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

int main()
{
  unsigned int m, n;
  std::cin >> m;
  std::cin >> n;

  m = std::pow(m, n);

  std::cout << (m % 1000000007) << std::endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:4:8: error: 'cin' is not a member of 'std'
    4 |   std::cin >> m;
      |        ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | int main()
a.cc:5:8: error: 'cin' is not a member of 'std'
    5 |   std::cin >> n;
      |        ^~~
a.cc:5:8: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:7:12: error: 'pow' is not a member of 'std'
    7 |   m = std::pow(m, n);
      |            ^~~
a.cc:9:8: error: 'cout' is not a member of 'std'
    9 |   std::cout << (m % 1000000007) << std::endl;
      |        ^~~~
a.cc:9:8: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:41: error: 'endl' is not a member of 'std'
    9 |   std::cout << (m % 1000000007) << std::endl;
      |                                         ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | int main()
Language: C++

#include  <iostream>

int main()
{
  unsigned int m, n;
  std::cin >> m;
  std::cin >> n;
 
  m = std::pow(m, n);
 
  std::cout << (m % 1000000007) << std::endl;
 
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: 'pow' is not a member of 'std'
    9 |   m = std::pow(m, n);
      |            ^~~
Language: C++

#include  <iostream>
#incldue  <cmath>

int main()
{
  unsigned int m, n;
  std::cin >> m;
  std::cin >> n;
 
  m = std::pow(m, n);
 
  std::cout << (m % 1000000007) << std::endl;
 
  return 0;
}


Compiler output:
a.cc:2:2: error: invalid preprocessing directive #incldue; did you mean #include?
    2 | #incldue  <cmath>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:10:12: error: 'pow' is not a member of 'std'
   10 |   m = std::pow(m, n);
      |            ^~~
Language: C++

#include <iostream>using namespace std;bool rec(long long x, long long y){    if(y == 0) return x;    else if(y%2 == 1) {return rec(x*x, y/2)*x%1000000007;}    else {return rec(x*x%1000000007, y/2);}}int main(){    long long m,n;    cin >> m >> n;    cout << rec(m, n)<<endl;    return 0;}


Compiler output:
a.cc:1:26: warning: extra tokens at end of #include directive
    1 | #include <iostream>using namespace std;bool rec(long long x, long long y){    if(y == 0) return x;    else if(y%2 == 1) {return rec(x*x, y/2)*x%1000000007;}    else {return rec(x*x%1000000007, y/2);}}int main(){    long long m,n;    cin >> m >> n;    cout << rec(m, n)<<endl;    return 0;}
      |                          ^~~~~~~~~
a.cc:1:10: fatal error: iostream>usin: No such file or directory
    1 | #include <iostream>using namespace std;bool rec(long long x, long long y){    if(y == 0) return x;    else if(y%2 == 1) {return rec(x*x, y/2)*x%1000000007;}    else {return rec(x*x%1000000007, y/2);}}int main(){    long long m,n;    cin >> m >> n;    cout << rec(m, n)<<endl;    return 0;}
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream>using namespace std;
bool rec(long long x, long long y){    if(y == 0) return x;    if(y%2 == 1) {return rec(x*x, y/2)*x%1000000007;}    else {return rec(x*x%1000000007, y/2);}}
int main(){    long long m,n;    cin >> m >> n;    cout << rec(m, n)<<endl;    return 0;}


Compiler output:
a.cc:1:26: warning: extra tokens at end of #include directive
    1 | #include <iostream>using namespace std;
      |                          ^~~~~~~~~
a.cc:1:10: fatal error: iostream>usin: No such file or directory
    1 | #include <iostream>using namespace std;
      |          ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <iostream> using namespace std;#define M 1000000007int rec(int m, int n) {    if(n == 1) return m % M;    long long m2 = rec((m % M) * (m % M), n / 2);    if(n % 2 == 1) {        m2 = (m2 * (m % M));    }


Compiler output:
a.cc:1:21: warning: extra tokens at end of #include directive
    1 | #include <iostream> using namespace std;#define M 1000000007int rec(int m, int n) {    if(n == 1) return m % M;    long long m2 = rec((m % M) * (m % M), n / 2);    if(n % 2 == 1) {        m2 = (m2 * (m % M));    }
      |                     ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream> using namespace std;#define M 1000000007int rec(int m, int n) {    if(n == 1) return m % M;    long long m2 = rec((m % M) * (m % M), n / 2);    if(n % 2 == 1) {        m2 = (m2 * (m % M));    }    return m2 % M;}int main(){   int m,n;   cin >> m >> n;   cout << rec(m, n)<<endl;   return 0;}


