if (ac >= h[i]) { ac = h[i]; }

        else {
            ans += h[i] - ac;
	    ac=h[i];
        }
    }
    cout<<ans<<endl;
    return 0;
}
ll extgcd(ll a, ll b, ll& x, ll& y)
{
    if (b == 0) {
        x = 1, y = 0;
        return a;
    }
    ll d = extgcd(b, a % b, y, x);
    y -= a / b * x;
    return d;
}


std::vector<unsigned ll> genprimevec(const unsigned ll N)
{
    std::vector<bool> is_prime(N + 1);
    for (unsigned ll i = 0; i <= N; i++) {
        is_prime[i] = true;
    }
    std::vector<unsigned ll> P;
    for (unsigned ll i = 2; i <= N; i++) {
        if (is_prime[i]) {
            for (unsigned ll j = 2 * i; j <= N; j += i) {
                is_prime[j] = false;
            }
            P.emplace_back(i);
        }
    }
    return P;
}

void stat(){
#ifdef local
    rep(i, 2){std::cout << "local enable" << std::endl;
}
#endif
#ifdef hacks
rep(i, 2) { std::cout << "boost enable" << std::endl; }
#endif
}

ll nCr(ll n, ll r)
{
    ll num = 1;
    for (ll i = 1; i <= r; i++) {
        num = num * (n - i + 1) / i;
    }
    return num;
}

template <typename T> T fact(T num)
{
    if (num == 1) { return 1; }
    return num * fact(num - 1);
}


Compiler output:
a.cc:15:14: fatal error: dbg-macro/dbg.h: No such file or directory
   15 |     #include "dbg-macro/dbg.h"
      |              ^~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

#ifdef LOCAL
#define debug(var) cerr << (#var) << " = " << (var) << endl;
#else
#define debug(var)
#endif

void init() {
  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
}

void solve() {
  int n; scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    scanf("%d", a+i);
  }
  sort(a, a+n);
  int ans = 0;
  for (int i = 1; i < n; ++i) {
    if (a[i] != a[i-1]) ++ans;
  }
  printf("%d", ans);
}

int main() {
  init();
  int t = 1; //scanf("%d", &t);
  while (t--) {
    solve();
  }
  return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:18:17: error: 'a' was not declared in this scope
   18 |     scanf("%d", a+i);
      |                 ^
a.cc:20:8: error: 'a' was not declared in this scope
   20 |   sort(a, a+n);
      |        ^
Language: C

#include<stdio.h>
int main()
{
  int N;
  int ans=0;
  int h[100]={};
  scanf("%d",&N);
        for(int i=0;i<N;i++) scanf("%d",&h[i]);
 while(h[]!={})
  {
    for(int i=0;i<N;i++)
    {
      if(h[i]>0)
      {
        for(int j=1;j<N-j;j++)
        {
          if(h[i+j]==0)
          {
            for(int k=i;k<=i+j-1;k++)
            {
              h[k]--;
            }
            ans++;
          }
        }
      }
    }
             
  }
        printf("%d",ans);
      return 0;
      

Compiler output:
main.c: In function 'main':
main.c:9:10: error: expected expression before ']' token
    9 |  while(h[]!={})
      |          ^
main.c:31:7: error: expected declaration or statement at end of input
   31 |       return 0;
      |       ^~~~~~
Language: C

#include<stdio.h>
int main()
{
  int N;
  int ans=0;
  int h[100]={};
  scanf("%d",&N);
        for(int i=0;i<N;i++) scanf("%d",&h[i]);
  do
  {
    for(int i=0;i<N;i++)
    {
      if(h[i]>0)
      {
        for(int j=1;j<N-j;j++)
        {
          if(h[i+j]==0)
          {
            for(int k=i;k<=i+j-1;k++)
            {
              h[k]--;
            }
            ans++;
          }
        }
      }
      
             while(h[]!={})
        printf("%d",ans);
      return 0;
    }

Compiler output:
main.c: In function 'main':
main.c:28:22: error: expected expression before ']' token
   28 |              while(h[]!={})
      |                      ^
main.c:31:5: error: expected declaration or statement at end of input
   31 |     }
      |     ^
main.c:31:5: error: expected declaration or statement at end of input
Language: C++

