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

#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
  int64_t ans=0;
    unsigned long long int a;
    vector<int> f(a);
  while(cin>>a){
    vector <long long int> b;
    vector <long long int> array2;
    unsigned long long int sum=0;
    for (int k=1; k < a+1; k++) {
      for(long long int i=2;i<sqrt(k)+1;i++){
          if(k%i==0){
              b.push_back(i);
              if(i*i==k){
                  sum-=i;
              }
          }
      }
      long long int j=b.size();
      for(int i=0;i<j;i++){
          unsigned long long int h=k/b[i];
          b.push_back(h);
      }
      array2.push_back(1);
      for(long int i=0;i<b.size();i++){
          for(long int j=0,count1=0;j<array2.size();j++){
              if(b[i]==array2[j]){
                  break;
              }
              else{
                  count1++;
              }
              if(count1==array2.size()){
                  array2.push_back(b[i]);
              }
          }
      }
      for(int i=0;i<array2.size();i++){
          sum+=array2[i];
      }
      f(k)=sum;
    }
      for (int w=1; w < a+1; w++){
        ans=ans+w*f(w);
      }
      cout << ans << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:46:8: error: no match for call to '(std::vector<int>) (int&)'
   46 |       f(k)=sum;
      |       ~^~~
a.cc:49:20: error: no match for call to '(std::vector<int>) (int&)'
   49 |         ans=ans+w*f(w);
      |                   ~^~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int countDivisors(long long int n) {
  long long 1int i,j,cnt = 0;
   for ( i = 1; i * i <= n; i++) {
       if (n % i == 0) {
           j = n / i;
           cnt++;
           if (i != j) cnt++;
       }
   }
   return cnt;
}

int main()
{
    long long int a,b,c=0,i;
    cin>>a;
    for(i=1;i<=a;i++)
    {
        b=i*countDivisors(i);
        c+=b;
        //cout<<b<<" "<<endl;
    }
    cout<<c<<endl;
    return 0;
}



Compiler output:
a.cc: In function 'int countDivisors(long long int)':
a.cc:4:13: error: expected unqualified-id before numeric constant
    4 |   long long 1int i,j,cnt = 0;
      |             ^~~~
a.cc:5:10: error: 'i' was not declared in this scope
    5 |    for ( i = 1; i * i <= n; i++) {
      |          ^
a.cc:7:12: error: 'j' was not declared in this scope
    7 |            j = n / i;
      |            ^
a.cc:8:12: error: 'cnt' was not declared in this scope; did you mean 'int'?
    8 |            cnt++;
      |            ^~~
      |            int
a.cc:12:11: error: 'cnt' was not declared in this scope; did you mean 'int'?
   12 |    return cnt;
      |           ^~~
      |           int
Language: C++

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

int main(){
vector<long long> enum_divisors(long long N) {
    vector<long long> res;
    for (long long i = 1; i * i <= N; ++i) {
        if (N % i == 0) {
            res.push_back(i);
            // 重複しないならば i の相方である N/i も push
            if (N/i != i) res.push_back(N/i);
        }
    }
    // 小さい順に並び替える
    sort(res.begin(), res.end());
    return res;
}

int main() {
    long long N;
    cin >> N;
    const auto &res = enum_divisors(N);
    int ans=0;
	for(int i=0;i<res.size;++i;){
      ans += i*res[i];
    }
  cout<<ans;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:46: error: a function-definition is not allowed here before '{' token
    7 | vector<long long> enum_divisors(long long N) {
      |                                              ^
a.cc:21:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   21 | int main() {
      |         ^~
a.cc:21:9: note: remove parentheses to default-initialize a variable
   21 | int main() {
      |         ^~
      |         --
a.cc:21:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:21:12: error: a function-definition is not allowed here before '{' token
   21 | int main() {
      |            ^
a.cc:30:2: error: expected '}' at end of input
   30 | }
      |  ^
a.cc:6:11: note: to match this '{'
    6 | int main(){
      |           ^
Language: Java

import java.math.*;
import java.util.*;

public class Main {
	public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int K = sc.nextInt();
      
      long ans = 0;
      for (int i = 1; i <= K; i++) {
      	ans += (i * f(i));
      }
      
      System.out.println(ans);
    }
  
  	private long f(int num) {
      	int max = Math.sqrt(num);
      	int count = 1;
 		for (int i = 2; i <= Math.sqrt(num); i++) {
        	if (num % i == 0) {
              count++;
            }
        }
      	return count;
    }
}


Compiler output:
Main.java:11: error: non-static method f(int) cannot be referenced from a static context
      	ans += (i * f(i));
      	            ^
Main.java:18: error: incompatible types: possible lossy conversion from double to int
      	int max = Math.sqrt(num);
      	                   ^
2 errors
Language: C++

import sympy
N = int(input())
ans = 0
for i in range(N+1):
    ans += len(sympy.divisors(i)) * i
    # print(len(sympy.divisors(i)) * i)

print(ans)

Compiler output:
a.cc:6:7: error: invalid preprocessing directive #print
    6 |     # print(len(sympy.divisors(i)) * i)
      |       ^~~~~
a.cc:1:1: error: 'import' does not name a type
    1 | import sympy
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: Java

import java.math.*;

public class Main {
	public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int K = sc.nextInt();
      
      long ans = 0;
      for (int i = 1; i <= K; i++) {
      	ans += (i * f(i));
      }
      
      System.out.println(ans);
    }
  
  	private long f(int num) {
      	int max = Math.sqrt(num);
      	int count = 1;
 		for (int i = 2; i <= Math.sqrt(num); i++) {
        	if (num % i == 0) {
              count++;
            }
        }
      	return count;
    }
}