Compiler output:
a.cc:1:21: warning: extra tokens at end of #include directive
    1 | #include <iostream> using namespace std;#define M 1000000007int rec(int m, int n) {    if(n == 1) return m % M;    long long m2 = rec((m % M) * (m % M), n / 2);    if(n % 2 == 1) {        m2 = (m2 * (m % M));    }    return m2 % M;}int main(){   int m,n;   cin >> m >> n;   cout << rec(m, n)<<endl;   return 0;}
      |                     ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

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

typedef long long ll;

ll pow_ans(ll x, int n) {
    ll res = 1;
    while (n > 0) {
        if (n & 1) { res *= x;}
        x *= x;
        n >>= 1;
    }
    return res;
}

int main() {
    ll x;
    int y;
    cin >> x >> y;
    cout << pow_ans(x, y) << endl;
}


Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc: In function 'int main()':
a.cc:19:5: error: 'cin' was not declared in this scope
   19 |     cin >> x >> y;
      |     ^~~
a.cc:20:5: error: 'cout' was not declared in this scope
   20 |     cout << pow_ans(x, y) << endl;
      |     ^~~~
a.cc:20:30: error: 'endl' was not declared in this scope
   20 |     cout << pow_ans(x, y) << endl;
      |                              ^~~~
Language: C++

#include<iostream>
#include<cmath>

using namespace std;

typedef unsigned long long ullong;

ullong power(ullong x, ullong n, ullong M) {
  ullong res = 1;
  if (n > 0) {
    res = power(x, n / 2, m);
    if (n % 2 == 0) {
      res = (res * res) % M;
    } else {
      res = (((res * res) % M) * x) % M;
    }
  }
  return res;
}

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

  cout << power(m, n, 1000000007) << endl;

  return 0;
}



Compiler output:
a.cc: In function 'ullong power(ullong, ullong, ullong)':
a.cc:11:27: error: 'm' was not declared in this scope
   11 |     res = power(x, n / 2, m);
      |                           ^
Language: C++

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

// mod * mod が long long に収まらない場合，
// 足し算でオーバーフローを避けてO(log b)で計算する
LL mul_mod(LL a, LL b, LL mod){
    if(b == 0) return 0;
    LL res = mul_mod((a + a) % mod, b / 2, mod);
    if(b & 1) res = (res + a) % mod;
    return res;
}

// aのb乗をO(log b)で計算する
LL pow_mod(LL a, LL b, LL mod){
    if(b == 0) return 1;
    LL res = pow_mod(a * a % mod, b / 2, mod);
    if(b & 1) res = res * a % mod;
    return res;
}

// a * b % mod == 1 をみたすbを計算する．
// modが素数のときは b = a ^ (m - 2)でも計算できる
LL inv_mod(LL a, LL mod){
    LL x, y;
    extgcd(a, mod, x, y);
    return (x % mod + mod) % mod;
}

// 素数pを法とする，1..nの逆元のリストを求める O(n)
vector<LL> inverse_list(int n, int p){
    vector<LL> inv(n + 1);
    inv[1] = 1;
    for (int i = 2; i <= n; ++i){
        inv[i] = inv[p % i] * (p - p / i) % p;
    }
    return inv;
}
int main(){
LL a, b;
cin >> a >> b;
cout << pow_mod(a, b, 1000000007) << endl;
}

Compiler output:
a.cc: In function 'LL inv_mod(LL, LL)':
a.cc:26:5: error: 'extgcd' was not declared in this scope
   26 |     extgcd(a, mod, x, y);
      |     ^~~~~~
Language: Java

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

public class LCM {
	public static int numint[];
	public static int multiplied[];
	public static void main(String[] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str=br.readLine();
		String count=str;
		str=br.readLine();
		String numstr[]=str.split(" ",0);
		new numint[count-1];
		for (int i=1;i<=count;i++){
			numint[i-1]=Intager.parseInt(numstr[i-1]);
		}
		new multiplied[count-1];
		multiplied[0]=numint[0];
		for(int j=1;j<=count;j++){
			multiplied[j]=multiplied[j-1]*numint[j]/Euclid(j-1);
		}
		System.println(multiplied[count]);
		
	}
	public static int Euclid(int k){
		int x=multiplied[k];
		int y=numint[k+1];
		while (x!=y){
			if (x<y){
				y=y-x;
			}else{
				x=x-y;
			}
		}
		return x;
	}
}

Compiler output:
Main.java:14: error: not a statement
		new numint[count-1];
		^
Main.java:18: error: not a statement
		new multiplied[count-1];
		^
2 errors
Language: Java

