criyle/codenet-compile-errors huggingface dataset:
Language: Java

import java.util.Scanner;
    public class ABC172D{
    	 public static void main(String args[]){
    	Scanner scanner = new Scanner(System.in);

    	int n=scanner.nextInt();
           int k=1;
           int t=0;
 
           	for(int i=1;i<=n;i++){
            for(int j=1;j<=n/2;j++)
              if(n%j==0){
              k=k+1;
              }
              t=t+i*k;
            }
           System.out.println(t);
    }}

Compiler output:
Main.java:2: error: class ABC172D is public, should be declared in a file named ABC172D.java
    public class ABC172D{
           ^
1 error
Language: Java

  import java.util.Arrays;
import java.util.Scanner;
    public class ABC172C {
    	 public static void main(String args[]){
    	Scanner scanner = new Scanner(System.in);

    	int n=scanner.nextInt();
           int k=1;
           int t=0;
 
           	for(int i=1;i<=n;i++){
            for(int j=1;j<=n/2;j++)
              if(n%j==0){
              k=k+1;
              }
              t=t+i*k;
            }
           System.out.println(t);
    }

Compiler output:
Main.java:19: error: reached end of file while parsing
    }
     ^
1 error
Language: C++

import sys
import math
from collections import deque
input = sys.stdin.readline
#S,L,R = map(int, input().split())

N = int(input())

Answer = 0

for i in range(1,N+1):
    cnt = N // i
    num = cnt * (cnt + 1) >> 1
    num *= i
    Answer += num

print(Answer)

Compiler output:
a.cc:5:2: error: invalid preprocessing directive #S
    5 | #S,L,R = map(int, input().split())
      |  ^
a.cc:1:1: error: 'import' does not name a type
    1 | import sys
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: Java

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
  	Scanner s = new Scanner(System.in);
   	int n = s.nextInt();
   	int result[];
   	int count = 0;
   	for(int i=1;i<=n;i++){
      int j = i;
      while(j-- > 0){
       	if((j/j)==0) 
    		count++;
      }
      int k  = 0;
      result[k++] = i * count; 
   }
   int save = 0;
   for(int i=0;i<result.length;i++){
   	save = save + result[i];
   }
   System.out.println(save);
 }
}


Compiler output:
Main.java:15: error: variable result might not have been initialized
      result[k++] = i * count; 
      ^
Main.java:18: error: variable result might not have been initialized
   for(int i=0;i<result.length;i++){
                 ^
2 errors
Language: Java

import java.util.Scanner;
public class Main{
 public static void main(String[] args){
  	Scanner s = new Scanner(System.in);
   	int n = s.nextInt();
   	int result[];
   	int count = 0;
   	for(int i=1;i<=n;i++){
      int j = i;
      while(j-- > 0){
       	if((j/j)==0) 
    		count++;
      }
      int k  = 0;
      result[k++] = i * count; 
   }
   int save;
   for(int i=0;i<result.length;i++){
   	save = save + result[i];
   }
   System.out.println(save);
 }
}


Compiler output:
Main.java:15: error: variable result might not have been initialized
      result[k++] = i * count; 
      ^
Main.java:18: error: variable result might not have been initialized
   for(int i=0;i<result.length;i++){
                 ^
Main.java:19: error: variable save might not have been initialized
   	save = save + result[i];
   	       ^
Main.java:21: error: variable save might not have been initialized
   System.out.println(save);
                      ^
4 errors
Language: Java

import java.util.Scanner;
public class Main{
 public static void main(Strign[] args){
  	Scanner s = new Scanner(System.in);
   	int n = s.nextInt();
   	int result[];
   	int count = 0;
   	for(int i=1;i<=n;i++){
      int j = i;
      while(j-- > 0){
       	if((j/j)==0) 
    		count++;
      }
      int k  =0;
      result[k++] = i * count; 
   }
   int save;
   for(int i=0;i<result.length;i++){
   	save = save + result[i];
   }
   System.out.println(save);
 }
}

Compiler output:
Main.java:3: error: cannot find symbol
 public static void main(Strign[] args){
                         ^
  symbol:   class Strign
  location: class Main
1 error
Language: C++

#define ll long long
#include<iostream>
using namespace std;
int main()
{
	ll n;
	int add=0;
	cin>>n;
	if(int i=1;i<=n;i++)
	{
		if(int j=1;j<=n;j++)
		{
			if(i%j==0)
			{
			  add+=i;	
			}
		}
	}
	cout<<add<<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:24: error: expected ')' before ';' token
    9 |         if(int i=1;i<=n;i++)
      |           ~            ^
      |                        )
a.cc:9:25: error: 'i' was not declared in this scope
    9 |         if(int i=1;i<=n;i++)
      |                         ^
Language: C++

#define ll long long
#include<iostream>
using namespace std;
int main()
{
	ll n;
	int add=0;
	cin>>n;
	if(ll i=1 ; i<=n ; i++)
	{
		if(ll j=1 ; j<=n ; j++)
		{
			if(i%j==0)
			{
			  add+=i;	
			}
		}
	}
	cout<<add<<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:25: error: expected ')' before ';' token
    9 |         if(ll i=1 ; i<=n ; i++)
      |           ~             ^~
      |                         )
a.cc:9:28: error: 'i' was not declared in this scope
    9 |         if(ll i=1 ; i<=n ; i++)
      |                            ^
Language: C++

#define ll long long
#include<iostream>
using namespace std;
int main()
{
	ll n;
	int add=0;
	cin>>n;
	if(ll i=1;i<=n;i++)
	{
		if(ll j=1;j<=n;j++)
		{
			if(i%j==0)
			{
			  add+=i;	
			}
		}
	}
	cout<<add<<"\n";
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:23: error: expected ')' before ';' token
    9 |         if(ll i=1;i<=n;i++)
      |           ~           ^
      |                       )
a.cc:9:24: error: 'i' was not declared in this scope
    9 |         if(ll i=1;i<=n;i++)
      |                        ^
Language: C++

#define ll long long
#include<iostream>
using namespace std;
int main()
{
  ll n;
  int add=0;
  cin>>n;
  if(ll i=1;i<=n;i++)
  {
    if(ll j=1;j<=n;j++
       {
         if(i%j==0)
         {
           add+=i;
         }
       }
  }
    cout<<add<<"\n";
       return 0;
 }
           