Compiler output:
Main.java:5: error: cannot find symbol
      Scanner sc = new Scanner(System.in);
      ^
  symbol:   class Scanner
  location: class Main
Main.java:5: error: cannot find symbol
      Scanner sc = new Scanner(System.in);
                       ^
  symbol:   class Scanner
  location: class Main
Main.java:10: error: non-static method f(int) cannot be referenced from a static context
      	ans += (i * f(i));
      	            ^
Main.java:17: error: incompatible types: possible lossy conversion from double to int
      	int max = Math.sqrt(num);
      	                   ^
4 errors
Language: Java

import java.util.*;
import java.io.*;
class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int N = Integer.parseInt(sc.next());
    ArrayList<int> ans = new ArrayList<int>();
    int sum = 0, cnt = 0;
    for(int i = 1, i <= N; i++){
      for(int j = 1; j <=i; j++){
        if(i /j == 0){
          for(int k = 0; ans.size();k++){
            if(j / ans.get(k)== 0){
              continue;
            }
            cnt++;
          }
        }
      }
      sum += i*cnt;
      cnt= 0;
    }
    PrintWriter out  = new PrintWriter(System.out);
    out.print(sum);
    out.flush();
  }
}

Compiler output:
Main.java:9: error: ';' expected
    for(int i = 1, i <= N; i++){
                    ^
Main.java:9: error: illegal start of expression
    for(int i = 1, i <= N; i++){
                     ^
2 errors
Language: C++

#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
  int64_t ans=0;
  vector<int> f(a);
    unsigned long long int a;
    while(cin>>a){
    vector <long long int> b;
    vector <long long int> array2;
    unsigned long long int sum=0;
    for (int k=1; k < a+1; k++) {
      for(long long int i=2;i<sqrt(k)+1;i++){
          if(k%i==0){
              b.push_back(i);
              if(i*i==k){
                  sum-=i;
              }
          }
      }
      long long int j=b.size();
      for(int i=0;i<j;i++){
          unsigned long long int h=k/b[i];
          b.push_back(h);
      }
      array2.push_back(1);
      for(long int i=0;i<b.size();i++){
          for(long int j=0,count1=0;j<array2.size();j++){
              if(b[i]==array2[j]){
                  break;
              }
              else{
                  count1++;
              }
              if(count1==array2.size()){
                  array2.push_back(b[i]);
              }
          }
      }
      for(int i=0;i<array2.size();i++){
          sum+=array2[i];
      }
      f(k)=sum;
    }
      for (int w=1; w < a+1; w++){
        ans=ans+w*f(w);
      }
      cout << ans << endl;
    }


Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'a' was not declared in this scope
    9 |   vector<int> f(a);
      |                 ^
a.cc:46:8: error: no match for call to '(std::vector<int>) (int&)'
   46 |       f(k)=sum;
      |       ~^~~
a.cc:49:20: error: no match for call to '(std::vector<int>) (int&)'
   49 |         ans=ans+w*f(w);
      |                   ~^~~
a.cc:52:6: error: expected '}' at end of input
   52 |     }
      |      ^
a.cc:7:1: note: to match this '{'
    7 | {
      | ^
Language: C++

#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
using namespace std;
int main()
{
  int64_t ans=0;
  vector<int> f(N);
    unsigned long long int a;
    while(cin>>a){
    vector <long long int> b;
    vector <long long int> array2;
    unsigned long long int sum=0;
    for (int k=1; k < a+1; k++) {
      for(long long int i=2;i<sqrt(k)+1;i++){
          if(k%i==0){
              b.push_back(i);
              if(i*i==k){
                  sum-=i;
              }
          }
      }
      long long int j=b.size();
      for(int i=0;i<j;i++){
          unsigned long long int h=k/b[i];
          b.push_back(h);
      }
      array2.push_back(1);
      for(long int i=0;i<b.size();i++){
          for(long int j=0,count1=0;j<array2.size();j++){
              if(b[i]==array2[j]){
                  break;
              }
              else{
                  count1++;
              }
              if(count1==array2.size()){
                  array2.push_back(b[i]);
              }
          }
      }
      for(int i=0;i<array2.size();i++){
          sum+=array2[i];
      }
      f(k)=sum;
    }
      for (int w=1; w < a+1; w++){
        ans=ans+w*f(w);
      }
      cout << ans << endl;
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: 'N' was not declared in this scope
    9 |   vector<int> f(N);
      |                 ^
a.cc:46:8: error: no match for call to '(std::vector<int>) (int&)'
   46 |       f(k)=sum;
      |       ~^~~
a.cc:49:20: error: no match for call to '(std::vector<int>) (int&)'
   49 |         ans=ans+w*f(w);
      |                   ~^~~
a.cc:52:6: error: expected '}' at end of input
   52 |     }
      |      ^
a.cc:7:1: note: to match this '{'
    7 | {
      | ^
Language: C++

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

int main(){
vector<long long> enum_divisors(long long N) {
    vector<long long> res;
    for (long long i = 1; i * i <= N; ++i) {
        if (N % i == 0) {
            res.push_back(i);
            // 重複しないならば i の相方である N/i も push
            if (N/i != i) res.push_back(N/i);
        }
    }
    // 小さい順に並び替える
    sort(res.begin(), res.end());
    return res;
}

int main() {
    long long N;
    cin >> N;
    const auto &res = enum_divisors(N);
    int ans=0;
	for(int i=0;i<res.size;++i;){
      ans += i*res[i];
    }
  cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:46: error: a function-definition is not allowed here before '{' token
    5 | vector<long long> enum_divisors(long long N) {
      |                                              ^
a.cc:19:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   19 | int main() {
      |         ^~
a.cc:19:9: note: remove parentheses to default-initialize a variable
   19 | int main() {
      |         ^~
      |         --
a.cc:19:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:19:12: error: a function-definition is not allowed here before '{' token
   19 | int main() {
      |            ^
a.cc:28:2: error: expected '}' at end of input
   28 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

n = int(input())

answer = [0 for i in range(0, n+1)]
answer[1] = 1

small_factors = [1]
p = 1
while (p < n):
    p = p + 1
    if answer[p] is 0:
        #print("\n\nPrime: " + str(p))
        limit = n / p
        new_small_factors = []
        for i in small_factors:
            j = i
            while j <= limit:
                new_small_factors.append(j)
                answer[j * p] = answer[j] + answer[i]
                j = j * p
        small_factors = new_small_factors
ans = 0;
for i,k in enumerate(answer):
    if k==None:
        continue
    ans+=((i)*(k))
print(ans)         
 