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

public class LCM {
	public static int numint[];
	public static int multiplied[];
	public static void main(String[] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str=br.readLine();
		String countstr=str;
		int countint=Integer.parseInt(countstr);
		str=br.readLine();
		String numstr[]=str.split(" ",0);
		new numint[countint-1];
		for (int i=1;i<=count;i++){
			numint[i-1]=Integer.parseInt(numstr[i-1]);
		}
		new multiplied[countint-1];
		multiplied[0]=numint[0];
		for(int j=1;j<=count;j++){
			multiplied[j]=multiplied[j-1]*numint[j]/Euclid(j-1);
		}
		System.println(multiplied[count]);
		
	}
	public static int Euclid(int k){
		int x=multiplied[k];
		int y=numint[k+1];
		while (x!=y){
			if (x<y){
				y=y-x;
			}else{
				x=x-y;
			}
		}
		return x;
	}
}

Compiler output:
Main.java:15: error: not a statement
		new numint[countint-1];
		^
Main.java:19: error: not a statement
		new multiplied[countint-1];
		^
2 errors
Language: Java

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

public class LCM {
	public static int numint[];
	public static int multiplied[];
	public static void main(String[] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str=br.readLine();
		String countstr=str;
		int countint=Integer.parseInt(countstr);
		str=br.readLine();
		String numstr[]=str.split(" ",0);
		numint=new int [countint-1];
		for (int i=1;i<=countint;i++){
			numint[i-1]=Integer.parseInt(numstr[i-1]);
		}
		multiplied=new int [countint-1];
		multiplied[0]=numint[0];
		for(int j=1;j<=countint;j++){
			multiplied[j]=multiplied[j-1]*numint[j]/Euclid(j-1);
		}
		System.out.println(multiplied[countint]);
		
	}
	public static int Euclid(int k){
		int x=multiplied[k];
		int y=numint[k+1];
		while (x!=y){
			if (x<y){
				y=y-x;
			}else{
				x=x-y;
			}
		}
		return x;
	}
}

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

#include<iostream>
#include<stdio.h>
#include<string.h>
#include<cstdio>
#include<stack>
#include<queue>
#include<vector>
#include<cstring>
#include<string>
#include<cmath>
#include<iterator>
#include<cstdlib>
#include<set>
#include<algorithm>
#include<map>

#define PI acos(-1.0)

using namespace std;

int gcd(int a, int b)
{
    int i;
    for(i = min(a, b); i >= 1; i--){
        if((a%i == 0) && (b % i == 0)){
            return i;
        }
    }
}
int main()
{
    int n, ara[13], i, j, g, l,a,b;
    while(scanf("%d", &n) == 1){
        for(i = 0; i < n; i++){
            scanf("%d", &ara[i]);
        }
        i = 0;
        a = ara[i];
        b = ara[i+1];
        while(i < n-1){
            i++;
            g = gcd(a, b);
            l = (a*b)/g;
            a = l;
            if(i+1 < n)b = ara[i+1];
        }
        printf("%d\n", l);
    }
    return 0;
}

Compiler output:
main.c:1:9: fatal error: iostream: No such file or directory
    1 | #include<iostream>
      |         ^~~~~~~~~~
compilation terminated.
Language: C

#include<stdio.h>
int gcd(int a,int b){return a<b?gcd(b,a):b?gcd(b,a%b):a;}
int lcm(int a,int b){return a*(b/gcd(a,b));}
int main(){
  int a,b,c=1;
  scanf("%d",&a);
  while(a--){
    scanf("%d",&b);
    c=lcm(b,c);
  }
  printf("%d\n",c);
  return 0:
}

Compiler output:
main.c: In function 'main':
main.c:12:11: error: expected ';' before ':' token
   12 |   return 0:
      |           ^
      |           ;
Language: C

num=[]
num=input().split()
base=int(num[0])
index=int(num[1])
number=1
for i in range(index):
    number=number*base
print(number)

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | num=[]
      | ^~~
main.c:1:1: error: type defaults to 'int' in declaration of 'num' [-Wimplicit-int]
main.c:1:5: error: expected expression before '[' token
    1 | num=[]
      |     ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)
#define int long long
#define MOD 1000000007
int gcd(int a, int b) {
	if (a % b == 0)return b;
	return gcd(a, b % a);
}
int lcm(int a, int b) {
	return a / gcd(a, b) * b << endl;
}
signed main() {
	int n;
	int a[11];
	cin >> n;
	rep(i, n)cin >> a[i];
	int ans = a[0];
	rep(i, n)ans = lcm(ans, a[i]);
	cout << ans << endl;
	return 0;
}


