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

#include <bits/stdc++.h>

using namespace std;

int f(int n){
	if(n&1)return 3*n+1;
	return n/2;
}

const int N=1e6+6;

int a[N];

int main(){
	int n;
	cin >> n;
	ans=0;
	map<int,int>m;
	a[1]=n;
	m[a[1]]++;
	for(int i=2;i<=N;i++){
		a[i]=f(a[i-1]);
		if(m[a[i]]){
			cout<<i;
			return;
		}
		m[a[i]]++;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   17 |         ans=0;
      |         ^~~
      |         abs
a.cc:25:25: error: return-statement with no value, in function returning 'int' [-fpermissive]
   25 |                         return;
      |                         ^~~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

int f(int n){
	if(n&1)return 3*n+1;
	return n/2;
}

const int N=1e6+6;

int a[N];

int main(){
	int n;
	cin >> n;
	ans=0;
	a[1]=n;
	m[a[1]]++;
	for(int i=2;i<=N;i++){
		a[i]=f(a[i-1]);
		if(m[a[i]]){
			cout<<i;
			return;
		}
		m[a[i]]++;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:9: error: 'ans' was not declared in this scope; did you mean 'abs'?
   17 |         ans=0;
      |         ^~~
      |         abs
a.cc:19:9: error: 'm' was not declared in this scope
   19 |         m[a[1]]++;
      |         ^
a.cc:24:25: error: return-statement with no value, in function returning 'int' [-fpermissive]
   24 |                         return;
      |                         ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  int s;
  cin>>s;  int X;
  vector<int> A;
  int X=s;
  for(int i=1;i<100000000;i++){
    
    if(X%2==0){
      X=X/2;
      A.push_back(X);
      
      for(int j=0;j<X;j++){
        if(A.at(j)==A.at(i-1)){
          cout<<i<<endl;
          return 0;
        }
      }
    }

      
    if(X%2==1){
      X=X*3+1;
      A.push_back(X);
      
      for(int j=0;j<X;j++){
        if(A.at(j)==A.at(i-1)){
          cout<<i<<endl;
          return 0;
        }
       }
    }
  }
}


      
      

    


Compiler output:
a.cc: In function 'int main()':
a.cc:8:7: error: redeclaration of 'int X'
    8 |   int X=s;
      |       ^
a.cc:6:16: note: 'int X' previously declared here
    6 |   cin>>s;  int X;
      |                ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
    int s;
    cin >> s;
    map<int,int>Map;
    for(int i = 0; i < 1000000; i++) {
        if(Map[s] > 0) {
            cout << i+1 << endl;
            return 0;
        }
        Map[s]++;
        else if(s%2 == 0) {
            s/=2;
        }
        else {
            s+=s*3+1;
        }
    }
    cout << s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:9: error: 'else' without a previous 'if'
   13 |         else if(s%2 == 0) {
      |         ^~~~
Language: C++

/**
 * @copyright (c) 2020 Daisuke Hashimoto
 */

#include <bits/stdc++.h>
using namespace std;
using ll = int64_t;
using Pair = pair<int32_t, int32_t>;

// std::cout << std::setprecision(20) << 1.1 << endl;

int32_t f(const int32_t n) {
  return (n % 2 == 0) ? n / 2 : 3 * n + 1;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int32_t s;
  cin >> s;
  int32_t value = s;
  lookup[value] = true;
  int32_t m = -1;
  vector<bool> lookup(1000000 + 1, false);
  for (int32_t i = 2; i < 1000002; ++i) {
    value = f(value);
    if (lookup[value]) {
      m = i;
      break;
    } else {
      lookup[value] = true;
    }
  }
  cout << m << endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:3: error: 'lookup' was not declared in this scope
   23 |   lookup[value] = true;
      |   ^~~~~~
Language: Java

import java.util.*;public class ABC116b {static void solve() {Scanner sc = new Scanner(System.in);int n = sc.nextInt();int n1, n2;List<Integer> list = new ArrayList<>();sc.close();if(n==1) {System.out.println("4");}else {do {if(n%2==1) {n1 = n*3+1;list.add(n1);n = n1;}else if(n%2==0) {n2 = n/2;list.add(n2);n = n2;}}while(n!=1);int res = list.size()+2;System.out.println(res);}}public static void main(String[] args) {solve();}}

Compiler output:
Main.java:1: error: class ABC116b is public, should be declared in a file named ABC116b.java
import java.util.*;public class ABC116b {static void solve() {Scanner sc = new Scanner(System.in);int n = sc.nextInt();int n1, n2;List<Integer> list = new ArrayList<>();sc.close();if(n==1) {System.out.println("4");}else {do {if(n%2==1) {n1 = n*3+1;list.add(n1);n = n1;}else if(n%2==0) {n2 = n/2;list.add(n2);n = n2;}}while(n!=1);int res = list.size()+2;System.out.println(res);}}public static void main(String[] args) {solve();}}
                          ^
1 error
Language: C++

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


int main(){
int N;
cin >> N;
int num[100000000];
num[0] = N;
int i = 1;
while(true){

if(N%2==0){
N/=2;
}
else N=N*3+1;

num[i] = N;
for(int j = 0; j < i; j++){
    if(num[i] == num[j]){
        cout << i << endl;
        return 0;
    }
}


}


Compiler output:
a.cc: In function 'int main()':
a.cc:28:2: error: expected '}' at end of input
   28 | }
      |  ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: C++

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

int main() {
  int s;
  cin >> s;
  vector<bool> done(1000000, false);
  int cnt = 0;
  while (true) {
    cnt++;
    if (done.(s)) {
      cout << cnt << endl;
      break;
    }
    else {
      if (s % 2 == 0) {
        s /= 2;
      }
      else {
        s = 3 * s + 1;
      }
    }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:14: error: expected unqualified-id before '(' token
   11 |     if (done.(s)) {
      |              ^
Language: C