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: expected ')' before ';' token
    9 |   if(ll i=1;i<=n;i++)
      |     ~           ^
      |                 )
a.cc:9:18: error: 'i' was not declared in this scope
    9 |   if(ll i=1;i<=n;i++)
      |                  ^
Language: Java

import java.io.*;
import java.util.*;
public class gym{
	static void main() throws Exception{
		int n=sc.nextInt();
		int[]f=new int[n+1];
		for(int i=1;i<=n;i++) {
			for(int j=i;j<=n;j+=i) {
				f[j]++;
			}
		}
		long ans=0;
		for(int i=1;i<=n;i++) {
			ans+=(i*1l*f[i]);
		}
		pw.println(ans);
	}
	public static void main(String[] args) throws Exception{
		sc=new MScanner(System.in);
		pw = new PrintWriter(System.out);
		int tc=1;
//		tc=sc.nextInt();
		while(tc-->0)
			main();
		pw.flush();
	}
	static PrintWriter pw;
	static MScanner  sc;
	static class MScanner {
		StringTokenizer st;
		BufferedReader br;
		public MScanner(InputStream system) {
			br = new BufferedReader(new InputStreamReader(system));
		}
 
		public MScanner(String file) throws Exception {
			br = new BufferedReader(new FileReader(file));
		}
 
		public String next() throws IOException {
			while (st == null || !st.hasMoreTokens())
				st = new StringTokenizer(br.readLine());
			return st.nextToken();
		}
		public int[] intArr(int n) throws IOException {
	        int[]in=new int[n];for(int i=0;i<n;i++)in[i]=nextInt();
	        return in;
		}
		public long[] longArr(int n) throws IOException {
	        long[]in=new long[n];for(int i=0;i<n;i++)in[i]=nextLong();
	        return in;
		}
		public int[] intSortedArr(int n) throws IOException {
	        int[]in=new int[n];for(int i=0;i<n;i++)in[i]=nextInt();
	        shuffle(in);
	        Arrays.sort(in);
	        return in;
		}
		public long[] longSortedArr(int n) throws IOException {
	        long[]in=new long[n];for(int i=0;i<n;i++)in[i]=nextLong();
	        shuffle(in);
	        Arrays.sort(in);
	        return in;
		}
		public Integer[] IntegerArr(int n) throws IOException {
	        Integer[]in=new Integer[n];for(int i=0;i<n;i++)in[i]=nextInt();
	        return in;
		}
		public Long[] LongArr(int n) throws IOException {
	        Long[]in=new Long[n];for(int i=0;i<n;i++)in[i]=nextLong();
	        return in;
		}
		public String nextLine() throws IOException {
			return br.readLine();
		}
 
		public int nextInt() throws IOException {
			return Integer.parseInt(next());
		}
 
		public double nextDouble() throws IOException {
			return Double.parseDouble(next());
		}
 
		public char nextChar() throws IOException {
			return next().charAt(0);
		}
 
		public long nextLong() throws IOException {
			return Long.parseLong(next());
		}
 
		public boolean ready() throws IOException {
			return br.ready();
		}
 
		public void waitForInput() throws InterruptedException {
			Thread.sleep(3000);
		}
	}
	static void shuffle(int[]in) {
		for(int i=0;i<in.length;i++) {
			int idx=(int)(Math.random()*in.length);
			int tmp=in[i];
			in[i]=in[idx];
			in[idx]=tmp;
		}
	}
	static void shuffle(long[]in) {
		for(int i=0;i<in.length;i++) {
			int idx=(int)(Math.random()*in.length);
			long tmp=in[i];
			in[i]=in[idx];
			in[idx]=tmp;
		}
	}
}

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

#include<bits/stdc++.h>
using namespace std;
int main()
{
  long int a;
  cin>>a;
  long int ans=0;
  for(int j=1; j<=a; j++){
  	for(int i=1; i<=a; i++){
    if(i%j==0){
    ams+=i;
    }
    }
  }
  cout<<ans<<"\n";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:5: error: 'ams' was not declared in this scope; did you mean 'ans'?
   11 |     ams+=i;
      |     ^~~
      |     ans
Language: Java

import java.util.*;
import java.io.*;
public class Main{
  static ArrayList<Integer> primes = new ArrayList<Integer>();
   public static void main(String[] main) throws Exception{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      StringTokenizer st = new StringTokenizer(br.readLine());
     sieve(3161);
      PrintWriter out = new PrintWriter(System.out);
      int n = Integer.parseInt(st.nextToken());
      long ans = 1;
     div = new int[n+1];
     div[1] = 1;
     for(int i = 2; i <= n; i++)
       ans += solve(i);
     out.println(ans);
      out.close();
   }
  static void sieve(int n){
    boolean prime[] = new boolean[n+1];
    for(int i = 0; i < n; i++)
      prime[i] = true;
    for(int p = 2; p*p <= n; p++){
      if(prime[p]){
        for(int i = p*p; i <= n; i+= p)
          prime[i] = false;
      }
    }
    for(int i = 2; i <= n; i++){
      if(prime[i])
        primes.add(i);
    }
  }
  static int[] div;
  static long solve(int n){
    int p = 0;
    for(int prime:primes){
      if(n%prime == 0){
        p = prime;
      	break;
      }
    }
    if(work == 0){
      div[n] = 2;
      return (long)2*n;
    }
    else{
      int help = n/p;
      if(help%p == 0)
        div[n] = 2*div[help] - div[help/p];
      else
        div[n] = 2*div[help];
      return (long)div[n]*n;
    }
  }
}