Compiler output:
a.cc: In function 'long long int lcm(long long int, long long int)':
a.cc:11:34: error: invalid operands of types 'long long int' and '<unresolved overloaded function type>' to binary 'operator<<'
   11 |         return a / gcd(a, b) * b << endl;
      |                ~~~~~~~~~~~~~~~~~~^~~~~~~
Language: C++

#include <iostream>
#include <vector>

using namespace std;

int lcm(vector<int> ns) {
	int m = 1;
	for (int i = 2; ns.size() != 0; ++i) {
		int count_max = 0;
		for (vector<int>::iterator it = ns.begin(); it != ns.end();) {
			int count = 0;
			while (*it % i == 0) {
				++count;
				*it /= i;
			}
			if (count_max < count) count_max = count;

			if (*it == 1) ns.erase(it);
			else ++it;
		}
		m *= pow(i, count_max);
	}
	return m;
}

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

	vector<int> ns;
	while (n--) {
		int a;
		cin >> a;
		ns.push_back(a);
	}
	cout << lcm(ns) << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int lcm(std::vector<int>)':
a.cc:21:22: error: 'pow' was not declared in this scope
   21 |                 m *= pow(i, count_max);
      |                      ^~~
Language: C++

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

public class LCM {
	public static int numint[];
	public static int multiplied[];
	public static void main(String[] args) throws IOException{
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String str=br.readLine();
		String count=str;
		str=br.readLine();
		String numstr[]=str.split(" ",0);
		new numint[count-1];
		for (int i=1;i<=count;i++){
			numint[i-1]=Intager.parseInt(numstr[i-1]);
		}
		new multiplied[count-1];
		multiplied[0]=numint[0];
		for(int j=1;j<=count;j++){
			multiplied[j]=Euclid(j-1);
		}
		System.println(multiplied[count]);
		
	}
	public static int Euclid(int k){
		int x=multiplied[k];
		int y=numint[k+1];
		while (x!=y){
			if (x<y){
				y=y-x;
			}else{
				x=x-y;
			}
		}
		return x;
	}
}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.BufferedReader;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.io.IOException;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: 'import' does not name a type
    3 | import java.io.InputStreamReader;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:1: error: expected unqualified-id before 'public'
    5 | public class LCM {
      | ^~~~~~
Language: C++

#include<algorithm>
#include<iostream>
#include<cstring>
#include<Cstdio>
//by NeighThorn
using namespace std;
const int maxn=10+5;
int n,a[maxn],ans;
inline int gcd(int x,int y){
	return y==0?x:gcd(y,x%y);
}
signed main(void){
	scanf("%d",&n);
	for(int i=1;i<=n;i++)
		scanf("%d",&a[i]);
	ans=a[1];
	for(int i=2;i<=n;i++)	
		ans=ans*a[i]/gcd(a[i],ans);
	cout<<ans<<endl;
	return 0;
}

Compiler output:
a.cc:4:9: fatal error: Cstdio: No such file or directory
    4 | #include<Cstdio>
      |         ^~~~~~~~
compilation terminated.
Language: C++

#include <iostream>
using namespace std;

int gcd(int a, int b);
unsigned int lcm(int a, int b);

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

	for(int i=0; i<n; i++) cin >> num[i];
		
	int num[n];
	int a=num[0];
	for(int i=1; i<n; i++){
		a = lcm(a, num[i]);
	}
	cout << a << endl;
}

int gcd(int a, int b){
	int d, e, f;

	if(a>=b){ d=a; e=b; }
	else { d=b; e=a; }
	f=e;
	while(1){
		if(d%f==0) return f;
		f=d % e;
		d=e;
		e=f;
	}
}

unsigned int lcm(int a, int b){
	int c=gcd(a,b);
	unsigned int d;
	d=a;
	d /= c;
	d *= b;
	return d;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:39: error: 'num' was not declared in this scope; did you mean 'enum'?
   11 |         for(int i=0; i<n; i++) cin >> num[i];
      |                                       ^~~
      |                                       enum
Language: C++

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


public class Main {

	/**
	 * @param args
	 * @throws IOException 
	 */
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		
		String[] tmpArray = br.readLine().split(" ");
		int[] input = new int[n];
		
		for(int i = 0 ; i < n ; i++){
			input[i] = Integer.parseInt(tmpArray[i]);
		}
		
		int result = lcm(input);
		
		System.out.println(result);

	}

	static int gcd(int a, int b) {
	    if (b == 0){
	        return a;
	    }
	    return gcd(b, a % b);
	}

	static int lcm(int a, int b) {
	    return a * b / gcd(a, b);
	}
	
	static int lcm(int[] array){
		int result = array[array.length - 1];
		
		for(int i = array.length - 2 ; i >= 0 ; i--){
			result = lcm(result, array[i]);
		}
		
		return result;
	}

}

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.io.BufferedReader;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.io.IOException;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: 'import' does not name a type
    3 | import java.io.InputStreamReader;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:6:1: error: expected unqualified-id before 'public'
    6 | public class Main {
      | ^~~~~~
Language: C++