#include<stdio.h>
int main()
{
int a,b,c,d[1000000],i,j;c++
scanf("%d",&a);  
c=0;
i=0;
d[0]=a;
  while(c==0)
  {
  if(d[i]%2==1)  d[i+1]=3*d[i]+1;
  else d[i+1]=d[i]/2;
  i++;
    for(j=0;j<i;++j)
    {
    if(d[j]==d[i+1]) c++;
    }
    
  }

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

Compiler output:
main.c: In function 'main':
main.c:4:29: error: expected ';' before 'scanf'
    4 | int a,b,c,d[1000000],i,j;c++
      |                             ^
      |                             ;
    5 | scanf("%d",&a);
      | ~~~~~
Language: C

#include<stdio.h>

int main(){
	
	
	int a;
	
	scanf("%d", &a);
	
	int visited[100005];
	
	for(int i = 0; i<100005; i++){
		visited[i] = 0;
	}
	int count = 0;
	bool flag = true;
	while(flag == true){
		
		if(visited[a] == 1) break;
		
		if(visited[a] == 0){
			visited[a] = 1;
			count++;
		}
		
		if(a % 2 == 0){
			a = a/2;
		}
		else{
			a = 3*a + 1;
		}
	}
	
	printf("%d\n", count+1);
	
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:16:9: error: unknown type name 'bool'
   16 |         bool flag = true;
      |         ^~~~
main.c:2:1: note: 'bool' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include<stdio.h>
  +++ |+#include <stdbool.h>
    2 | 
main.c:16:21: error: 'true' undeclared (first use in this function)
   16 |         bool flag = true;
      |                     ^~~~
main.c:16:21: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
main.c:16:21: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>

int main(){
	
	
	int a;
	
	scanf("%d", &a);
	
	int visited[100005];
	
	for(int i = 0; i<100005; i++){
		visited[i] = 0;
	}
	int count = 0;
	int flag = true;
	while(flag == true){
		
		if(visited[a] == 1) break;
		
		if(visited[a] == 0){
			visited[a] = 1;
			count++;
		}
		
		if(a % 2 == 0){
			a = a/2;
		}
		else{
			a = 3*a + 1;
		}
	}
	
	printf("%d\n", count+1);
	
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:16:20: error: 'true' undeclared (first use in this function)
   16 |         int flag = true;
      |                    ^~~~
main.c:2:1: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include<stdio.h>
  +++ |+#include <stdbool.h>
    2 | 
main.c:16:20: note: each undeclared identifier is reported only once for each function it appears in
   16 |         int flag = true;
      |                    ^~~~
Language: C

#include<stdio.h>

int main(){
	
	
	int a;
	
	scanf("%d", &a);
	
	int visited[100005];
	
	for(int i = 0; i<100005; i++){
		visited[i] = 0;
	}
	int count = 0;
	while(true){
		
		if(visited[a] == 1) break;
		
		if(visited[a] == 0){
			visited[a] = 1;
			count++;
		}
		
		if(a % 2 == 0){
			a = a/2;
		}
		else{
			a = 3*a + 1;
		}
		printf("%d\n", a);
	}
	
	printf("%d\n", count+1);
	
	return 0;
}


Compiler output:
main.c: In function 'main':
main.c:16:15: error: 'true' undeclared (first use in this function)
   16 |         while(true){
      |               ^~~~
main.c:2:1: note: 'true' is defined in header '<stdbool.h>'; this is probably fixable by adding '#include <stdbool.h>'
    1 | #include<stdio.h>
  +++ |+#include <stdbool.h>
    2 | 
main.c:16:15: note: each undeclared identifier is reported only once for each function it appears in
   16 |         while(true){
      |               ^~~~
Language: C

#include<stdio.h>
#include<algorithm>
#include<vector>

using namespace std;

int main(){
	
	
	int a;
	
	scanf("%d", &a);
	
	int visited[100005];
	
	for(int i = 0; i<100005; i++){
		visited[i] = 0;
	}
	int count = 0;
	while(true){
		
		if(visited[a] == 1) break;
		
		if(visited[a] == 0){
			visited[a] = 1;
			count++;
		}
		
		if(a % 2 == 0){
			a = a/2;
		}
		else{
			a = 3*a + 1;
		}
		printf("%d\n", a);
	}
	
	printf("%d\n", count+1);
//	vector <int> list;
	
	
	
	
	return 0;
}


Compiler output:
main.c:2:9: fatal error: algorithm: No such file or directory
    2 | #include<algorithm>
      |         ^~~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:4:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before '==' token
    4 |    int s,a[1000000],n,x == 0;
      |                         ^~
main.c:7:33: error: expected ';' before ')' token
    7 |    for(int i = 1;i < 1000000,i++){
      |                                 ^
      |                                 ;
main.c:14:18: error: 'x' undeclared (first use in this function)
   14 |    for(int i = 1;x == 0;i++){
      |                  ^
main.c:14:18: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