Compiler output:
Main.java:43: error: cannot find symbol
    if(work == 0){
       ^
  symbol:   variable work
  location: class Main
1 error
Language: Java

import java.util.*;
import java.io.*;
public class Main{
  static ArrayList<Integer> primes = new ArrayList<Integer>();
   public static void main(String[] main) throws Exception{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      StringTokenizer st = new StringTokenizer(br.readLine());
     sieve(3161);
      PrintWriter out = new PrintWriter(System.out);
      int n = Integer.parseInt(st.nextToken());
      long ans = 1;
     div = new int[n+1];
     div[1] = 1;
     for(int i = 2; i <= n; i++)
       ans += solve(i);
     out.println(ans);
      out.close();
   }
  static void sieve(int n){
    boolean prime[] = new boolean[n+1];
    for(int i = 0; i < n; i++)
      prime[i] = true;
    for(int p = 2; p*p <= n; p++){
      if(prime[p]){
        for(int i = p*p; i <= n; i+= p)
          prime[i] = false;
      }
    }
    for(int i = 2; i <= n; i++){
      if(prime[i])
        primes.add(i);
    }
  }
  static int[] div;
  static long solve(int n){
    int work = 0;
    for(int p:primes){
      if(n%p == 0){
        work = p;
      	break;
      }
    }
    if(work == 0){
      div[n] = 2;
      return (long)2*n;
    }
    else{
      int help = n/p;
      if(help%p == 0)
        div[n] = 2*div[help] - div[help/p];
      else
        div[n] = 2*div[help];
      return (long)div[n]*n;
    }
  }
}

Compiler output:
Main.java:48: error: cannot find symbol
      int help = n/p;
                   ^
  symbol:   variable p
  location: class Main
Main.java:49: error: cannot find symbol
      if(help%p == 0)
              ^
  symbol:   variable p
  location: class Main
Main.java:50: error: cannot find symbol
        div[n] = 2*div[help] - div[help/p];
                                        ^
  symbol:   variable p
  location: class Main
3 errors
Language: Java

import java.util.*;
import java.io.*;
public class template1{
  static ArrayList<Integer> primes = new ArrayList<Integer>();
   public static void main(String[] main) throws Exception{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      StringTokenizer st = new StringTokenizer(br.readLine());
     sieve(3161);
      PrintWriter out = new PrintWriter(System.out);
      int n = Integer.parseInt(st.nextToken());
      long ans = 0;
     int[] div = new int[n+1];
     for(int i = 1; i <= n; i++)
       ans += solve(i);
     out.println(ans);
      out.close();
   }
  static void sieve(n){
    boolean prime[] = new boolean[n+1];
    for(int i = 0; i < n; i++)
      prime[i] = true;
    for(int p = 2; p*p <= n; p++){
      if(prime[p]){
        for(int i = p*p; i <= n; i+= p)
          prime[i] = false;
      }
    }
    for(int i = 2; i <= n; i++){
      if(prime[i])
        primes.add(i);
    }
  }
  static int[] div;
  static long solve(int n){
    int work = 0;
    for(int p:primes){
      if(n%p == 0){
        work = p;
      	break;
      }
    }
    if(work == 0){
      div[n] = 2;
      return (long)2*n;
    }
    else{
      int help = n/p;
      if(help%p == 0)
        div[n] = 2*div[help] - div[help/p];
      else
        div[n] = 2*div[help];
      return (long)div[n]*n;
    }
  }
}

Compiler output:
Main.java:18: error: <identifier> expected
  static void sieve(n){
                     ^
1 error
Language: C++

#include <iostream>
#include<vector>


//setbase - cout << setbase (16)a; cout << 100 << endl; Prints 64
//setfill -   cout << setfill ('x') << setw (5); cout << 77 <<endl;prints xxx77
//setprecision - cout << setprecision (14) << f << endl; Prints x.xxxx
//cout.precision(x)  cout<<fixed<<val;  // prints x digits after decimal in val

using namespace std;


//std::ios::sync_with_stdio(false); cin.tie(NULL);

int main()
{
     long long int  n,sum=0;
    std::ios::sync_with_stdio(false); cin.tie(NULL);
    cin>>n;
  vector<long long int> v(n+1);
    for(long long int i=1; i<=n; i++){
        for(long long int j=i; j<=n; j+=i){
            v[j]++;
        }
    for( long long int i=1;i<=n;++i)
    {
        sum+=i*v[i];
    }
    cout<<sum<<endl;
  return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:31:2: error: expected '}' at end of input
   31 | }
      |  ^
a.cc:16:1: note: to match this '{'
   16 | {
      | ^
Language: C++

#include <iostream>


//setbase - cout << setbase (16)a; cout << 100 << endl; Prints 64
//setfill -   cout << setfill ('x') << setw (5); cout << 77 <<endl;prints xxx77
//setprecision - cout << setprecision (14) << f << endl; Prints x.xxxx
//cout.precision(x)  cout<<fixed<<val;  // prints x digits after decimal in val

using namespace std;


//std::ios::sync_with_stdio(false); cin.tie(NULL);

int main()
{
     long long int  n,sum=0;
    std::ios::sync_with_stdio(false); cin.tie(NULL);
    cin>>n;
  vector<long long int> v(n+1);
    for(long long int i=1; i<=n; i++){
        for(long long int j=i; j<=n; j+=i){
            v[j]++;
        }
    for( long long int i=1;i<=n;++i)
    {
        sum+=i*v[i];
    }
    cout<<sum<<endl;
  return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:19:3: error: 'vector' was not declared in this scope
   19 |   vector<long long int> v(n+1);
      |   ^~~~~~
a.cc:2:1: note: 'std::vector' is defined in header '<vector>'; this is probably fixable by adding '#include <vector>'
    1 | #include <iostream>
  +++ |+#include <vector>
    2 | 
a.cc:19:10: error: expected primary-expression before 'long'
   19 |   vector<long long int> v(n+1);
      |          ^~~~
a.cc:22:13: error: 'v' was not declared in this scope
   22 |             v[j]++;
      |             ^
a.cc:26:16: error: 'v' was not declared in this scope
   26 |         sum+=i*v[i];
      |                ^
a.cc:30:2: error: expected '}' at end of input
   30 | }
      |  ^
a.cc:15:1: note: to match this '{'
   15 | {
      | ^
Language: C++

#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int main()
{
  ll x=1e7+1;
  ll prime[x]={1};
  for(ll i=2;i<=n;i++)
  {
    for(ll j=i;j<=n;j=j+i)
      prime[j]++;
  }
  ll n;
  cin>>n;
  ll tot=0;
  for(ll i=1;i<=n;i++)
  {
    tot+=i*prime[i];
    
    
    
  }
  cout<<tot<<endl;
  
  
  