#include <bits/stdc++.h>


int main(){
    int n,a,g;
    
    scanf("%d",&n);
    for(int i = 0; i < n;i++){
        scanf("%d",&a);
        if(!i)g = n;
        else g = gcd(g,a);
    }
    printf("%d\n",g);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: 'gcd' was not declared in this scope; did you mean 'std::gcd'?
   11 |         else g = gcd(g,a);
      |                  ^~~
      |                  std::gcd
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:58,
                 from a.cc:1:
/usr/include/c++/14/numeric:173:5: note: 'std::gcd' declared here
  173 |     gcd(_Mn __m, _Nn __n) noexcept
      |     ^~~
Language: C++

#include<bits/stdc++.h> using namespace std; main(){ int a,n,x=1; cin>>n; while(n--){ cin>>a; x=x*a/__gcd(x,a); } cout<<x<<endl; } 


Compiler output:
a.cc:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std; main(){ int a,n,x=1; cin>>n; while(n--){ cin>>a; x=x*a/__gcd(x,a); } cout<<x<<endl; }
      |                         ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h> using namespace std; main(){ int a,n,x=1; cin>>n; while(n--){ cin>>a; x=x*a/__gcd(x,a); } cout<<x<<endl; }


Compiler output:
a.cc:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std; main(){ int a,n,x=1; cin>>n; while(n--){ cin>>a; x=x*a/__gcd(x,a); } cout<<x<<endl; }
      |                         ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h> using namespace std; int main(){ int n,a,now=1;cin>>n;while(n--)cin>>a,now=now/__gcd(now,a)*a;cout<<now<<endl;return 0; }


Compiler output:
a.cc:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std; int main(){ int n,a,now=1;cin>>n;while(n--)cin>>a,now=now/__gcd(now,a)*a;cout<<now<<endl;return 0; }
      |                         ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<bits/stdc++.h> using namespace std;main(){int a[10],n,i,sum;cin>>n;for(i=0;i<n;i++){cin>>a[i];if(i){sum=sum*a[i]/__gcd(sum,a[i]);}else{sum=a[i];}}cout<<sum<<endl;} 


Compiler output:
a.cc:1:25: warning: extra tokens at end of #include directive
    1 | #include<bits/stdc++.h> using namespace std;main(){int a[10],n,i,sum;cin>>n;for(i=0;i<n;i++){cin>>a[i];if(i){sum=sum*a[i]/__gcd(sum,a[i]);}else{sum=a[i];}}cout<<sum<<endl;}
      |                         ^~~~~
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include <iostream> #include <algorithm> using namespace std; #define gcd(a,b) __gcd(a,b) int main(){ int n,a,b = 1; cin >> n; for(int i = 0 ; i < n ; i++){ cin >> a; b = (a*b) / gcd(a,b); } cout << b << endl; return 0; }


Compiler output:
a.cc:1:21: warning: extra tokens at end of #include directive
    1 | #include <iostream> #include <algorithm> using namespace std; #define gcd(a,b) __gcd(a,b) int main(){ int n,a,b = 1; cin >> n; for(int i = 0 ; i < n ; i++){ cin >> a; b = (a*b) / gcd(a,b); } cout << b << endl; return 0; }
      |                     ^
/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/14/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x17): undefined reference to `main'
collect2: error: ld returned 1 exit status
Language: C++

#include<stdio.h>

void swap(unsigned long *a,unsigned long *b){
unsigned long temp;
temp=(*a);
(*a)=(*b);
(*b)=temp;

return;
}


unsigned long getGCM(unsigned long x,unsigned long y){
unsigned long a,b;

 if(x%y==0)return y;
 else{
  b=x%y;
  a=getGCM(y,b);
 }

}



unsigned long getLCM(unsigned long x,unsigned long y){
unsigned long gcm;
unsigned long lcm;
if(x<y)swap(&x,&y);
gcm=getGCM(x,y);

lcm=x*y/gcm;

return lcm;
}


unsigned long main(){
unsigned long n,i,j;
unsigned long A[10];


scanf("%d",&n);
for(i=0;i<n;i++)scanf("%ld",&A[i]);

for(i=n-1;i>0;i--){
 for(j=0;j<i;j++){
   A[j]=getLCM(A[j],A[j+1]);