#include<stdio.h>

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


Compiler output:
a.cc: In function 'int main()':
a.cc:4:25: error: expected initializer before '==' token
    4 |    int s,a[1000000],n,x == 0;
      |                         ^~
a.cc:7:33: error: expected ';' before ')' token
    7 |    for(int i = 1;i < 1000000,i++){
      |                                 ^
      |                                 ;
a.cc:14:18: error: 'x' was not declared in this scope
   14 |    for(int i = 1;x == 0;i++){
      |                  ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define MAX 1000000;

int main(){
  int s,n;
  long int a[1000005];
  cin>>s;
  a[0]=s;
  for(int i=1;i<MAX;i++){
    if(a[0]%2==0){
      a[i]=a[i--]/2;
    }
    else{
      a[i]=3*a[i--]+1;
    }
  }
  for(int i=0;i<MAX;i++){
    for(intj=i+1;j<=MAX;j++){
      if(a[i]==a[j]){
        cout<<j;
        return 0;
      }
    }
  }
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:20: error: expected primary-expression before ';' token
   10 |   for(int i=1;i<MAX;i++){
      |                    ^
a.cc:10:20: error: expected ')' before ';' token
   10 |   for(int i=1;i<MAX;i++){
      |      ~             ^
a.cc:10:21: error: 'i' was not declared in this scope
   10 |   for(int i=1;i<MAX;i++){
      |                     ^
a.cc:18:20: error: expected primary-expression before ';' token
   18 |   for(int i=0;i<MAX;i++){
      |                    ^
a.cc:18:20: error: expected ')' before ';' token
   18 |   for(int i=0;i<MAX;i++){
      |      ~             ^
Language: C++

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

int main(){
  int s,k=0;
  cin >> s;
  vector<int> t(10000000);
  t(0) = s;
  for(int i=1;i<10000000;i++){
    if(t.at(i-1)%2 == 0) t.at(i) = t.at(i-1)/2;
    else t.at(i) = 3*t.at(i-1) +1;
    
    for(int j=0;j<i;j++){
      if(t.at(j) == t.at(i)){
        k = -1;
        break;
      }
      
      if(k == -1){
        cout << i << endl;
        break;
      }
    }
  
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:4: error: no match for call to '(std::vector<int>) (int)'
    8 |   t(0) = s;
      |   ~^~~
a.cc:26:2: error: expected '}' at end of input
   26 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
  int s,k=0;
  cin >> s;
  vector<int> t(10000000);
  t(0) = s;
  for(int i=1;i<10000000;i++){
    if(s.at(i-1)%2 == 0) s.at(i) = s.at(i-1)/2;
    else s.at(i) = 3*s.at(i-1) +1;
    
    for(int j=0;j<i;j++){
      if(s.at(j) == s.at(i)){
        k = -1;
        break;
      }
      
      if(k == -1){
        cout << i << endl;
        break;
      }
    }
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:4: error: no match for call to '(std::vector<int>) (int)'
    8 |   t(0) = s;
      |   ~^~~
a.cc:10:10: error: request for member 'at' in 's', which is of non-class type 'int'
   10 |     if(s.at(i-1)%2 == 0) s.at(i) = s.at(i-1)/2;
      |          ^~
a.cc:10:28: error: request for member 'at' in 's', which is of non-class type 'int'
   10 |     if(s.at(i-1)%2 == 0) s.at(i) = s.at(i-1)/2;
      |                            ^~
a.cc:10:38: error: request for member 'at' in 's', which is of non-class type 'int'
   10 |     if(s.at(i-1)%2 == 0) s.at(i) = s.at(i-1)/2;
      |                                      ^~
a.cc:11:12: error: request for member 'at' in 's', which is of non-class type 'int'
   11 |     else s.at(i) = 3*s.at(i-1) +1;
      |            ^~
a.cc:11:24: error: request for member 'at' in 's', which is of non-class type 'int'
   11 |     else s.at(i) = 3*s.at(i-1) +1;
      |                        ^~
a.cc:14:12: error: request for member 'at' in 's', which is of non-class type 'int'
   14 |       if(s.at(j) == s.at(i)){
      |            ^~
a.cc:14:23: error: request for member 'at' in 's', which is of non-class type 'int'
   14 |       if(s.at(j) == s.at(i)){
      |                       ^~
a.cc:26:2: error: expected '}' at end of input
   26 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main() {
  int s;
  cin >> s;
  int count = 1;
  for(int i = 0; i < 1000000; i++) {
    if(s == 4 || s == 2 || s == 1) {
      cout << count + 3 << endl;
      break;
    }
    if(s == 2
    if(s % 2 == 0) {
      s = s / 2;
      count++;
    } else { 
      s = 3 * s + 1;
      count++;
    }
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:14: error: expected ')' before 'if'
   13 |     if(s == 2
      |       ~      ^
      |              )
   14 |     if(s % 2 == 0) {
      |     ~~        
a.cc:21:3: error: expected primary-expression before '}' token
   21 |   }
      |   ^
Language: C

#include<stdio.h>
int main(){
  int s,n,cnt,d = 0,j;
  int a[100];
  scanf("%d",&s);
  s = n;
  cnt = 0;
  for(int i = 0;i < 100;i++){
    if(n%2 == 0){
      n /= 2;
    }else{
      n = 3*n+1;
    }
    a[i] == n
  }
  j = 0;
  while(d != 1){
    for(int i = j+1;i < 100;i++){
      if(a[j] == a[i]){
        d == 1;
        cnt == i;
        i = 100;
      }
    }
  }
  printf("%d",cnt);
}
        
      
    

Compiler output:
main.c: In function 'main':
main.c:14:14: error: expected ';' before '}' token
   14 |     a[i] == n
      |              ^
      |              ;
   15 |   }
      |   ~
Language: C

#include<stdio.h>

int main() {
   int s;
   scanf("%d", &s);
   for(int i = 0; i < ) {
      if(n % 2 == 0) {
         n = n / 2;
      } else {
         n = 3 * n + 1;
      }
   }
}

Compiler output:
main.c: In function 'main':
main.c:6:23: error: expected expression before ')' token
    6 |    for(int i = 0; i < ) {
      |                       ^
main.c:7:10: error: 'n' undeclared (first use in this function)
    7 |       if(n % 2 == 0) {
      |          ^
main.c:7:10: note: each undeclared identifier is reported only once for each function it appears in
Language: C