Compiler output:
a.cc:11:10: error: invalid preprocessing directive #print
   11 |         #print("\n\nPrime: " + str(p))
      |          ^~~~~
a.cc:1:1: error: 'n' does not name a type
    1 | n = int(input())
      | ^
a.cc:22:1: error: expected unqualified-id before 'for'
   22 | for i,k in enumerate(answer):
      | ^~~
Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); ++i)
using namespace std;
const int INF = 100000000;
const int MAX_N = 100;
typedef pair<int , int> P;
typedef long long ll;

int main () {
  ll N;
  cin >> N;
  ll ans = 0;
  // int C[N+10] = {0};
  for (ll i = 1; i <= N; ++i) {
    ll count = 0;
    for (ll j = 1; j * j <= i; ++j) {
      if (i % j == 0) {
        ++count;
        if (i / j != j) {
          ++count;
        }
      }
    }
    C[i] = count;
    // printf("%lld\n", count);
    ans += i * count;
  }
  printf("%lld\n", ans);
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:5: error: 'C' was not declared in this scope
   24 |     C[i] = count;
      |     ^
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in){
          int k = sc.nextInt();
          int sum = 0;
          if(k == 1){
          	System.out.println(k);	
          }
          for(int i=1; i<=k; i++){
          	  sum = sum + (i*i);
          }
          System.out.println(sum);
        }
    }
}

Compiler output:
Main.java:7: error: illegal start of type
          if(k == 1){
          ^
Main.java:7: error: <identifier> expected
          if(k == 1){
              ^
Main.java:10: error: illegal start of type
          for(int i=1; i<=k; i++){
          ^
Main.java:10: error: <identifier> expected
          for(int i=1; i<=k; i++){
                        ^
Main.java:10: error: <identifier> expected
          for(int i=1; i<=k; i++){
                           ^
Main.java:10: error: <identifier> expected
          for(int i=1; i<=k; i++){
                              ^
Main.java:13: error: <identifier> expected
          System.out.println(sum);
                            ^
Main.java:13: error: <identifier> expected
          System.out.println(sum);
                                ^
Main.java:14: error: ';' expected
        }
         ^
9 errors
Language: C++

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

int main() {
  int n;
  cin >> n;
  vector<int> b(n+1,0);
  for (int i = 1; i < (n+1); ++i){
    int k=i;
    while (k<=n){
      b[k]++;
      k+=i;
    }
  }
  __int64 res=0;
  rep(i,n+1) {
    __int64 a=i;
    __int64 c=b[i];
    res+=(a*c);
  }
  cout << res << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:3: error: '__int64' was not declared in this scope; did you mean '__ynf64'?
   18 |   __int64 res=0;
      |   ^~~~~~~
      |   __ynf64
a.cc:20:12: error: expected ';' before 'a'
   20 |     __int64 a=i;
      |            ^~
      |            ;
a.cc:21:12: error: expected ';' before 'c'
   21 |     __int64 c=b[i];
      |            ^~
      |            ;
a.cc:22:5: error: 'res' was not declared in this scope; did you mean 'rep'?
   22 |     res+=(a*c);
      |     ^~~
      |     rep
a.cc:22:11: error: 'a' was not declared in this scope
   22 |     res+=(a*c);
      |           ^
a.cc:22:13: error: 'c' was not declared in this scope
   22 |     res+=(a*c);
      |             ^
a.cc:24:11: error: 'res' was not declared in this scope; did you mean 'rep'?
   24 |   cout << res << endl;
      |           ^~~
      |           rep
Language: C++

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

int f(int a) {
  int ans = 1;

  for (int i = 2; i <= sqrt(a); i++) {
    int cnt = 0;
    while (a % i == 0) {
      cnt++;
      a /= i;
    }
    ans *= (cnt + 1);
    if (a == 1) break;
  }
  if (a != 1) ans *= 2;

  cout << ans;
  return 0;
}

int main(){
    int n;
    cin >> n;
    int count = 0;
    for(int i = 1; i <= n; i++){
        count += i*f(i)
    }
    cout << count << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:24: error: expected ';' before '}' token
   28 |         count += i*f(i)
      |                        ^
      |                        ;
   29 |     }
      |     ~
Language: C++

#include"bits/stdc++.h"
#include<math.h>
#include<vector>
#include<algorithm>
using namespace std;
int64_t i,j,k;//preparation for
int g(int64_t n){
    int64_t p;//divisor_function
    double q,r;
    int a[n];
    int64_t m;
    r=sqrt(n);
    p=0;
    m=n;
    fill(a,a+n,1);
    for(i=2;i<n;i++){//find p
        while(m%i=0){
            a[i]+=1;
            m/=i;
        }
    }
    for(i=1;i<n;i++){
        p*=a[i];
    }

    return p;
}
int main(){
    int64_t N,S;
    cin>>N;
    S=0;
    for(i=1;i<=N;i++){
        S+=i*g(i);
    }
    
    cout<<S;
    return 0;
}

Compiler output:
a.cc: In function 'int g(int64_t)':
a.cc:17:16: error: lvalue required as left operand of assignment
   17 |         while(m%i=0){
      |               ~^~
Language: C++