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:17: error: 'n' was not declared in this scope
    8 |   for(ll i=2;i<=n;i++)
      |                 ^
Language: Java

public class Main {
    public static void main(String[] args) {
        var scanner = new Scanner(System.in);
        var n = scanner.nextInt();
        int count = 0;
        for(int i = 1; i <= n; i++){
            for (int j = 1; i * j <= n; j++) {
                count += i * j;
            }
        }
        System.out.println(count);
    }
}


Compiler output:
Main.java:3: error: cannot find symbol
        var scanner = new Scanner(System.in);
                          ^
  symbol:   class Scanner
  location: class Main
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
#define lli unsigned long long int

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(false);
	cout.tie(false);
	
	lli n;
	cin >> n;
	
	if(n==1) {
		cout << 1 ;
		return 0;
	}
	lli sum = 0;
	for(lli x=1; x<=n; x++)
	{
		lli y = (n/x);
		lli tmp = (y*(y+1)*x)/2;
		sum += tmp;
	}
	cout << sum ;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: no matching function for call to 'std::basic_istream<char>::tie(bool)'
    8 |         cin.tie(false);
      |         ~~~~~~~^~~~~~~
In file included from /usr/include/c++/14/ios:46,
                 from /usr/include/c++/14/istream:40,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_ios.h:299:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie() const [with _CharT = char; _Traits = std::char_traits<char>]'
  299 |       tie() const
      |       ^~~
/usr/include/c++/14/bits/basic_ios.h:299:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/14/bits/basic_ios.h:311:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie(std::basic_ostream<_CharT, _Traits>*) [with _CharT = char; _Traits = std::char_traits<char>]'
  311 |       tie(basic_ostream<_CharT, _Traits>* __tiestr)
      |       ^~~
/usr/include/c++/14/bits/basic_ios.h:311:43: note:   no known conversion for argument 1 from 'bool' to 'std::basic_ostream<char>*'
  311 |       tie(basic_ostream<_CharT, _Traits>* __tiestr)
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
a.cc:9:17: error: no matching function for call to 'std::basic_ostream<char>::tie(bool)'
    9 |         cout.tie(false);
      |         ~~~~~~~~^~~~~~~
/usr/include/c++/14/bits/basic_ios.h:299:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie() const [with _CharT = char; _Traits = std::char_traits<char>]'
  299 |       tie() const
      |       ^~~
/usr/include/c++/14/bits/basic_ios.h:299:7: note:   candidate expects 0 arguments, 1 provided
/usr/include/c++/14/bits/basic_ios.h:311:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>* std::basic_ios<_CharT, _Traits>::tie(std::basic_ostream<_CharT, _Traits>*) [with _CharT = char; _Traits = std::char_traits<char>]'
  311 |       tie(basic_ostream<_CharT, _Traits>* __tiestr)
      |       ^~~
/usr/include/c++/14/bits/basic_ios.h:311:43: note:   no known conversion for argument 1 from 'bool' to 'std::basic_ostream<char>*'
  311 |       tie(basic_ostream<_CharT, _Traits>* __tiestr)
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
Language: Java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();   
      	long ans = 0;
      	for(int i=0;i<=n;i++){
          int t = n / i;
          long l = i * t * ( t+1 ) / 2;
          ans += l;
        }
      	System.out.println(count);
	}
}

Compiler output:
Main.java:12: error: cannot find symbol
      	System.out.println(count);
      	                   ^
  symbol:   variable count
  location: class Main
1 error
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int ans=0;
    for(int j=1;j<=n;j++) 
    {
        for(int i=1;i<=n;i++)
        {
            if(i % j == 0) 
                ans += i
        }
    }
    cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:25: error: expected ';' before '}' token
   13 |                 ans += i
      |                         ^
      |                         ;
   14 |         }
      |         ~
Language: C++

#include<iostream>
#include<algorithm>
#include<cstdio>
using namespace std;
typedef long long ll;
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    cin>>n;
    ll res=0;
    for(int i=1;i<=n;i++)
        for(int j=i;j<=n;j+=i) res+=j;//相当于乘k
    cout<<res<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:10: error: 'n' was not declared in this scope
   10 |     cin>>n;
      |          ^
Language: C

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

typedef long long ll;

int max(int a, int b){
  if(a > b) return a;
  else return b;
}
int min(int a, int b){
  if(a < b) return a;
  else return b;
}

int sort(const void *a ,const void *b){
  return *(int*)a - *(int*)b;
}

int f(int a){
  int count = 0;
  int flag = 0;
  for(int i = 1; i <= pow(a,0.5); ++i){
    if(a % i == 0) count ++;
    if(i*i == a)flag = 1;
  }
  count *= 2;
  if(flag == 1) --count;
  return count;
}


int main(){

  int n;
  scanf("%d",&n);

  ll ans = 0;
  int y;
  for(int j = 1; j <= n; ++j){
    y = n/j;
    ans += j*(y*(y+1)/2);
  }

  printf("%lld",ans);

1100  return 0;
}


Compiler output:
main.c: In function 'main':
main.c:48:5: error: expected ';' before 'return'
   48 | 1100  return 0;
      |     ^ ~~~~~~
      |     ;
Language: C++

#include<iostream>
using namespace std;
#define ll long long int
ll hash[10000005]={};
int main(){
	ll i;
	for(i=2;i<=10000001;i++){
		ll j=i;
		while(j<10000005){
			hash[j]++;
			j=j+i;
		}
	}
	ll n;
	cin>>n;
	ll ans = 0;
	for(i=1;i<=n;i++){
		ans =ans+i*(hash[i]+1);
	}
	cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:25: error: reference to 'hash' is ambiguous
   10 |                         hash[j]++;
      |                         ^~~~
In file included from /usr/include/c++/14/string_view:50,
                 from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/functional_hash.h:59:12: note: candidates are: 'template<class _Tp> struct std::hash'
   59 |     struct hash;
      |            ^~~~
a.cc:4:4: note:                 'long long int hash [10000005]'
    4 | ll hash[10000005]={};
      |    ^~~~
a.cc:18:29: error: reference to 'hash' is ambiguous
   18 |                 ans =ans+i*(hash[i]+1);
      |                             ^~~~
/usr/include/c++/14/bits/functional_hash.h:59:12: note: candidates are: 'template<class _Tp> struct std::hash'
   59 |     struct hash;
      |            ^~~~
a.cc:4:4: note:                 'long long int hash [10000005]'
    4 | ll hash[10000005]={};
      |    ^~~~
Language: C++