#include<stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:31:1: error: expected declaration or statement at end of input
   31 | }
      | ^
Language: C

#include<stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:30:1: error: expected declaration or statement at end of input
   30 | }
      | ^
Language: C

#include<stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:27:12: error: expected ';' before '(' token
   27 |       break();
      |            ^
      |            ;
main.c:30:1: error: expected declaration or statement at end of input
   30 | }
      | ^
Language: C

#include<stdio.h>

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


Compiler output:
main.c: In function 'main':
main.c:12:9: error: expected expression before ')' token
   12 |   while(){
      |         ^
main.c:16:18: error: expected expression before '[' token
   16 |       a[n] = 3 * [n - 1] + 1;
      |                  ^
main.c:27:12: error: expected ';' before '(' token
   27 |       break();
      |            ^
      |            ;
main.c:30:1: error: expected declaration or statement at end of input
   30 | }
      | ^
Language: C++

#include<iostream>
#include<string>
#include<stdio.h>
#include<stdlib.h>
#include <algorithm>
#include <set>
#include<math.h>
#include<vector>
#include<map>
using namespace std;

int main(){
    int s;
    cin >> s;
    int n = s;
    int i = 1;
    m<int,int>m{};
    m[s] = -1;
    while(1){
        if(m[n] == -1)break;
        m[n] = -1;
        if(n%2==0){
            n = n/2;
        }else{
            n = 3*n+1;
        }
    }
    cout << n << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:5: error: 'm' was not declared in this scope
   17 |     m<int,int>m{};
      |     ^
a.cc:17:7: error: expected primary-expression before 'int'
   17 |     m<int,int>m{};
      |       ^~~
Language: C

#include<stdio.h>
int main(void){
  int s,n,a[100];
  scanf("%d",&s);
  for(int i = 1;i <= 100;i++){
    if(i == 1){
      a[i] = s;
    }
    if(i%2 == 0){
      a[i] = i/2;
    }
    if(i%2 == 1){
      a[i] =3*i+1
    }
    for(int i = 1;i < 100;i++){
      for(int j = i+1;j<100;j++){  
       if(a[i]==a[j]){
         n = j;
         break;
       }
      } 
    }
    printf("%d",n);
}



Compiler output:
main.c: In function 'main':
main.c:13:18: error: expected ';' before '}' token
   13 |       a[i] =3*i+1
      |                  ^
      |                  ;
   14 |     }
      |     ~             
main.c:24:1: error: expected declaration or statement at end of input
   24 | }
      | ^
Language: C++

#include <stdio.h>

int main()
{
	long n;
	scanf("%ld", &n);
	a[n + 1];
	b[n + 1];
	long i,j;
	i = 1;
	while (i <= n)
		b[i++] = 0;
	i = 1;
	while (i < n)
	{
		scanf("%ld", &a[i]);
		b[a[i]] += 1;
		i++;
	}
	i = 1;
	while (i <= n)
		printf("%ld\n", b[i++]);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'a' was not declared in this scope
    7 |         a[n + 1];
      |         ^
a.cc:8:9: error: 'b' was not declared in this scope
    8 |         b[n + 1];
      |         ^
Language: C++

#include <bits/stdc++.h>
using namespace std; 
int odd_even(int s){
  if(s%2==0){
      s/=2;
    }else{
      s=3*s+1;
    }
  return s;
}
int main() {
  int s;
  cin >> s;
  int i=0,j,count=0,ans=1;
  vector<int> vec(1000001);
  while(1){
    vec.at(i)=odd_even(s);
    for(j=0;j<=i;j++){
      if(vec.at(i)==vec.at(j){
        goto out;
      }
         }
         i++;
         }
  out:     
  cout << i;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:30: error: expected ')' before '{' token
   19 |       if(vec.at(i)==vec.at(j){
      |         ~                    ^
      |                              )
a.cc:22:10: error: expected primary-expression before '}' token
   22 |          }
      |          ^
Language: C++

#include <bits/stdc++.h>
using namespace std; 
int main() {
  int s;
  cin >> s;
  int i,count=0,ans=1;
  
  while(1){
    ans++;
    if(s%2==0){
      s/=2;
    }else{
      s=3*s+1;
    }
    if(s==4){
      count++;
    }
    if(count==2){
      break;
    }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:21:4: error: expected '}' at end of input
   21 |   }
      |    ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  long long s;
  cin >> s;
  for (int i=2;i<100010;i++) {
    if (s==1) {cout << i+3 <}
    if (s==1||s==2||s==4||s==8) {cout << i+3 << endl;return 0;}
    if (s%2==0) {s=s/2;} else {s=3*s+1;} 
  }
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:29: error: expected primary-expression before '}' token
    8 |     if (s==1) {cout << i+3 <}
      |                             ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
int s;
  cin>>s;
  int ans;
  set<int>p;
  p.insert(s);
  for(int i=1; ;i++){
  if(s%2==0)
    s/=2;
    else
      s=3*s+1;
    ans=i;
    if(!p.count())
      p.insert(s);
    else
      break;
  
  } cout<<ans<<endl;