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

vector<pair<long long, long long> >prime_factorize(long long N) {
  vector<pair<long long, long long> > res;
  for (long long a = 2; a*a <= N; ++a) {
    if (N % a != 0) continue;
    long long ex = 0;
    while (N % a == 0) {
      ++ex;
      N /= a;
    }
    res.push_back({a,ex});
  }
  if (N != 1) res.push_back({N,1});
  return res;
}
int main() {
  long long N;
  cin >> N;
  const auto &res = prime_factorize(N);

Compiler output:
a.cc: In function 'int main()':
a.cc:23:40: error: expected '}' at end of input
   23 |   const auto &res = prime_factorize(N);
      |                                        ^
a.cc:20:12: note: to match this '{'
   20 | int main() {
      |            ^
Language: C++

#include"bits/stdc++.h"
#include<math.h>
#include<vector>
#include<algorithm>
using namespace std;
int64_t i,j,k;//preparation for
int g(int64_t n){
    int64_t p;//divisor_function
    double q,r;
    int a[n];
    int64_t m;
    r=sqrt(n);
    p=0;
    m=n;
    fill(a,a+n,1);
    for(i=2;i<n;i++){//find p
        while(m%i=0){
            a[i]+=1;
            m/=i;
        }
    }
    for(i=1;i<n;i++){
        p*=a[i]
    }

    return p;
}
int main(){
    int64_t N,S;
    cin>>N;
    S=0;
    for(i=1;i<=N;i++){
        S+=i*g(i);
    }
    
    cout<<S;
    return 0;
}

Compiler output:
a.cc: In function 'int g(int64_t)':
a.cc:17:16: error: lvalue required as left operand of assignment
   17 |         while(m%i=0){
      |               ~^~
a.cc:23:16: error: expected ';' before '}' token
   23 |         p*=a[i]
      |                ^
      |                ;
   24 |     }
      |     ~
Language: C++

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <cmath>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
typedef long long ll;

ll x(ll n){
    vector<ll> x(n + 1);
    ll ans=1;
	ll num = n; // 素因数分解する変数num 

	for (int i = 2; i <= n; i++) {
		while (num%i == 0) { // 素数で割り切れなくなるまで割っていく
			x.at(i)++;　//割った個数を配列に足す
			num /= i;
		}
	}

	for (int i = 2; i <= n; i++)
	{	
		ans *= x.at(i) + 1;//それぞれを+1して掛けていく
	}
	return ans;
}
int main(void){
    ll n;
    cin>>n;
    ll s=0;
    for(int i=1;i<n+1;i++){
        s+=i*x(i);
    }
    cout<<s<<endl;
}

Compiler output:
a.cc:21:35: error: extended character 　 is not valid in an identifier
   21 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^
a.cc: In function 'll x(ll)':
a.cc:21:35: error: '\U00003000' was not declared in this scope
   21 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^~
Language: C++


#include<stdio.h>
#include<iostream>
#include<vector>
#include<math.h>
#include<queue>
#include<map>
#include<algorithm>
#include<string.h>
#include<functional>
#include<limits.h>
#include<stdlib.h>
#include<string>
#include<unordered_map>
using namespace std;
 
#define intmax INT_MAX
#define lmax LONG_MAX
#define uintmax UINT_MAX
#define ulmax ULONG_MAX
#define llmax LLONG_MAX
#define ll long long
#define rep(i,a,N) for((i)=(a);(i)<(N);(i)++)
#define rrp(i,N,a) for((i)=(N)-1;(i)>=(a);(i)--)
#define llfor ll i,j,k
#define sc(a) cin>>a
#define pr(a) cout<<a<<endl
#define pY puts("YES")
#define pN puts("NO")
#define py puts("Yes")
#define pn puts("No")
#define pnn printf("\n")
#define sort(a) sort(a.begin(),a.end())
#define push(a,b) (a).push_back(b)
#define llvec vector<vector<ll>>
#define charvec vector<vector<char>>
#define sizeoof(a,b) (a,vector<ll>(b))
#define llpvec vector<pair<ll,ll>>
/*繰り上げ除算*/ll cei(ll x,ll y){ll ans=x/y;if(x%y!=0)ans++;return ans;}
/*最大公約数*/ll gcd(ll x,ll y){return y?gcd(y,x%y):x;}
/*最小公倍数*/ll lcm(ll x,ll y){return x/gcd(x,y)*y;}
/*n乗*/ll llpow(ll x,ll n){ll i,ans=1;rep(i,0,n)ans*=x;return ans;}
/*階乗*/ll fact(ll x){ll i,ans=1;rep(i,0,x)ans*=(x-i);return ans;}
/*nCr*/ll ncr(ll n,ll r){return fact(n)/fact(r)/fact(n-r);}
/*nPr*/ll npr(ll n,ll r){return fact(n)/fact(n-r);}
/*primejudge*/bool prime(ll a){if(a<=1)return false;ll i;for(i=2;i*i<=a;i++){if(a%i==0)return false;}return true;}
ll ans=0;llfor;///////////////////////////////////////////////////////////

#include<iostream>
#include <vector>

using namespace std;

int div(int n)
{
	//int n;
	int ans = 1;
	cin >> n;

	vector<int> x(n + 1);
	int num = n; // 素因数分解する変数num 

	for (int i = 2; i <= n; i++) {
		while (num%i == 0) { // 素数で割り切れなくなるまで割っていく
			x.at(i)++; //割った個数を配列に足す
			num /= i;
		}
	}

	for (int i = 2; i <= n; i++)
	{	
		ans *= x.at(i) + 1; //それぞれを+1して掛けていく
	}
	//cout << ans << endl;
	return ans;
}

Xint main(){
  long long N;
  cin>>N;
  
  vector<long long> ans(10000010);
  
  for(int i=0;i<N;i++){
    ans.at(i)=div(i+1);
  }
  
  long long A=0;
  
  for(int i=0;i<N;i++){
    A+=(i+1)*ans.at(i);
  }
  cout<<A;
  
return 0;}

Compiler output:
a.cc:78:1: error: 'Xint' does not name a type; did you mean 'uint'?
   78 | Xint main(){
      | ^~~~
      | uint
Language: C++