#include<iostream>
using namespace std;
#define ll long long int
ll hash[10000005]={};
int main(){
	ll i;
	for(i=1;i<=10000001;i++){
		ll j=i;
		while(j<10000005){
			hash[j]++;
			j=j+i;
		}
	}
	ll n;
	cin>>n;
	ll ans = 0;
	for(i=1;i<=n;i++){
		ans =ans+i*hash[i];
	}
	cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:25: error: reference to 'hash' is ambiguous
   10 |                         hash[j]++;
      |                         ^~~~
In file included from /usr/include/c++/14/string_view:50,
                 from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/functional_hash.h:59:12: note: candidates are: 'template<class _Tp> struct std::hash'
   59 |     struct hash;
      |            ^~~~
a.cc:4:4: note:                 'long long int hash [10000005]'
    4 | ll hash[10000005]={};
      |    ^~~~
a.cc:18:28: error: reference to 'hash' is ambiguous
   18 |                 ans =ans+i*hash[i];
      |                            ^~~~
/usr/include/c++/14/bits/functional_hash.h:59:12: note: candidates are: 'template<class _Tp> struct std::hash'
   59 |     struct hash;
      |            ^~~~
a.cc:4:4: note:                 'long long int hash [10000005]'
    4 | ll hash[10000005]={};
      |    ^~~~
Language: C++

#include <iostream>
using namespace std;
 
int main(){
  int n, num;
  cin >> n;
  int sum = 0;
  int c = 1;
  num = n/2;
  
  if (n>=2){
    for(int i=1; i<=num; i++){
      c = 1;
      for(int j=1; j<=i; j++){
        if(i%j==0){
          c++;
        }
        sum += i*c;
      }
    }
  }
  else if (n==1){
    sum = 1
  }
  cout << sum << endl;
 }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:12: error: expected ';' before '}' token
   23 |     sum = 1
      |            ^
      |            ;
   24 |   }
      |   ~         
a.cc: At global scope:
a.cc:27:1: error: expected declaration before '}' token
   27 | }
      | ^
Language: C++

#include <iostream>
using namespace std;
 
int main(){
  int n;
  cin >> n;
  int sum,c  = 0, 0;
  
  for(int i=1; i<=n; i++){
    c = 0;
    for(int j=1; j<=i; j++){
      if(i%j==0){
        c++;
      }
      sum += i*c;
    }
  cout << sum << endl;
  }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:19: error: expected unqualified-id before numeric constant
    7 |   int sum,c  = 0, 0;
      |                   ^
Language: C++

#include <iostream>
using namespace std;
 
int main(){
  int n;
  cin >> n;
  int sum = 0;
  int c = 0;
  
  for(int i=1; i<=n; i++){
    c = 0;
    for(int j=1; j<=i; j++){
      if(i%j==0){
        c++;
      }
      sum += i*c;
    }
  cout << sum << endl;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:19:4: error: expected '}' at end of input
   19 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

#include <iostream>
using namespace std;

int main(){
  int n;
  cin >> n;
  int sum,c  = 0, 0;
  
  for(int i=1; i<=n; i++){
    c = 0;
    for(int j=1; j<=i; j++){
      if(i%j==0){
        c++;
      }
      sum += i*c;
    }
  cout << sum << endl;
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:7:19: error: expected unqualified-id before numeric constant
    7 |   int sum,c  = 0, 0;
      |                   ^
a.cc:18:4: error: expected '}' at end of input
   18 |   }
      |    ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: Java

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        
        Sieve sieve = new Sieve(n);
        
        long ans = 0;
        for (int i = 1; i <= n; i++) {
            ans += (long)sieve.factorCount[i] * i;
        }
        System.out.println(ans);
    }
}

class Sieve {
    int[] minFactor;    // 最小の素因数

    Sieve(int n) {
        minFactor = new int[n + 1];
        Arrays.fill(minFactor, -1);
        
        for (int i = 2; i <= n; i++) {
            // 素数でないなら篩をかけない
            if (minFactor[i] != -1) continue;
            
            minFactor[i] = i;
            
            // 自分の倍数の最小の素因数を自分とする
            // (但し未確定の数に限る)
            for (int j = 2; i * j <= n; j++) {
                if (minFactor[i * j] == -1) {
                    minFactor[i * j] = i;
                }
            }
        }
    }
    
    boolean isPrime(int x) {
        if (minFactor[x] == x) {
            return true;
        }
        
        return false;
    }
    
    // nの素因数のリスト (60 => [2, 2, 3, 5])
    List<Integer> factorList(int x) {
        List<Integer> res = new ArrayList<Integer>();
        
        while (x != 1) {
            res.add(minFactor[x]);
            x /= minFactor[x];
        }
        
        return res;
    }
    
    // nの素因数の頻度 (60 => (2 => 2, 3 => 1, 5 => 1)
    Map<Integer, Integer> factorMap(int x) {
        Map<Integer, Integer> res = new HashMap<Integer, Integer>();
        
        List<Integer> factorList = factorList(x);
        
        for (Integer f : factorList) {
            int count = res.getOrDefault(f, 0);
            res.put(f, ++count);
        }
        
        // for (int i = 1; i <= x; i++) {
        //     if (!res.containsKey(i)) {
        //         res.put(i, 0);
        //     }
        // }
        
        return res;
    }
}

Compiler output:
Main.java:13: error: cannot find symbol
            ans += (long)sieve.factorCount[i] * i;
                              ^
  symbol:   variable factorCount
  location: variable sieve of type Sieve
1 error
Language: C++