   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:16: error: no matching function for call to 'std::set<int>::count()'
   15 |     if(!p.count())
      |         ~~~~~~~^~
In file included from /usr/include/c++/14/set:63,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:158,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_set.h:756:9: note: candidate: 'template<class _Kt> decltype (((const std::set<_Key, _Compare, _Alloc>*)this)->std::set<_Key, _Compare, _Alloc>::_M_t._M_count_tr(__x)) std::set<_Key, _Compare, _Alloc>::count(const _Kt&) const [with _Key = int; _Compare = std::less<int>; _Alloc = std::allocator<int>]'
  756 |         count(const _Kt& __x) const
      |         ^~~~~
/usr/include/c++/14/bits/stl_set.h:756:9: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_set.h:750:7: note: candidate: 'std::set<_Key, _Compare, _Alloc>::size_type std::set<_Key, _Compare, _Alloc>::count(const key_type&) const [with _Key = int; _Compare = std::less<int>; _Alloc = std::allocator<int>; size_type = long unsigned int; key_type = int]'
  750 |       count(const key_type& __x) const
      |       ^~~~~
/usr/include/c++/14/bits/stl_set.h:750:7: note:   candidate expects 1 argument, 0 provided
Language: C++

#include <iostream>
#include <set>

using std::int;
using std::cout;
using std::endl;
using std::cin;

int main(){
  int s;
  cin >> s;
  set<int> st;
  int x=s;
  //setの中にあるxの個数が0個の間
  while (st.count(x)==0){
    st.insert(x);//集合の中にxをいれる
    if (x%2==0){
      x/=2;
    }
    else {
      x=x*3+1;
    }
  }
  cout << (st.size()+1) << endl;
}

Compiler output:
a.cc:4:12: error: expected unqualified-id before 'int'
    4 | using std::int;
      |            ^~~
a.cc:4:12: error: expected ';' before 'int'
    4 | using std::int;
      |            ^~~
      |            ;
a.cc:4:12: error: declaration does not declare anything [-fpermissive]
    4 | using std::int;
      |            ^~~
a.cc: In function 'int main()':
a.cc:12:3: error: 'set' was not declared in this scope
   12 |   set<int> st;
      |   ^~~
a.cc:12:3: note: suggested alternatives:
In file included from /usr/include/c++/14/set:63,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_set.h:96:11: note:   'std::set'
   96 |     class set
      |           ^~~
/usr/include/c++/14/set:87:13: note:   'std::pmr::set'
   87 |       using set = std::set<_Key, _Cmp, polymorphic_allocator<_Key>>;
      |             ^~~
a.cc:12:7: error: expected primary-expression before 'int'
   12 |   set<int> st;
      |       ^~~
a.cc:15:10: error: 'st' was not declared in this scope; did you mean 's'?
   15 |   while (st.count(x)==0){
      |          ^~
      |          s
a.cc:24:12: error: 'st' was not declared in this scope; did you mean 's'?
   24 |   cout << (st.size()+1) << endl;
      |            ^~
      |            s
Language: C

#include<stdio.h>
int main(void){
  int a,l[1000000],i;
  scanf("%d",&a);
  l[0]=a;
  while(i=1;i<1000000;i++){
    if(l[i-1]%2==0){
      l[i]=l[i-1]/2;
    }else{
      l[i]=l[i-1]*3-1;
    }
    if(l[i-3]==4&&l[i-2]==2)&&(l[i-1]==1&&l[i]==3){
      break;
    }
  }
  printf("%d",i);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:6:12: error: expected ')' before ';' token
    6 |   while(i=1;i<1000000;i++){
      |        ~   ^
      |            )
main.c:12:31: error: expected identifier before '(' token
   12 |     if(l[i-3]==4&&l[i-2]==2)&&(l[i-1]==1&&l[i]==3){
      |                               ^
Language: Java

import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int s = sc.nextInt();
    ArrayList<Long> list = new ArrayList<Long>();
    list.add(s);
    int ans = 0;
    for(int i = 1; i <= 1000000; i++) {
      if((s % 2) == 0) {
        s /= 2;
      } else {
        s = 3 * s + 1;
      }
      if(list.contains(s)) {
        ans = i + 1;
        break; 
      } else {
        list.add(s);
      }
    }
    System.out.println(ans);
  }
}


Compiler output:
Main.java:8: error: incompatible types: int cannot be converted to Long
    list.add(s);
             ^
Main.java:20: error: incompatible types: int cannot be converted to Long
        list.add(s);
                 ^
Note: Some messages have been simplified; recompile with -Xdiags:verbose to get full output
2 errors
Language: C++

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

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

int main () {
  int s;
  cin >> s;
  int a[300];
  long long i = 2;
  while(1) {
    if(a[s] == s) {
      cout << i;
      break;
    }
    s = f(s);
    a[s] = s;
    i++;
  }
}
    
    


Compiler output:
a.cc:4:7: error: 'n' was not declared in this scope; did you mean 'yn'?
    4 | int f(n) {
      |       ^
      |       yn
a.cc: In function 'int main()':
a.cc:19:10: error: 'f' cannot be used as a function
   19 |     s = f(s);
      |         ~^~~
Language: C++

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

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

int main () {
  int s;
  cin >> s;
  int a = s;
  long long i = 1;
  while(1) {
    i++;
    if(a == f(a)) {
      cout << i;
      break;
    }
    a = f(a);
  }
}
    
    

Compiler output:
a.cc:4:7: error: 'n' was not declared in this scope; did you mean 'yn'?
    4 | int f(n) {
      |       ^
      |       yn
a.cc: In function 'int main()':
a.cc:16:14: error: 'f' cannot be used as a function
   16 |     if(a == f(a)) {
      |             ~^~~
a.cc:20:10: error: 'f' cannot be used as a function
   20 |     a = f(a);
      |         ~^~~
Language: C++