#ifdef LOCAL
 #include <P.hpp>
 #include <debugger.hpp>
 #define __int64 __int64_t
#else 
 #include <bits/stdc++.h>
 #define debug(a...) //
 // #define __int64 long long int
#endif
using namespace std;

const int maxn = 1e7 + 1;
bitset<maxn> is_prime;
vector<__int64> ans(maxn , 1);

__int64 p(int j , int i) {
 __int64 ret = 0;
 while(j % i == 0) j /= i , ret++;
 return ret;
}

void seive()
{
 is_prime.set();
 is_prime[1] = false;
 for(int i = 2; i < maxn; i++) {
  if(is_prime[i]) {
   for(int j = i; j < maxn; j += i) {
    if(j != i) is_prime[j] = false;
    ans[j] *= (p(j , i) + 1);
   }
  }
 }
}

int main()
{
 ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
 seive();
 for(int i = 1; i < 10; i++) debug(i , ans[i]);
 vector<__int64> dp(maxn);
 for(int i = 1; i < maxn; i++) {
  dp[i] += dp[i - 1] + (i * ans[i]);
 }
 int n;
 cin >> n;
 cout << dp[n] << '\n';
 return 0;
}


Compiler output:
a.cc:14:8: error: '__int64' was not declared in this scope; did you mean '__ynf64'?
   14 | vector<__int64> ans(maxn , 1);
      |        ^~~~~~~
      |        __ynf64
a.cc:14:15: error: template argument 1 is invalid
   14 | vector<__int64> ans(maxn , 1);
      |               ^
a.cc:14:15: error: template argument 2 is invalid
a.cc:14:29: error: expression list treated as compound expression in initializer [-fpermissive]
   14 | vector<__int64> ans(maxn , 1);
      |                             ^
a.cc:16:1: error: '__int64' does not name a type; did you mean '__int64_t'?
   16 | __int64 p(int j , int i) {
      | ^~~~~~~
      | __int64_t
a.cc: In function 'void seive()':
a.cc:30:8: error: invalid types 'int[int]' for array subscript
   30 |     ans[j] *= (p(j , i) + 1);
      |        ^
a.cc:30:16: error: 'p' was not declared in this scope
   30 |     ans[j] *= (p(j , i) + 1);
      |                ^
a.cc: In function 'int main()':
a.cc:41:9: error: '__int64' was not declared in this scope; did you mean '__ynf64'?
   41 |  vector<__int64> dp(maxn);
      |         ^~~~~~~
      |         __ynf64
a.cc:41:16: error: template argument 1 is invalid
   41 |  vector<__int64> dp(maxn);
      |                ^
a.cc:41:16: error: template argument 2 is invalid
a.cc:43:5: error: invalid types 'int[int]' for array subscript
   43 |   dp[i] += dp[i - 1] + (i * ans[i]);
      |     ^
a.cc:43:14: error: invalid types 'int[int]' for array subscript
   43 |   dp[i] += dp[i - 1] + (i * ans[i]);
      |              ^
a.cc:43:32: error: invalid types 'int[int]' for array subscript
   43 |   dp[i] += dp[i - 1] + (i * ans[i]);
      |                                ^
a.cc:47:12: error: invalid types 'int[int]' for array subscript
   47 |  cout << dp[n] << '\n';
      |            ^
Language: C++

#include <iostream>
#include <vector>
#include <map>
#include <cmath>
#include <algorithm>
using namespace std;


typedef long long ll;
#define CIN_I(a) ll a;cin>>a;
#define REP(i,n) for(ll i=0;i<(ll)(n);i++)
#define FOR(s,i,n) for(ll i=s;i<(ll)(n);i++)

ll yakusuu(ll n) {
	ll ans = 0;
	FOR(1, i, sqrt(n)) {
    if (n%i==0) ans++;
  }
  ans *= 2;
  if (n%sqrt(n)==0) ans++;
	return ans;
}

int main() {
  CIN_I(N);
  ll res = 0;
  FOR(1, K, N+1) {
    res += K * yakusuu(K);
  }
  cout << res << endl;
}


Compiler output:
a.cc: In function 'll yakusuu(ll)':
a.cc:20:8: error: invalid operands of types 'll' {aka 'long long int'} and '__gnu_cxx::__enable_if<true, double>::__type' {aka 'double'} to binary 'operator%'
   20 |   if (n%sqrt(n)==0) ans++;
      |       ~^~~~~~~~
      |       |     |
      |       |     __gnu_cxx::__enable_if<true, double>::__type {aka double}
      |       ll {aka long long int}
Language: C++

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <cmath>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
#include <cmath>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
typedef long long ll;

ll x(ll n){
    vector<int> x(n + 1);
    ll ans=1;
	ll num = n; // 素因数分解する変数num 

	for (int i = 2; i <= n; i++) {
		while (num%i == 0) { // 素数で割り切れなくなるまで割っていく
			x.at(i)++;　//割った個数を配列に足す
			num /= i;
		}
	}

	for (int i = 2; i <= n; i++)
	{	
		ans *= x.at(i) + 1;//それぞれを+1して掛けていく
	}
	return ans;
}
int main(void){
    ll n;
    cin>>n;
    ll s=0;
    for(int i=1;i<n+1;i++){
        s+=i*x(i);
    }
    cout<<s<<endl;
}