#include<bits/stdc++.h>
#define INF 1e9
#define llINF 1e18
#define MOD 1000000007
#define pb push_back
#define mp make_pair 
#define F first
#define S second
#define ll long long
#define vi vector<ll>
#define vvi vector<vi>
#define BITLE(n) (1LL<<((ll)n))
#define SUBS(s,f,t) ((s).substr((f),(t)-(f)))
#define ALL(a) (a).begin(),(a).end()
#define Max(a) (*max_element(ALL(a)))
#define Min(a) (*min_element(ALL(a)))
using namespace std;
vi ans(1111111,1);
int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
ll n;cin>>n;
  for(ll i = 2;i <= n;i++){
    for(ll j = i;j < 1111111;j += i){
ans[j]++;
    }
  }
  ll an = 0;
  for(int i=1;i<=n:i++){
    an += i * ans[i];
  }
  cout<<an<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:29:15: warning: range-based 'for' loops with initializer only available with '-std=c++20' or '-std=gnu++20' [-Wc++20-extensions]
   29 |   for(int i=1;i<=n:i++){
      |               ^
a.cc:29:19: error: found ':' in nested-name-specifier, expected '::'
   29 |   for(int i=1;i<=n:i++){
      |                   ^
      |                   ::
a.cc:29:18: error: 'n' is not a class, namespace, or enumeration
   29 |   for(int i=1;i<=n:i++){
      |                  ^
a.cc:33:3: error: expected primary-expression before 'return'
   33 |   return 0;
      |   ^~~~~~
a.cc:32:18: error: expected ')' before 'return'
   32 |   cout<<an<<endl;
      |                  ^
      |                  )
   33 |   return 0;
      |   ~~~~~~          
a.cc:29:6: note: to match this '('
   29 |   for(int i=1;i<=n:i++){
      |      ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
ll c2(ll x) {
	return x * (x - 1) / 2;
}
void solve() {
	int n;
	scanf("%d", &n);
	ll ans = 0;
	for (int i = 1; i <= n; ++i) {
		int cou = n / i;
		ans += i * c2(cou + 1);
	}
	printf("%lld\n", ans);
}
int main() {
	solve();
}

Compiler output:
a.cc:3:1: error: 'll' does not name a type
    3 | ll c2(ll x) {
      | ^~
a.cc: In function 'void solve()':
a.cc:9:9: error: 'll' was not declared in this scope
    9 |         ll ans = 0;
      |         ^~
a.cc:12:17: error: 'ans' was not declared in this scope; did you mean 'abs'?
   12 |                 ans += i * c2(cou + 1);
      |                 ^~~
      |                 abs
a.cc:12:28: error: 'c2' was not declared in this scope
   12 |                 ans += i * c2(cou + 1);
      |                            ^~
a.cc:14:26: error: 'ans' was not declared in this scope; did you mean 'abs'?
   14 |         printf("%lld\n", ans);
      |                          ^~~
      |                          abs
Language: C++

#include "bits/stdc++.h"
using namespace std;
#define rep(i, n) for (ll i = 0; i < n; i++)
#define rep2(i, l, r) for (ll i = (l); i < (r); i++)
#define ALL(x) (x).begin(), (x).end()     //昇順
#define RALL(x) (x).rbegin(), (x).rend()  // 降順
#define pri(x) cout << (x) << "\n"
#define pri2(x, y) cout << (x) << " " << (y) << "\n"
#define pri3(x, y, z) cout << (x) << " " << (y) << " " << (z) << "\n"
const long long mod = 1e9 + 7;
typedef long long ll;
typedef priority_queue<int> PQ;
typedef vector<long long> VL; // VL a(n);
typedef vector<bool> VB;
typedef vector<double> VD;
typedef vector<string> VS;
typedef vector<char> VC;
typedef vector<VS> VSS;
typedef vector<VC> VCC;
typedef vector<VL> VLL; // VII a(n,VI(m)) n * m
typedef pair<ll, ll> PL;
typedef map<ll, ll> MP; // MP a;
typedef vector<pair<ll, ll>> PS; // PS a(n);

template <class T, class U>
bool chmax(T &a, U b) {
  if (a <= b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T, class U>
bool chmin(T &a, U b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
template <typename T>
ostream &operator<<(ostream &os, vector<T> &v) {
  os << "{";
  rep(i, (int)v.size()) { os << v[i] << (i < v.size() - 1 ? ", " : ""); }
  os << "}";
  return os;
}

// g++ -std=c++11 prac.cpp
// operator << (cout,a);
// chmin(min,a)
ll sum(ll n){return n*(n+1)/2;} 

int main() {
  ll n,k,m,x=0,y=0,z=0,cnt=0,h=0,w=0,ans=0,sum=0, Max=-1, Min=3e9+1;
  string s,t;
  cin >> n;
  for(int i=1; i<=n; i++){ // n=8のとき
    ans += sum(n/i)*i;    // 2+4+6+8 → 2(1+2+3+4)
  }                       // sum(8/3),つまりsum(2) → 3(1+2)
  pri(ans);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:59:15: error: 'sum' cannot be used as a function
   59 |     ans += sum(n/i)*i;    // 2+4+6+8 → 2(1+2+3+4)
      |            ~~~^~~~~
Language: C++

#include "bits/stdc++.h"
using namespace std;
#define rep(i, n) for (ll i = 0; i < n; i++)
#define rep2(i, l, r) for (ll i = (l); i < (r); i++)
#define ALL(x) (x).begin(), (x).end()     //昇順
#define RALL(x) (x).rbegin(), (x).rend()  // 降順
#define pri(x) cout << (x) << "\n"
#define pri2(x, y) cout << (x) << " " << (y) << "\n"
#define pri3(x, y, z) cout << (x) << " " << (y) << " " << (z) << "\n"
const long long mod = 1e9 + 7;
typedef long long ll;
typedef priority_queue<int> PQ;
typedef vector<long long> VL; // VL a(n);
typedef vector<bool> VB;
typedef vector<double> VD;
typedef vector<string> VS;
typedef vector<char> VC;
typedef vector<VS> VSS;
typedef vector<VC> VCC;
typedef vector<VL> VLL; // VII a(n,VI(m)) n * m
typedef pair<ll, ll> PL;
typedef map<ll, ll> MP; // MP a;
typedef vector<pair<ll, ll>> PS; // PS a(n);

template <class T, class U>
bool chmax(T &a, U b) {
  if (a <= b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T, class U>
bool chmin(T &a, U b) {
  if (a > b) {
    a = b;
    return 1;
  }
  return 0;
}
template <typename T>
ostream &operator<<(ostream &os, vector<T> &v) {
  os << "{";
  rep(i, (int)v.size()) { os << v[i] << (i < v.size() - 1 ? ", " : ""); }
  os << "}";
  return os;
}