#include<stdio.h>
#include <iostream>
#include<string>
#include<vector>

using namespace std;

int main()
{
	int num;
	int ans;
	bool same = true;
	int cnt = 0;
	vector<int> v;

	cin >> num;

	while (count(v.begin(),v.end(),num)==0) {
		cnt++;

		v.push_back(num);
		if (num % 2 == 0) {
			num = num / 2;
		}
		else {
			num = 3 * num + 1;
		}
	}
	cout << cnt+1;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:16: error: 'count' was not declared in this scope; did you mean 'cnt'?
   18 |         while (count(v.begin(),v.end(),num)==0) {
      |                ^~~~~
      |                cnt
Language: C++

#include<stdio.h>
#include <iostream>
#include<string>
#include<vector>

using namespace std;

int main()
{
	int num;
	int ans;
	bool same = true;
	int cnt = 0;
	vector<int> v;

	cin >> num;

	while (count(v.begin(),v.end(),num)==0) {
		cnt++;

		v.push_back(num);
		
		
		cout << num<<"\n";
		

		if (num % 2 == 0) {
			num = num / 2;
		}
		else {
			num = 3 * num + 1;
		}
		

	}
	cout << cnt+1;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:18:16: error: 'count' was not declared in this scope; did you mean 'cnt'?
   18 |         while (count(v.begin(),v.end(),num)==0) {
      |                ^~~~~
      |                cnt
Language: C++

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

using ll=long long;

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  int s;
  cin >> s;
  int num[1000];
  set<int> ans;
  int ANS = 0;
  rep(i,1000) {
    if(i = 0) num[i] = s;
    else {
      if(num[i]%2==0) num[i] = num[i-1]/2;
      else num[i] = num[i-1]*3+1;
    }
    if(set.count(num[i])){
      ANS = i+1;
      break;
    }
    set.insert(num[i]);
  }
  cout << ANS << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:11: error: expected unqualified-id before '.' token
   22 |     if(set.count(num[i])){
      |           ^
a.cc:26:8: error: expected unqualified-id before '.' token
   26 |     set.insert(num[i]);
      |        ^
Language: C++

#include<stdio.h>
#include <iostream>
#include<string>
#include<vector>

using namespace std;

int main()
{
	int num;
	int ans;
	bool same = true;
	int cnt = 0;
	vector<int> v;

	cin >> num;

	while (true) {

		if (count(v.begin(), v.end(), num) != 0) {
			cout << cnt + 1;
			break;
		}
		
		v.push_back(num);
		
		if (num % 2 == 0) {
			num = num / 2;
		}
		else {
			num = 3 * num + 1;
		}

		
		cnt++;

	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:21: error: 'count' was not declared in this scope; did you mean 'cnt'?
   20 |                 if (count(v.begin(), v.end(), num) != 0) {
      |                     ^~~~~
      |                     cnt
Language: C++

#include<stdio.h>
#include <iostream>
#include<string>
#include<vector>

using namespace std;

int main()
{
	int num;
	int ans;
	bool same = true;
	int cnt = 0;
	vector<int> v;

	cin >> num;

	while (true) {

		cout << num<<"\n";
		if (count(v.begin(), v.end(), num) != 0) {
			cout << cnt + 1;
			break;
		}
		
		v.push_back(num);
		
		if (num % 2 == 0) {
			num = num / 2;
		}
		else {
			num = 3 * num + 1;
		}

		
		cnt++;

	}
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:21: error: 'count' was not declared in this scope; did you mean 'cnt'?
   21 |                 if (count(v.begin(), v.end(), num) != 0) {
      |                     ^~~~~
      |                     cnt
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
int main(){
  int s;
  cin>>s;
  set<int>st;
  int x=s;
  int cnt=0
  st.insert(x);
  while(st.count(x)==0){
   if(x%2==0)x/=2;
    else x=3*x+1;
    cnt++;
  }
  cout<<cnt<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: expected ',' or ';' before 'st'
   10 |   st.insert(x);
      |   ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
int main(){
  int s;
  cin>>s;
  set<int>st;
  int x=s;
  st.insert(x);
  while(st.count(x)==0){
   if(x%2==0)x/=2;
    else x=3*x+1;
  }
  cout<<x<<endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:14:17: error: expected '}' at end of input
   14 |   cout<<x<<endl;
      |                 ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

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


int main(){
    int s;
    cin >> s;

    int m = 1;
    while (true){
        if (s == 4 || s == 2 || s == 1){
            cout << m + 3 << endl;
            return 0;
        }
        s = f(s);
        m++;
        }
    }
}

Compiler output:
a.cc:27:1: error: expected declaration before '}' token
   27 | }
      | ^
Language: C++

#define _GLIBCXX_DEBUG
#include<bits/stdc++.h>
#define rep(i,n) for (int i = 0;i < (n);i++)
#define all(v) v.begin(),v.end()
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
using vl = vector<ll>;
using vvl = vector<vl>;


int main(){
  ll s; cin >> s;
  
  if(s == 4) cout << 4 << endl;
  else{
    for(ll i=1; i < 1000001; i++){
   
    
      if(s % 2 == 0){ s /= 2;}
    
      else s = 3*s+1;
    
    
      if(s == 4){
      
        cout << i+4 << endl;
      
        break;
    }
  }
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:2: error: expected '}' at end of input
   34 | }
      |  ^
a.cc:12:11: note: to match this '{'
   12 | int main(){
      |           ^
Language: C++

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

int main(){
  int A;
  cin >> A;
  int counter=0;
  if(A==1||A==2){
    cout << 4 <<endl;
  }else {
    while(A!=4){
      if(A%2==0){
        A /= 2;
      }else{
        A = A*3+1;
      }
      counter++;
    }
    cout << (counter+4) << endl;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:20:4: error: expected '}' at end of input
   20 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