Compiler output:
a.cc:21:35: error: extended character 　 is not valid in an identifier
   21 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^
a.cc: In function 'll x(ll)':
a.cc:21:35: error: '\U00003000' was not declared in this scope
   21 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:6:3: error: expected ',' or ';' before 'cin'
    6 |   cin<<n;
      |   ^~~
a.cc:9:12: error: expected ';' before 'for'
    9 |     count=0
      |            ^
      |            ;
   10 |     for(int j=1;j<=i;j++)
      |     ~~~     
a.cc:10:17: error: 'j' was not declared in this scope
   10 |     for(int j=1;j<=i;j++)
      |                 ^
Language: Java

import java.io.BufferedReader; 
import java.io.*;
import java.io.InputStreamReader; 
import java.util.Scanner; 
import java.util.StringTokenizer; 
import java.util.*;
import java.math.*;
import javafx.util.Pair;
public class Main 
{ 
    static class FastReader 
    { 
        BufferedReader br; 
        StringTokenizer st; 
  
        public FastReader()
        { 
            br = new BufferedReader(new
                     InputStreamReader(System.in)); 
        } 
  
        String next()
        { 
            while (st == null || !st.hasMoreElements()) 
            { 
                try
                { 
                    st = new StringTokenizer(br.readLine()); 
                } 
                catch (IOException  e) 
                { 
                    e.printStackTrace(); 
                } 
            } 
            return st.nextToken(); 
        } 
  
        int nextInt() 
        { 
            return Integer.parseInt(next()); 
        } 
  
        long nextLong() 
        { 
            return Long.parseLong(next()); 
        } 
  
        double nextDouble() 
        { 
            return Double.parseDouble(next()); 
        } 
  
        String nextLine() 
        { 
            String str = ""; 
            try
            { 
                str = br.readLine();
            } 
            catch (IOException e) 
            { 
                e.printStackTrace(); 
            } 
            return str; 
        } 
    } 
   public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        PrintWriter pw=new PrintWriter(System.out);
        int t=1;//sc.nextInt();
        long ans = 0;
        while(t-->0)
        {
        int n=sc.nextInt();
        for(int i=1;i<=n;i++)
        {
            ans+=i*nof(i);
        }
        pw.println(ans);
        }
           pw.close();
    }
    static int nof(int m)
    {
        Set<Integer> hs=new HashSet<>();
        for(int k=1;k<=Math.sqrt(m);k++)
        {
            if(m%k==0) {
                hs.add(k);
                hs.add(m/k);
            }
        }
        return hs.size();
    }
}
  

Compiler output:
Main.java:8: error: package javafx.util does not exist
import javafx.util.Pair;
                  ^
1 error
Language: C++

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

vector<pair<long long, long long> >prime_factorize(long long N) {
  vector<pair<long long, long long> > res;
  for (long long a = 2; a*a <= N; ++a) {
    if (N % a != 0) continue;
    long long ex = 0;
    

Compiler output:
a.cc: In function 'std::vector<std::pair<long long int, long long int> > prime_factorize(long long int)':
a.cc:10:22: error: expected '}' at end of input
   10 |     long long ex = 0;
      |                      ^
a.cc:8:40: note: to match this '{'
    8 |   for (long long a = 2; a*a <= N; ++a) {
      |                                        ^
a.cc:10:22: error: expected '}' at end of input
   10 |     long long ex = 0;
      |                      ^
a.cc:6:65: note: to match this '{'
    6 | vector<pair<long long, long long> >prime_factorize(long long N) {
      |                                                                 ^
a.cc:10:22: warning: no return statement in function returning non-void [-Wreturn-type]
   10 |     long long ex = 0;
      |                      ^
Language: C++

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


int yakusuu(int n){
  int ans = 1;
  
  for(int i=2;i<= sqrt(n);i++){
    int cnt = 0;
    while(n % i == 0){
      cnt++;
      n /= i;
    }
   ans *= (cnt + 1);
    if(n == 1){
      break;
    }
    if(n != 1){
      ans *= 2;
    }
    
return ans;
}

  
  
int main(){
  int n;
  cin >> n;
  int a=0;
  for(int i=1;i<n+1;i++){
    a += ((i*i+i * yakusuu(i))/2;
  }
  cout << a << endl;
}

  


Compiler output:
a.cc: In function 'int yakusuu(int)':
a.cc:27:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   27 | int main(){
      |         ^~
a.cc:27:9: note: remove parentheses to default-initialize a variable
   27 | int main(){
      |         ^~
      |         --
a.cc:27:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:27:11: error: a function-definition is not allowed here before '{' token
   27 | int main(){
      |           ^
a.cc:35:2: error: expected '}' at end of input
   35 | }
      |  ^
a.cc:5:19: note: to match this '{'
    5 | int yakusuu(int n){
      |                   ^
a.cc:35:2: warning: control reaches end of non-void function [-Wreturn-type]
   35 | }
      |  ^
Language: Java

import java.util.Arrays;
import java.util.Scanner;
import java.util.Stack;

public class Main {

    static int divCount(int n)
    {
        boolean hash[] = new boolean[n + 1];
        Arrays.fill(hash, true);
        for (int p = 2; p * p < n; p++)
            if (hash[p] == true)
                for (int i = p * 2; i < n; i += p)
                    hash[i] = false;

        int total = 1;
        for (int p = 2; p <= n; p++)
        {
            if (hash[p])
            { int count = 0;
                if (n % p == 0)
                {
                    while (n % p == 0)
                    {
                        n = n / p;
                        count++;
                    }
                    total = total * (count + 1);
                }
            }
        }
        return total;
    }
    static Stack printDivisors(int n)
    {
        Stack<Integer> s= new Stack<>();
        // Note that this loop runs till square root
        for (int i=1; i<=Math.sqrt(n); i++)
        {
            if (n%i==0)
            {
                // If divisors are equal, print only one
                if (n/i == i)
//                    System.out.printf("%d ", i);
                    s.push(i)

                else // Otherwise print both
//                    System.out.printf("%d %d ", i, n/i);
                s.push(i);
            }
        }
        return s;
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        long sum=0;
        for (int i = 1; i <= n; i++) {
            sum+=i*divCount(i);

        }
        System.out.println(sum);
    }
}

Compiler output:
Main.java:45: error: ';' expected
                    s.push(i)
                             ^
1 error
Language: C++