// g++ -std=c++11 prac.cpp
// operator << (cout,a);
// chmin(min,a)
ll sum(ll n){return n*(n+1)/2;} 

int main() {
  ll n,k,m,x=0,y=0,z=0,cnt=0,h=0,w=0,ans=0,sum=0, Max=-1, Min=3e9+1;
  string s,t;
  cin >> n;
  for(int i=1; i<=n i++){ // n=8のとき
    ans += sum(n/i)*i;    // 2+4+6+8 → 2(1+2+3+4)
  }                       // sum(8/3),つまりsum(2) → 3(1+2)
  pri(ans);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:58:20: error: expected ';' before 'i'
   58 |   for(int i=1; i<=n i++){ // n=8のとき
      |                    ^~
      |                    ;
a.cc:59:15: error: 'sum' cannot be used as a function
   59 |     ans += sum(n/i)*i;    // 2+4+6+8 → 2(1+2+3+4)
      |            ~~~^~~~~
Language: C++

#include <bits/stdc++.h>
using ll = long long;
using namespace std;
constexpr int N = 1e7 + 10;

int div[N];

int main() {
	int n; cin >> n;
	for (int i = 1; i <= n; i++)
		for (int j = i; j <= n; j += i)
			++div[j];
	ll ans = 0;
	for (int i = 1; i <= n; i++)
		ans += i * div[i];
	cout << ans << "\n";
}

Compiler output:
a.cc:6:10: error: 'int div [10000010]' redeclared as different kind of entity
    6 | int div[N];
      |          ^
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:42,
                 from a.cc:1:
/usr/include/stdlib.h:992:14: note: previous declaration 'div_t div(int, int)'
  992 | extern div_t div (int __numer, int __denom)
      |              ^~~
a.cc: In function 'int main()':
a.cc:12:30: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   12 |                         ++div[j];
      |                              ^
a.cc:15:31: error: invalid types '<unresolved overloaded function type>[int]' for array subscript
   15 |                 ans += i * div[i];
      |                               ^
Language: C++

#include<stdio.h>
int main(){
	long long int n;
	scanf("%lld",&n);
	long long int a[n+1]={0};
	long long int i,j;
	for(i=1;i<=n;i++){
		for(j=i;j<=n;j+=i){
			a[j]+=1;
 
		}
	}
	long long int c=0;
	for(i=1;i<=n;i++)
	c+=i*a[i];

Compiler output:
a.cc: In function 'int main()':
a.cc:15:19: error: expected '}' at end of input
   15 |         c+=i*a[i];
      |                   ^
a.cc:2:11: note: to match this '{'
    2 | int main(){
      |           ^
Language: C

#include<stdio.h>
int main(){
	long long int n;
	scanf("%lld",&n);
	long long int a[n+1]={0};
	long long int i,j;
	for(i=1;i<=n;i++){
		for(j=i;j<=n;j+=i){
			a[j]+=1;

		}
	}
	long long int c=0;
	for(i=1;i<=n;i++)
	c+=i*a[i];
	printf("%lld",c);
	
}

Compiler output:
main.c: In function 'main':
main.c:5:30: error: variable-sized object may not be initialized except with an empty initializer
    5 |         long long int a[n+1]={0};
      |                              ^
Language: C++

// g++ -std=c++11 a.cpp
#include<iostream>
#include<vector>
#include<string>
#include<algorithm>
#include<map>
#include<set>
#include<unordered_map>
#include<utility>
#include<cmath>
#include<random>
#include<cstring>
#include<queue>
#include<stack>
#include<bitset>
#include<cstdio>
#include<sstream>
#include<random>
#include<iomanip>
#include<assert.h>
#include<typeinfo>
#define loop(i,a,b) for(long long i=a;i<b;i++)
#define rep(i,a) loop(i,0,a)
#define FOR(i,a) for(auto i:a)
#define pb push_back
#define all(in) in.begin(),in.end()
#define shosu(x) fixed<<setprecision(x)
#define show1d(v) {rep(_,v.size())cout<<" "<<v[_];cout<<endl;}
#define show2d(v) {rep(__,v.size())show1d(v[__]);}
using namespace std;
//kaewasuretyuui
typedef long long ll;
#define int ll
typedef int Def;
typedef pair<Def,Def> pii;
typedef vector<Def> vi;
typedef vector<vi> vvi;
typedef vector<pii> vp;
typedef vector<vp> vvp;
typedef vector<string> vs;
typedef vector<double> vd;
typedef vector<vd> vvd;
typedef pair<Def,pii> pip;
typedef vector<pip>vip;
#define mt make_tuple
typedef tuple<int,int,int> tp;
typedef vector<tp> vt;
typedef vector<vt>vvt;
template<typename A,typename B>bool cmin(A &a,const B &b){return a>b?(a=b,true):false;}
template<typename A,typename B>bool cmax(A &a,const B &b){return a<b?(a=b,true):false;}
const double PI=acos(-1);
const double EPS=1e-9;
Def inf = sizeof(Def) == sizeof(long long) ? 2e18 : 1e9+10;
int dx[]={-1,0,1,0};
int dy[]={0,1,0,-1};
#define yes cout<<"Yes\n"
#define no cout<<"No\n"


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

	int a;
	cin>>a;
	int out=0;

	loop(i,1,n+1){
        int c=a/i;
        out+=c*(c+1)/2*i;
	}
	cout<<out<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:68:18: error: 'n' was not declared in this scope
   68 |         loop(i,1,n+1){
      |                  ^
a.cc:22:41: note: in definition of macro 'loop'
   22 | #define loop(i,a,b) for(long long i=a;i<b;i++)
      |                                         ^
Language: C++

#include <bits/stdc++.h>
#define ss second
#define ff first
#define all(x) x.begin(), x.end()
 
using namespace std;
using ll = long long;
using pii = pair<ll, ll>;
 
const int oo = 1e9 + 7;
const int mod = 1e9 + 7, maxn = 1e7+1;
const long double PI = acos(-1);


int main (){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    ll n;
    scanf("%ll", &n);

    for (ll i=1; i<=n; i++){
        for (ll j=i; j<=n; j+=i){
            ans += j;
        }
    }

    printf("%lld\n", ans);
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   23 |             ans += j;
      |             ^~~
      |             abs
a.cc:27:22: error: 'ans' was not declared in this scope; did you mean 'abs'?
   27 |     printf("%lld\n", ans);
      |                      ^~~
      |                      abs
Language: C++