 }

}
 
printf("%ld\n",A[0]);

return 0;
}


Compiler output:
cc1plus: error: '::main' must return 'int'
a.cc: In function 'long unsigned int getGCM(long unsigned int, long unsigned int)':
a.cc:19:11: warning: control reaches end of non-void function [-Wreturn-type]
   19 |   a=getGCM(y,b);
      |     ~~~~~~^~~~~
Language: C++

#include<bits/stdc++.h>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cctype>

#include<cmath>
#include<iostream>
#include<fstream>

#include<string>
#include<vector>
#include<queue>
#include<map>
#include<algorithm>
#include<set>
#include<sstream>
#include<stack>

using namespace std;

    int gcd(int a, int b)
{
    if (b == 0)
        return a;
    return gcd(b, a % b);
}

long long int findlcm(int arr[], int n)
{
    long long int  ans = arr[0];

    for (int i = 1; i < n; i++)
        ans = (((arr[i] * ans)) /
                (gcd(arr[i], ans)));

    return ans;
}

 int main()
{
    long long int n,i,j,ck=0;
    cin>>n;
    long long int arr[n];
    for(i=0; i<n; i++)
        cin>>arr[i];

     printf("%lld", findlcm(arr, n));
    return 0;
}





Compiler output:
a.cc: In function 'int main()':
a.cc:48:29: error: cannot convert 'long long int*' to 'int*'
   48 |      printf("%lld", findlcm(arr, n));
      |                             ^~~
      |                             |
      |                             long long int*
a.cc:29:27: note:   initializing argument 1 of 'long long int findlcm(int*, int)'
   29 | long long int findlcm(int arr[], int n)
      |                       ~~~~^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
    int n; cin >> n;
    ll x = 1;
    for (int i = 0; i < n; i++) {
        int t; cin >> t;
        x = x * t / __gcd(x, t);
    }
    cout << x << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:26: error: no matching function for call to '__gcd(ll&, int&)'
    9 |         x = x * t / __gcd(x, t);
      |                     ~~~~~^~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:1137:5: note: candidate: 'template<class _EuclideanRingElement> _EuclideanRingElement std::__gcd(_EuclideanRingElement, _EuclideanRingElement)'
 1137 |     __gcd(_EuclideanRingElement __m, _EuclideanRingElement __n)
      |     ^~~~~
/usr/include/c++/14/bits/stl_algo.h:1137:5: note:   template argument deduction/substitution failed:
a.cc:9:26: note:   deduced conflicting types for parameter '_EuclideanRingElement' ('long long int' and 'int')
    9 |         x = x * t / __gcd(x, t);
      |                     ~~~~~^~~~~~
Language: C++

#include<iostream>
int L(int a,int b){int i=2;int g=1;while(i<=a&&i<=b){if(a%i==0&&b%i==0){g*=i;a/=i;b/=i;}else i++;}return a*b*g;}int main(){int s;cin>>s;int a;int r=1;for(int i=0;i<s;i++){cin>>a;r=L(r,a);}std::cout<<r<<endl;return 0;}


Compiler output:
a.cc: In function 'int main()':
a.cc:2:130: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    2 | int L(int a,int b){int i=2;int g=1;while(i<=a&&i<=b){if(a%i==0&&b%i==0){g*=i;a/=i;b/=i;}else i++;}return a*b*g;}int main(){int s;cin>>s;int a;int r=1;for(int i=0;i<s;i++){cin>>a;r=L(r,a);}std::cout<<r<<endl;return 0;}
      |                                                                                                                                  ^~~
      |                                                                                                                                  std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:2:203: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    2 | int L(int a,int b){int i=2;int g=1;while(i<=a&&i<=b){if(a%i==0&&b%i==0){g*=i;a/=i;b/=i;}else i++;}return a*b*g;}int main(){int s;cin>>s;int a;int r=1;for(int i=0;i<s;i++){cin>>a;r=L(r,a);}std::cout<<r<<endl;return 0;}
      |                                                                                                                                                                                                           ^~~~
      |                                                                                                                                                                                                           std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
  int n;
  cin >> n;
  int a[n];
  for(int i=0; i<n; i++) cin >> a[i];
  for(int i=1; i<n; i++) {
    a[i] = a[i-1]*a[i]/__gcd(a[i-1], a[i]);
  }
  cout << a[n-1] << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:24: error: '__gcd' was not declared in this scope
   10 |     a[i] = a[i-1]*a[i]/__gcd(a[i-1], a[i]);
      |                        ^~~~~
Language: C