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

int main(){
  int N;cin>>N;
  #include<bits/stdc++.h>
using namespace std;

int main(){
  int N;cin>>N;
  vector<int> h(N);
  for(int i=0;i<N;i++) cin>>h.at(i);
  sort(h.begin(),h.end());
  int ans=0;
  for(int i=0;i<N;i++){
    int X=h.at(i);
    for(int j=0;j<N;j++) h.at(i)-=X;
    ans+=X;
  }
  cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
    9 | int main(){
      |         ^~
a.cc:9:9: note: remove parentheses to default-initialize a variable
    9 | int main(){
      |         ^~
      |         --
a.cc:9:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:9:11: error: a function-definition is not allowed here before '{' token
    9 | int main(){
      |           ^
a.cc:21:2: error: expected '}' at end of input
   21 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
#define long long ll
using namespace std;

int main() {
  int i,n,x,s=0;
  cin>>n;
  int a[n];
  for(i=0;i<n;i++)
  	cin>>a[i];

  x=a[0];
  
  for(i=1;i<n;i++)
  { 
    if(a[i]>x)
    {
		y=a[i]-x;
      s=s+y;
    } 
  }
  cout<<s;
  
  
  return 0;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:18:17: error: 'y' was not declared in this scope
   18 |                 y=a[i]-x;
      |                 ^
Language: C

#include<stdio.h>
#include<stdlib.h>

int main(void){
  int N;
  int *p;
  
  scanf("%d",&N);
  p = (int *)malloc(sizeof(int)*N);
  
  char s[400;
  gets(s);
  
  int ip=0;		//0<=ip<N
  int i=0;
  int j=0;
  int max=-1;
  int sum=0;
  char *num="\0";
  for(i=0; s[i]!='\0'||ip<N; i++){
    if(s[i]!=' '){
      num[j]=s[i];
      j++;
    }
    else{
      num[j]='\0';
      p[ip]=atoi(num);
      if(p[ip]>max){
        max=p[ip];
      }
      else{
        sum+=(max-p[ip]);
      }
      ip++;
      num="\0";
      j=0;
    }
  }
  
  printf("%d\n",sum);
  
 return 0; 
}

Compiler output:
main.c: In function 'main':
main.c:11:13: error: expected ']' before ';' token
   11 |   char s[400;
      |             ^
      |             ]
main.c:43:1: error: expected declaration or statement at end of input
   43 | }
      | ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  vector<int>vec(N+1);
  for(int i=0; i<N; i++){
    cin >> vec[i];
  }
  vec[N] = 0;
  int ans =0
  for(int i=1; i < N+1; i++){
    if(vec[i] < vec[i-1]){
      ans += vec[i-1] - vec[i];
    }
  }
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:3: error: expected ',' or ';' before 'for'
   13 |   for(int i=1; i < N+1; i++){
      |   ^~~
a.cc:13:16: error: 'i' was not declared in this scope
   13 |   for(int i=1; i < N+1; i++){
      |                ^
Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
int main(){
    int n;
    cin >> n;
    vector<int>a(n);
    for(int i=0; i<n; i++){
        cin >> a[i];
    }
    long long ans=a[0];
    for(int i=1; i<n; i++){
        if(a[i]-a[i-1]>0){
            ans = ans + a[i]-a[i-1]:
        }
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:36: error: expected ';' before ':' token
   15 |             ans = ans + a[i]-a[i-1]:
      |                                    ^
      |                                    ;
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
  int n;
  cin >> n;
  int a[n];
  int m = 0, ans = 1;
  for(int i = 0;i < n;i++){
    cin >> a[i];
    m = max(m,a[i]);
  }
  
  bool b = false;
  for(int i = 1;i <= 100;i++){
    for(int j = 0;j < n;j++){
    if(!b && a[j] >= i) b = true;
    if(b && a[j] < i){
      b = false;
      ans++;
    }
  }
  
  cout << ans << endl;
  return 0;
}
      
    