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

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

int main(){
  int s; cin >> s;
  vector<int> a = {s};
  bool jud =true;
  for(int i=0;jud;i++){
    for(int j=0;j<i;j++){
      if(a.at(i) == a.at(j)){
        cout << i+1 << endl;
        jud =false;
        break;
      }
      if(j==i-1){
        if(a.at(i)%2 == 0){
          a.push_back(a.at(i)/2);
        }
        else{
          a.push_back(3*a.at(i)+1);
        }
      }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:8:23: note: to match this '{'
    8 |   for(int i=0;jud;i++){
      |                       ^
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
  int s; cin >> s;
  vector<int> a = {s};
  bool jud =true;
  for(int i=0;jud;i++){
    for(int j=0;j<i;j++){
      if(a.at(i) == a.at(j)){
        cout << i+1 << endl;
        jud =false;
        break;
      }
      if(j==i-1){
        if(a.at(i)%2 == 0){
          s.push_back(a.at(i)/2);
        }
        else{
          s.push_back(3*a.at(i)+1);
        }
      }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:17:13: error: request for member 'push_back' in 's', which is of non-class type 'int'
   17 |           s.push_back(a.at(i)/2);
      |             ^~~~~~~~~
a.cc:20:13: error: request for member 'push_back' in 's', which is of non-class type 'int'
   20 |           s.push_back(3*a.at(i)+1);
      |             ^~~~~~~~~
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:8:23: note: to match this '{'
    8 |   for(int i=0;jud;i++){
      |                       ^
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main(){
  int s; cin >> s;
  vector<int> a = s;
  bool jud =true;
  for(int i=0;jud;i++){
    for(int j=0;j<i;j++){
      if(a.at(i) == a.at(j)){
        cout << i+1 << endl;
        jud =false;
        break;
      }
      if(j==i-1){
        if(a.at(i)%2 == 0){
          s.push_back(a.at(i)/2);
        }
        else{
          s.push_back(3*a.at(i)+1);
        }
      }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:6:19: error: conversion from 'int' to non-scalar type 'std::vector<int>' requested
    6 |   vector<int> a = s;
      |                   ^
a.cc:17:13: error: request for member 'push_back' in 's', which is of non-class type 'int'
   17 |           s.push_back(a.at(i)/2);
      |             ^~~~~~~~~
a.cc:20:13: error: request for member 'push_back' in 's', which is of non-class type 'int'
   20 |           s.push_back(3*a.at(i)+1);
      |             ^~~~~~~~~
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:8:23: note: to match this '{'
    8 |   for(int i=0;jud;i++){
      |                       ^
a.cc:23:4: error: expected '}' at end of input
   23 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <bits/stdc++.h>
#define rep(i,n) for(long long int i = 0; i < n; i++)
#define print(n) std::cout << n << std::endl
using namespace std;
const int N = 1000000;

int fun(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);

    for (int i = 1; i < N; ++i) {
        s = fun(s);
        auto itr = std::find(a.begin(), a.end();
        if(itr != a.end()){
            print(i+1);
            break;
        }
        a.push_back(s);
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:21:48: error: expected ')' before ';' token
   21 |         auto itr = std::find(a.begin(), a.end();
      |                             ~                  ^
      |                                                )
Language: C++

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

  int N ;
  int ans = 1 ;
  cin >> N ;
  map<int,int> mp ;
  while(1){
    ans++ ;
    if( N%2 == 0 )N /= 2 ;
    else N = 3*N + 1 ;
    mp[N] = mp[N] + 1 ;
    if( mp[N] == 2 ){
      cout << ans << endl;
      return 0 ;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:2: error: expected '}' at end of input
   20 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int a;
  cin >> a;
  set<int> st;
  while(st.count(a) != 0){
    st.insert(a);
    if(a % 2 == 0)
      x /= 2;
    else{
      x = x*3 + 1;
    }
    cout << st.size()+1 << endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:7: error: 'x' was not declared in this scope
   10 |       x /= 2;
      |       ^
a.cc:12:7: error: 'x' was not declared in this scope
   12 |       x = x*3 + 1;
      |       ^
a.cc:16:2: error: expected '}' at end of input
   16 | }
      |  ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

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

int main(){
    vector<int> a(1000000);
    cin >> a[1];

    bool ok = true;
    int pos = -1;
    if(a[1]==4 || a[i] == 1 || a[i] == 2){
        cout << 4 <<endl;
    }else{
        for(int i = 2;i <= 1000000;i++){
            if(a[i-1]%2 == 0){
                a[i] = a[i-1]/2;
            }else{
                a[i] = (a[i-1]) * 3 + 1;
            }
            if(a[i] == 4){
                pos  = i;
                break;
            }
        }
            cout << pos +3<<endl;
    }

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:21: error: 'i' was not declared in this scope
   10 |     if(a[1]==4 || a[i] == 1 || a[i] == 2){
      |                     ^
Language: C++

s=int(input())
a=[s]
i=0
b=0
while b not in a:
    if a[i]%2==0:
        b=a[i]//2
    else:
        b=3*a[i]+1
    a.append(b)
    i+=1
    if a[i]%2==0:
        b=a[i]//2
    else:
        b=3*a[i]+1
print(len(a)+1)

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

#include <stdio.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <cstdlib>
#include <list>
#include <numeric>
#define rep(i,n) for(int i=0;i<n;i++)
#define all(x) (x).begin(),(x).end()
using namespace std;

int a, b = 0, n, k;
string s, t;
//cout<<<<endl;


int main()
{
	cin >> n;
	int t = 1;
  if(n==1||n==2)
    cout<<4<<endl;
  else 
	for (int i = 0; t<1000000; i++)
	{
		if (n == 4)
			break;
		else if (n % 2 == 0)
		{
			n = n / 2; t++;
		}
		else
		{
			n = n * 3 + 1; t++;
		}
	}
  
	cout << t + 3 << endl;
}
	return 0;
}


Compiler output:
a.cc:41:9: error: expected unqualified-id before 'return'
   41 |         return 0;
      |         ^~~~~~
a.cc:42:1: error: expected declaration before '}' token
   42 | }
      | ^
Language: C++