n,r;main() {
scanf("%d",&n);r=n;
for(int i = 2; i * i <= n; i++) {
if(n%i==0)r=1LL*r*(i-1)/i;
while(n%i==0)n/=i;}
if(--n)r=1LL*r*n/n++;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n,r;main() {
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: type defaults to 'int' in declaration of 'r' [-Wimplicit-int]
    1 | n,r;main() {
      |   ^
main.c:1:5: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n,r;main() {
      |     ^~~~
main.c: In function 'main':
main.c:2:1: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n,r;main() {
main.c:2:1: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:7:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    7 | n=!printf("%d\n",r);
      |    ^~~~~~
main.c:7:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:7:4: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

n;main(r,i) {
scanf("%d",&n);r=n;
for(i=2;i*i<=n;i++) {
if(n%i==0)for(;n%i==0;n/=i),r=1LL*r*(i-1)/i;
if(n!=1)r=1LL*r*(n-1)/n;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n;main(r,i) {
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n;main(r,i) {
      |   ^~~~
main.c: In function 'main':
main.c:1:3: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:3: error: type of 'i' defaults to 'int' [-Wimplicit-int]
main.c:2:1: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n;main(r,i) {
main.c:2:1: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:4:28: error: expected expression before ',' token
    4 | if(n%i==0)for(;n%i==0;n/=i),r=1LL*r*(i-1)/i;
      |                            ^
main.c:6:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 | n=!printf("%d\n",r);
      |    ^~~~~~
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:1: error: expected declaration or statement at end of input
    7 | }
      | ^
Language: C

n;main(r,i) {
scanf("%d",&n);r=n;
for(i=2;i*i<=n;i++) {
if(n%i==0)for(;n%i==0;n/=i);,r=1LL*r*(i-1)/i;
if(n!=1)r=1LL*r*(n-1)/n;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n;main(r,i) {
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n;main(r,i) {
      |   ^~~~
main.c: In function 'main':
main.c:1:3: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:3: error: type of 'i' defaults to 'int' [-Wimplicit-int]
main.c:2:1: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n;main(r,i) {
main.c:2:1: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:4:29: error: expected expression before ',' token
    4 | if(n%i==0)for(;n%i==0;n/=i);,r=1LL*r*(i-1)/i;
      |                             ^
main.c:6:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 | n=!printf("%d\n",r);
      |    ^~~~~~
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:1: error: expected declaration or statement at end of input
    7 | }
      | ^
Language: C

n;main(r,i) {
scanf("%d",&n);r=n;
for(i=2;i*i<=n;i++) {
if(n%i==0)r=1LL*r*(i-1)/i,for(;n%i==0;n/=i);
if(n!=1)r=1LL*r*(n-1)/n;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n;main(r,i) {
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n;main(r,i) {
      |   ^~~~
main.c: In function 'main':
main.c:1:3: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:3: error: type of 'i' defaults to 'int' [-Wimplicit-int]
main.c:2:1: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n;main(r,i) {
main.c:2:1: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    2 | scanf("%d",&n);r=n;
      | ^~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:4:27: error: expected expression before 'for'
    4 | if(n%i==0)r=1LL*r*(i-1)/i,for(;n%i==0;n/=i);
      |                           ^~~
main.c:6:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    6 | n=!printf("%d\n",r);
      |    ^~~~~~
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:6:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:6:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:7:1: error: expected declaration or statement at end of input
    7 | }
      | ^
Language: C

n;main(r,i){
scanf("%d",&r=&n);
for(i=2;i*i<=n;i++)if(n%i==0)for(r=1LL*r*(i-1)/i;n%i==0;n/=i);
if(--n)r=1LL*r*n/++n;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n;main(r,i){
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n;main(r,i){
      |   ^~~~
main.c: In function 'main':
main.c:1:3: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:3: error: type of 'i' defaults to 'int' [-Wimplicit-int]
main.c:2:1: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    2 | scanf("%d",&r=&n);
      | ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n;main(r,i){
main.c:2:1: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    2 | scanf("%d",&r=&n);
      | ^~~~~
main.c:2:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:2:14: error: lvalue required as left operand of assignment
    2 | scanf("%d",&r=&n);
      |              ^
main.c:5:4: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    5 | n=!printf("%d\n",r);
      |    ^~~~~~
main.c:5:4: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:5:4: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:5:4: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

n;main(r,i=2){
for(scanf("%d",&n),r=n;i*i<=n;i++)if(n%i==0)for(r=1LL*r*(i-1)/i;n%i==0;n/=i);
if(--n)r=1LL*r*n/++n;
n=!printf("%d\n",r);
}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n;main(r,i=2){
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:11: error: expected ')' before '=' token
    1 | n;main(r,i=2){
      |           ^
      |           )
Language: C