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

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

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


int yakusuu(int n){
  int ans = 1;
  
  for(int i=2;i<= sqrt(n);i++){
    int cnt = 0;
    while(n % i == 0){
      cnt++;
      n /= i;
    }
   ans *= (cnt + 1);
    if(n == 1){
      break;
    }
    if(n != 1){
      ans *= 2
    }
    
return ans;
}

  
  
int main(){
  int n;
  cin >> n;
  int a=0;
  for(int i=1;i<n+1;i++){
    a += ((i*i+i * yakusuu(i))/2;
  }
  cout << a << endl;
}

  


Compiler output:
a.cc: In function 'int yakusuu(int)':
a.cc:19:15: error: expected ';' before '}' token
   19 |       ans *= 2
      |               ^
      |               ;
   20 |     }
      |     ~          
a.cc:27:9: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   27 | int main(){
      |         ^~
a.cc:27:9: note: remove parentheses to default-initialize a variable
   27 | int main(){
      |         ^~
      |         --
a.cc:27:9: note: or replace parentheses with braces to value-initialize a variable
a.cc:27:11: error: a function-definition is not allowed here before '{' token
   27 | int main(){
      |           ^
a.cc:35:2: error: expected '}' at end of input
   35 | }
      |  ^
a.cc:5:19: note: to match this '{'
    5 | int yakusuu(int n){
      |                   ^
a.cc:35:2: warning: control reaches end of non-void function [-Wreturn-type]
   35 | }
      |  ^
Language: C++

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

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

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long a;
  cin>>a;
  long long s=0;d[a];
  for(int i=0;i<a;i++){
    d[i]=a;
    a-=1;
    s+=d[i];
  }
  cout<<d[i];
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: 'd' was not declared in this scope
    6 |   long long s=0;d[a];
      |                 ^
a.cc:12:11: error: 'i' was not declared in this scope
   12 |   cout<<d[i];
      |           ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long a;
  cin>>a;
  long long s=0;d[a];
  for(int i=0;i<a;i++){
    d[i]=a;
    a-=1;
    s+=d[i];
  }
  cout<<d[i];
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:17: error: 'd' was not declared in this scope
    6 |   long long s=0;d[a];
      |                 ^
a.cc:12:11: error: 'i' was not declared in this scope
   12 |   cout<<d[i];
      |           ^
Language: C++

#include<bits/stdc++.h>


using namespace std;

long int f(int n)
{
	int n;
	int ans = 1;
	cin >> n;

	vector<int> x(n + 1);
	int num = n; // 素因数分解する変数num 

	for (int i = 2; i <= n; i++) {
		while (num%i == 0) { // 素数で割り切れなくなるまで割っていく
			x.at(i)++;　//割った個数を配列に足す
			num /= i;
		}
	}

	for (int i = 2; i <= n; i++)
	{	
		ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
	}
	return ans;
}
int main(){
  long long int n,ans;
  cin>>n;
  for(int i=1;i<=n;i++){
    ans+=i*f(i);
  }
  cout<<ans<<endl;
}
  

Compiler output:
a.cc:17:35: error: extended character 　 is not valid in an identifier
   17 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^
a.cc:24:36: error: extended character 　 is not valid in an identifier
   24 |                 ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
      |                                    ^
a.cc: In function 'long int f(int)':
a.cc:8:13: error: declaration of 'int n' shadows a parameter
    8 |         int n;
      |             ^
a.cc:6:16: note: 'int n' previously declared here
    6 | long int f(int n)
      |            ~~~~^
a.cc:17:35: error: '\U00003000' was not declared in this scope
   17 |                         x.at(i)++;　//割った個数を配列に足す
      |                                   ^~
a.cc:24:36: error: '\U00003000' was not declared in this scope
   24 |                 ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
      |                                    ^~
Language: C++

#include <iostream>
#include <vector>
#include <map>
#include <cmath>
#include <algorithm>
using namespace std;


typedef long long ll;
#define CIN_I(a) ll a;cin>>a;
#define REP(i,n) for(ll i=0;i<(ll)(n);i++)
#define FOR(s,i,n) for(ll i=s;i<(ll)(n+1);i++)

int main() {
  CIN_I(N);
  ll res = 0;
  FOR(1, K, N) {
    res += K * yakusuu(K);
  }
  cout << res << endl;
}
ll yakusuu(ll n)
{
	ll ans = 1;
	vector<ll> x(n + 1);
	ll num = n;
	for (ll i = 2; i <= n; i++) {
		while (num%i == 0) {
			x.at(i)++;
			num /= i;
		}
	}
	for (ll i = 2; i <= n; i++) {	
		ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
	}
	return ans;
}

Compiler output:
a.cc:34:36: error: extended character 　 is not valid in an identifier
   34 |                 ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
      |                                    ^
a.cc: In function 'int main()':
a.cc:18:16: error: 'yakusuu' was not declared in this scope
   18 |     res += K * yakusuu(K);
      |                ^~~~~~~
a.cc: In function 'll yakusuu(ll)':
a.cc:34:36: error: '\U00003000' was not declared in this scope
   34 |                 ans *= x.at(i) + 1;　//それぞれを+1して掛けていく
      |                                    ^~
Language: C

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

long long int f(long long int n) 
{ 
    long long int cnt = 0; 
    for (long long int i = 1; i <= sqrt(n); i++) { 
        if (n % i == 0) { 
            // If divisors are equal, 
            // count only one 
            if (n / i == i) 
                cnt++; 
  
            else // Otherwise count both 
                cnt = cnt + 2; 
        } 
    } 
    return cnt; 
} 

int main() {
	long long int n,sum=0;
	for(long long int i=1;i<=n;i++){
		sum+= i*f(i);
	}
	cout<<sum;
	return 0;
}