#include <algorithm>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <string>
#include <vector>
#include <utility>
using namespace std;

int f(int n){
    int ret;
    if(n % 2 == 0){
        ret = n / 2;
    }else{
        ret = 3 * n + 1;
    }
    return ret;
}
int main()
{
    int s;
    cin >> s;
    int val = s;
    if(val == 2 || val == 1){
        out << i + 4;
    }
    else{
        for(auto i = 1; i < 1000000; ++i){
            if(val == 4){
                cout << i + 3;
                break;
            }
            val = f(val);
        }
    }
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:25:9: error: 'out' was not declared in this scope
   25 |         out << i + 4;
      |         ^~~
a.cc:25:16: error: 'i' was not declared in this scope
   25 |         out << i + 4;
      |                ^
Language: C++

#include <bits/stdc++.h>
#define INF 1000000000
using namespace std;

int main() {

int n,cnt=1; cin>>n;
  map<int,int> m;
  int tmp=n;
  while(1){
    if(!m.count(tmp)){
      m[tmp]=1;
      if(tmp%2==0)tmp/=2;
      else tmp= tmp*3+1;
      cnt++;
    }
    else {cout<<cnt<<endl;break;}
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:2: error: expected '}' at end of input
   18 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

#include <bits/stdc++.h>
#define INF 1000000000
using namespace std;

int main() {

int n,cnt=1; cin>>n;
  map<int,int> m;
  int tmp=n;
  while(1){
    if(!m.count(tmp)){
      m[tmp]=1;
      if(tmp%2==0)tmp/=2;
      else tmp= tmp*3+1;
      cnt++;
    }
    else cout<<cnt<<endl;break;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:2: error: expected '}' at end of input
   18 | }
      |  ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C

#include<stdio.h>

int main(void)
{
  int count1,count2,s,n,i,f1,fa1,f2,fa2,m;
  scanf("%d",&s);
  f1=s;
  f2=s;
  m=0;
  for(count1=1;count1<=1000000;count1++){
    if(count1==1){
      fa1=f1;
    }
    if(count1%2==0){
      fa1=f1/2;
    }else if(count1%2==1 && count1!=1){
      fa1=3*f1+1;
    }
    f1=fa1;
    for(count2=1;count2<=count1;count2++){
      if(count2==1){
        fa2=f2;
      }
      if(count2%2==0){
        fa2=f2/2;
      }else if(count2%2==1 && count2!=1)){
        fa2=3*f2+1;
      }
      if(fa1==fa2){
        m=count2;
        break;
      }
    }
    if(m!=0){
      break;
    }
  }
  printf("%d\n",m);
  
  return 0;
}
  


Compiler output:
main.c: In function 'main':
main.c:26:41: error: expected statement before ')' token
   26 |       }else if(count2%2==1 && count2!=1)){
      |                                         ^
Language: C

#include<stdio.h>

int main(void)
{
  int count1,count2,s,n,i,f1,fa1,f2,fa2,m;
  scanf("%d",&s);
  f1=s;
  f2=s;
  m=0;
  for(count1=1;count1<=1000000;count1++){
    if(count1%2==0){
      fa1=f1/2;
    }else{
      fa1=3*f1+1;
    }
    f1=fa1;
    for(count2=1;count<=count1;count2++){
      if(count2%2==0){
        fa2=f2/2;
      }else{
        fa2=3*f2+1;
      }
      if(fa1==fa2){
        m=count2;
        break;
      }
    }
  }
  if(m!=0){
      break;
  }
  printf("%d\n",m);
  
  return 0;
}
  


Compiler output:
main.c: In function 'main':
main.c:17:18: error: 'count' undeclared (first use in this function); did you mean 'count2'?
   17 |     for(count2=1;count<=count1;count2++){
      |                  ^~~~~
      |                  count2
main.c:17:18: note: each undeclared identifier is reported only once for each function it appears in
main.c:30:7: error: break statement not within loop or switch
   30 |       break;
      |       ^~~~~
Language: C

#include<stdio.h>

int main(void)
{
  int count1,count2,s,n,i,f1,fa1,f2,fa2,m;
  scanf("%d",&s);
  f1=s;
  f2=s;
  m=0;
  for(count1=1;count1<=1000000;count1++){
    if(count1%2==0){
      fa1=f1/2;
    }else{
      fa1=3*f1+1;
    }
    f=fa;
    for(count2=1;count<=count1;count2++){
      if(count2%2==0){
        fa2=f2/2;
      }else{
        fa2=3*f2+1;
      }
      if(fa1==fa2){
        m=count2;
        break;
      }
    }
  }
  if(m!=0){
      break;
  }
  printf("%d\n",m);
  
  return 0;
}
  

Compiler output:
main.c: In function 'main':
main.c:16:5: error: 'f' undeclared (first use in this function)
   16 |     f=fa;
      |     ^
main.c:16:5: note: each undeclared identifier is reported only once for each function it appears in
main.c:16:7: error: 'fa' undeclared (first use in this function); did you mean 'fa2'?
   16 |     f=fa;
      |       ^~
      |       fa2
main.c:17:18: error: 'count' undeclared (first use in this function); did you mean 'count2'?
   17 |     for(count2=1;count<=count1;count2++){
      |                  ^~~~~
      |                  count2
main.c:30:7: error: break statement not within loop or switch
   30 |       break;
      |       ^~~~~