n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |   ^
main.c:1:7: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |       ^~~~
main.c: In function 'main':
main.c:1:7: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:19: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
main.c:1:19: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:19: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:56: error: expected expression before 'for'
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                                                        ^~~
main.c:1:111: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i==0&&for(r=1.*r*(i-1)/i;n%i==0;n/=i);if(--n)r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                                                                                                               ^~~~~~
main.c:1:111: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:111: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:111: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |   ^
main.c:1:7: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |       ^~~~
main.c: In function 'main':
main.c:1:7: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:19: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
main.c:1:19: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:19: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:96: error: lvalue required as left operand of assignment
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                                                                                                ^
main.c:1:111: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)if(n%++i==0)for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n&&r=1.*r*n/++n;n=!printf("%d\n",r);}
      |                                                                                                               ^~~~~~
main.c:1:111: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:111: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:111: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}

Compiler output:
main.c:1:1: warning: data definition has no type or storage class
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      | ^
main.c:1:1: error: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
main.c:1:3: error: type defaults to 'int' in declaration of 'i' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |   ^
main.c:1:7: error: return type defaults to 'int' [-Wimplicit-int]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |       ^~~~
main.c: In function 'main':
main.c:1:7: error: type of 'r' defaults to 'int' [-Wimplicit-int]
main.c:1:19: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
main.c:1:19: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |                   ^~~~~
main.c:1:19: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:54: error: expected expression before 'for'
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |                                                      ^~~
main.c:1:108: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | n,i=1;main(r){for(scanf("%d",&n),r=n;i*i<=n;)n%++i?0:for(r=1.*r*(i-1)/i;n%i==0;n/=i);--n?r=1.*r*n/++n:0;n=!printf("%d\n",r);}
      |                                                                                                            ^~~~~~
main.c:1:108: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:108: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:108: note: include '<stdio.h>' or provide a declaration of 'printf'
Language: C

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

int euler_phi(int n) {
  int ret = n;

  for(int i=2; i*i<=n; i++) {
    if(n % i == 0) {
      ret -= ret/i;
      while(n % i == 0)	n /= i;
    }
  }
  if(n > 1) ret -= ret/n;
  
  return ret;
}

int main() {
  int n;
  cin >> n;
  
  cout << euler_phi(n) << endl;
  
  return 0;
}

Compiler output:
main.c:1:10: fatal error: iostream: No such file or directory
    1 | #include <iostream>
      |          ^~~~~~~~~~
compilation terminated.
Language: C++

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

//素数判定(素数ならtrue)
bool Prime(int prime)
{
	//偶数除く
	if (prime == 2) {
		return true;
	}
	else if (prime % 2 == 0 || prime < 2) {
		return false;
	}

	float Asqrt = sqrtf(prime);

	for (int i = 3; i <= Asqrt; i += 2) {
		if (prime%i == 0) {
			return false;
		}
	}

	return true;
}

//1からnまでのnと互いに素の個数
int Euler(int n)
{
	//最初のnを記録
	int n1 = n;
	//素因数の種類を記録
	vector<int> vec;

	for (int prime = 2;; prime++) {

		if (Prime(n)) {
			vec.push_back(n);
			break;
		}

		while (true)
		{
			//素数 かつ 素因数の場合
			if (Prime(prime) && n%prime == 0) {
				n /= prime;

				if (n == 1) {
					vec.push_back(prime);
					goto MATH;
				}

				//分解可能なら続ける
				continue;
			}

			vec.push_back(prime);
			//分解不可でbreak;
			break;
		}

	}

MATH:
	// 1/素因数
	double a, ans = 1.0;

	for (int i = 0; i < vec.size(); i++) {
		a =(double) 1 / vec.at(i);
		ans = ans * (1.0 - a);
	}

	return n1 * ans;
}

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

	cout << Euler(n) << endl;

	return 0;
}


Compiler output:
a.cc: In function 'bool Prime(int)':
a.cc:16:23: error: 'sqrtf' was not declared in this scope
   16 |         float Asqrt = sqrtf(prime);
      |                       ^~~~~
Language: C++

require 'prime'
def phi_func(n)
    factors=n.prime_division
    fct=factors.pop
    phi=(fct[0]-1)*fct[0]**(fct[1]-1)
    if factors.size.zero?
        return phi
    else
        m=Prime.int_from_prime_division(factors)
        return phi*phi_func(m)
    end
end

n=gets.to_i
p phi_func(n)


Compiler output:
a.cc:1:9: warning: multi-character literal with 5 characters exceeds 'int' size of 4 bytes
    1 | require 'prime'
      |         ^~~~~~~
a.cc:1:1: error: 'require' does not name a type
    1 | require 'prime'
      | ^~~~~~~