Compiler output:
a.cc: In function 'int main()':
a.cc:27:2: error: expected '}' at end of input
   27 | }
      |  ^
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <fstream>
#include <string>
#include <math.h>
#include <cstdlib>
#include <istream>
#include <sstream>
#include <cctype>
#include <iomanip>
//cout << fixed << setprecision(20) << *** << endl;
#define rep(i,N) for(int i=0;i<(int)N;++i)
typedef long long ll;
using namespace std;

bool main()
{
	ll N,ANS=0;
	bool F=false;
	vector<ll> V;
	vector<vector<ll>>VV;
	cin>>N;
	rep(i,N){
		ll t;
		cin>>t;
		V.push_back(t);
	}
	rep(i,101){
		vector<ll>m;
		rep(j,V.size()){
			if(i<V[j])m.push_back(1);
			else m.push_back(0);
		}
		VV.push_back(m);
	}
	rep(i,VV.size()-1){
		rep(j,VV[i].size()-1){
			if(VV[i][j]==1&&j==0)ANS++;
			if(VV[i][j]==0&&VV[i][j+1]==1)ANS++;
		}
	}
	cout<<ANS<<endl;
}

Compiler output:
a.cc:19:1: error: '::main' must return 'int'
   19 | bool main()
      | ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
const ll mod=1000000007;
const int MAX_N = 1000;         // n の最大値

// nCk を取得
void f(int res , string s){
     if(res==0){
       cout << s << endl;}
   else{
     for(char c='a'; c<='c'; c++){
        f(res -1, s + c);}
   }
}
double nCk(int n, int k) {
double res=1.0;
for(int i=0; i<n; i++){
res*=0.5;}
for(int i=0; i<k; i++){
res*=(double)(n-i);
res/=(double)(k-i);
}
return res;}

int main() {
int N;
cin>>N;
int a[N]={};
int ca=0;
int d=0;
int u=0;
int ma=0;
int mi=0;
for(int i=0; i<N; i++){
cin>>a[i];
for(int i=0; i<N-1; i++){
if(a[i]>a[i+1]){
u++;
break;}}
if(u==0){
cout<<a[N-1]<<endl;}
else{
for(int i=0; i<N-1; i++){
ma=max(ma,a[i]);
mi=min(mi,a[i]);
if(d==0&&a[i]>a[i+1]){
ca+=ma-mi;
d++;
ma=a[i+1];
mi=a[i+1];}
else if(a[i]<a[i+1]){
d=0;}}
if(a[N-2]<a[N-1]){
ca+=a[N-1]-a[N-2];}
cout<<ca<<endl;}}


Compiler output:
a.cc: In function 'int main()':
a.cc:57:18: error: expected '}' at end of input
   57 | cout<<ca<<endl;}}
      |                  ^
a.cc:27:12: note: to match this '{'
   27 | int main() {
      |            ^
Language: C++

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

int main(){
  int n;
  cin>>n;
  vector<int>h(n);
  int ans=0,active=0;
  for(int i=0;i<n;i++){
    cin>>h[i];
  }
  for(int i=0;i<n;i++){
    if(active>=h[i]){
      atcive=h[i];
    }
    else{
      ans+=h[i]-active;
      active=h[i];
    }
  }
  cout<<ans<<endl;
}

  

Compiler output:
a.cc: In function 'int main()':
a.cc:14:7: error: 'atcive' was not declared in this scope; did you mean 'active'?
   14 |       atcive=h[i];
      |       ^~~~~~
      |       active
Language: C++

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

ans = 0
pre = 0
for i in h:
    if pre < i:
        ans += i-pre

    pre = i

print(ans)


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