#include<algorithm>
#include<iostream>
#include<map>
#include <bits/stdc++.h>
#include<cmath>
#define mod 1000000007
#define ll long long 
using namespace std;
ll fac(ll yy)
{
	ll nn=0;
	for (ll i=1; i<=sqrt(yy); i++) 
    { 
        if (yy%i == 0) 
        { 
            // If divisors are equal, print only one 
            if (yy/i == i) 
                nn++; 
  
            else // Otherwise print both 
                nn=nn+2//printf("%d %d ", i, n/i); 
        } 
    } 
	return nn;
}
int main() {

 ll n;
 cin>>n;
 ll sum=0;
 for(ll i=1;i<=n;i++)
 {
 	ll xx=fac(i);
 	sum=sum+(xx*i);
 }
 cout<<sum<<endl;
	return 0;
}

Compiler output:
a.cc: In function 'long long int fac(long long int)':
a.cc:21:24: error: expected ';' before '}' token
   21 |                 nn=nn+2//printf("%d %d ", i, n/i);
      |                        ^
      |                        ;
   22 |         }
      |         ~
Language: C

#include <stdio.h>
using namespace std;
int N;
int i = 2;
int num;
int main()
{

  scanf("%d", &N);
  long long ans = (long long)N * (N + 1) - 1;

  for (; i * i <= N; i++)
  {
    num = N / i;
    ans += (long long)i * ((long long)num * num - i * i + num);
  }
  printf("%lld", ans);
}


Compiler output:
main.c:2:1: error: unknown type name 'using'
    2 | using namespace std;
      | ^~~~~
main.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    2 | using namespace std;
      |                 ^~~
Language: C

#include <stdio.h>

int main(void) {
  int n;
  scanf("%d", &n);
  long ans = 0;
  for(int i = 1;i <= n;i++) {
    for(j = 1;j <= n;j++) {
      if(i % j == 0) ans += 1;
    }
  }
  printf("%ld\n", ans);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:9: error: 'j' undeclared (first use in this function)
    8 |     for(j = 1;j <= n;j++) {
      |         ^
main.c:8:9: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

// https://atcoder.jp/contests/abc172/tasks/abc172_d
// #include <bits/stdc++.h>
#include <iostream>
#include <vector>
using namespace std;
#define int long long
#define REP(i, n) FOR(i, 0, n)
#define REPR(i, n) for (int i = n - 1; i >= 0; i--)
#define FOR(i, s, n) for (int i = (s), i##_len = (n); i < i##_len; ++i)
#define ALL(obj) (obj).begin(), (obj).end()
#define ALLR(obj) (obj).rbegin(), (obj).rend()
#define DIV(a, b) ((a - 1) / b + 1)

const int SZ = 1e7 + 1;
// 約数の個数
template <int_fast64_t max_N> struct Prime {
    int cnt[max_N] = {0};
    constexpr Prime() : cnt() {
        for (int_fast64_t i = 1; i < max_N; ++i) {
            for (int_fast64_t j = i; j < max_N; j += i)
                cnt[j]++;
        }
    }
};

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N;
    cin >> N;
    // １の倍数＋２の倍数＋３の倍数＋・・・
    constexpr auto d = Prime<SZ>();
    int ans = 0;
    FOR(i, 1, N + 1) { ans += d.cnt[i] * i; }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc:16:11: error: 'int_fast64_t' has not been declared
   16 | template <int_fast64_t max_N> struct Prime {
      |           ^~~~~~~~~~~~
a.cc:17:13: error: 'max_N' was not declared in this scope
   17 |     int cnt[max_N] = {0};
      |             ^~~~~
Language: C++

// https://atcoder.jp/contests/abc172/tasks/abc172_d
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define REP(i, n) FOR(i, 0, n)
#define REPR(i, n) for (int i = n - 1; i >= 0; i--)
#define FOR(i, s, n) for (int i = (s), i##_len = (n); i < i##_len; ++i)
#define ALL(obj) (obj).begin(), (obj).end()
#define ALLR(obj) (obj).rbegin(), (obj).rend()
#define DIV(a, b) ((a - 1) / b + 1)

const int SZ = 1e7 + 1;

// 約数の個数
template <int_fast64_t max_N> struct Prime {
    int cnt[SZ] = {0};
    constexpr Prime() : cnt() {
        for (int_fast64_t i = 1; i < SZ; ++i) {
            for (int_fast64_t j = i; j < SZ; j += i)
                cnt[j]++;
        }
    }
};

signed main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int N;
    cin >> N;
    // １の倍数＋２の倍数＋３の倍数＋・・・
    constexpr auto d = Prime<0>();
    int ans = 0;
    FOR(i, 1, N + 1) { ans += d.cnt[i] * i; }
    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:33:   in 'constexpr' expansion of 'Prime<0>()'
a.cc:19:13: error: 'constexpr' loop iteration count exceeds limit of 262144 (use '-fconstexpr-loop-limit=' to increase the limit)
   19 |             for (int_fast64_t j = i; j < SZ; j += i)
      |             ^~~
Language: C++

object Main extends App {
  val inputs: Seq[String] = scala.io.Source.stdin.getLines().toList
  val n = inputs.head.toInt

  println(solve(n))

  def solve(n: Int): Long = {
    var ans = 0L

    (1 to n).foreach { i =>
      (i to n by i).foreach { j =>
        ans = ans + j
      }
    }

    return nums.sum
  }
}


Compiler output:
a.cc:1:1: error: 'object' does not name a type
    1 | object Main extends App {
      | ^~~~~~
Language: C

#include <stdio.h>

int main(void)
{
    int n = 0;
    int a = 0;
    int b = 1;
    int c = 0;
    scanf_s("%d", &n);

    for (b; b <= n; b++)
    {
        for (int i = 1; i <= n; i++)
        {
            if (b % i == 0)
            {
                c++;
                printf("%d\n", c);
            }
        }
        a = a + c * b;
        c = c * 0;
    }
    printf("%d", a);
}

Compiler output:
main.c: In function 'main':
main.c:9:5: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    9 |     scanf_s("%d", &n);
      |     ^~~~~~~
      |     scanf