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

#include <bits/stdc++.h>
#define fastio ios::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define display(v) for (auto x : v) cout << x << ", "
#define print(x) cout << (#x) << " = [ ";display(x); cout << "]\n"
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define ceel(x, y) ((x) / (y) + !((x) % (y) == 0))
#define ss second
#define ff first
#define pb push_back
typedef long long int ll;
typedef unsigned long long int ull;
using namespace std;
 
// DEBUG TEMPLATE by livw
void __print(int x) {cout << x;}
void __print(long long x) {cout << x;}
void __print(double x) {cout << x;}
void __print(long double x) {cout << x;}
void __print(char x) {cout << '\'' << x << '\'';}
void __print(const string &x) {cout << '\"' << x << '\"';}
void __print(bool x) {cout << (x ? "true" : "false");}
 
template<typename T, typename V>
void __print(const pair<T, V> &x) {cout << '{'; __print(x.first); cout << ','; __print(x.second); cout << '}';}
template<typename T>
void __print(const T &x) {int f = 0; cout << '{'; for (auto &i: x) cout << (f++ ? "," : ""), __print(i); cout << "}";}
void _print() {cout << "]\n";}
template <typename T, typename... V>
void _print(T t, V... v) {__print(t); if (sizeof...(v)) cout << ", "; _print(v...);}
#ifdef INCLUDEWHENOFFLINE
#define debug(x...) cout << "[" << #x << "] = ["; _print(x)
#else
#define debug(x...)
#endif

const int len = 1e7 + 10;
ll cnt[len];

int main()
{
    fastio;
    fill(cnt, cnt + len, 0);
    for (int i = 1; i < len; i++)
    {
        for (int j = i; j < len; j += i)
        {
            cnt[j] += 1;
        }
    }
    ll k;
    cin >> k;
    ll ans = 0;
    for (ll i = 1; i <= k; i++)
    {
        ans += i * cnt[i];
    }
    //cout << cnt[1000000];
    cout << ans;
    return 0;
}


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

#include <stdio.h>
#include <stdint.h>

int32_t main(void)
{
    uint64_t n;
    if (scanf("%lu", &n) < 0) {
        return 1;
    }

    uint64_t total = 0;
    for (uint64_t i = 1; i <= n; ++i) {
        uint64_t yakusu = 1;
        for (uint64 j = 1; j < i; ++j) {
            if ((i % j) == 0) {
                ++yakusu;
            }
        }

        total += i * yakusu;
    }

    printf("%lu", total);
    fflush(stdout);

    return 0;
}


Compiler output:
a.cc: In function 'int32_t main()':
a.cc:14:14: error: 'uint64' was not declared in this scope; did you mean 'uint64_t'?
   14 |         for (uint64 j = 1; j < i; ++j) {
      |              ^~~~~~
      |              uint64_t
a.cc:14:28: error: 'j' was not declared in this scope
   14 |         for (uint64 j = 1; j < i; ++j) {
      |                            ^
Language: C++

using namespace std;

int countDivisors(int n)
{
    int cnt = 0;
    for (int i = 1; i <= sqrt(n); i++) {
        if (n % i == 0) {
            // If divisors are equal,
            // count only one
            if (n / i == i)
                cnt++;

            else // Otherwise count both
                cnt = cnt + 2;
        }
    }
    return cnt;
}
int main()
{


int solution=0,k,n;
cout<<"enter the upper limit (value of n)";
cin>>n;
for(k=1;k<n;k++)
{
  solution=solution+(k*countDivisors(k));
}
cout<<"ans is "<<solution;
}


Compiler output:
a.cc: In function 'int countDivisors(int)':
a.cc:6:26: error: 'sqrt' was not declared in this scope
    6 |     for (int i = 1; i <= sqrt(n); i++) {
      |                          ^~~~
a.cc: In function 'int main()':
a.cc:24:1: error: 'cout' was not declared in this scope
   24 | cout<<"enter the upper limit (value of n)";
      | ^~~~
a.cc:1:1: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | using namespace std;
a.cc:25:1: error: 'cin' was not declared in this scope
   25 | cin>>n;
      | ^~~
a.cc:25:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
Language: C++

#include <bits/stdc++.h>
#define IOS  ios_base::sync_with_stdio(false), cin.tie(0), cout.tie(0)
#define mp    make_pair
#define pb    push_back
#define F     first
#define pi 	  3.14159265358979323846
#define S     second
#define ll    long long
#define ld    long double
#define sz(s) (ll)s.size() 
#define vl    vector < ll >
#define pll   pair < ll, ll >
#define ml    map < ll, ll >
#define mod   1000000007
#define MAXN  50005 
#define rep(i,a,b)  for(ll i=a;i<b;i++)
#define inv(i,a,b)  for(ll i=a;i>=b;i--)
#define all(a)  (a).begin(),(a).end()
using namespace std;
calc(ll n){
	ll i,ans=0;
	for(i=2;i*i<=n;i++)if(n%i==0){
		if(i*i==n)ans++;else ans+=2;
	}
	return ans+2;
}
int main(){
	IOS;
	ll t,n,l;
	ll i,j,m,mn,d,x,y,ans=0,temp=0,k,c;
	string s,s1;
	cin>>n;
	ans=1;
	rep(i,2,n+1){
		ans+=i*calc(i);
	}
//	rep(i,1,n+1)ans+=i*a[i];
	cout<<ans;
}

Compiler output:
a.cc:20:1: error: ISO C++ forbids declaration of 'calc' with no type [-fpermissive]
   20 | calc(ll n){
      | ^~~~
Language: C++

#include<iostream>
using namespace std;

int f(int k){
    int　a = 0;
    if(k % 2 == 0){
        a = 4;
        for(int i = 3; i < k/2;i++){
            if(k%i==0) a++;
        }
    }else{
        a = 2;
        for(int i = 3; i < (k-1)/2;i++){
            if(k%i==0) a++;
        }
    }
    return a;
}

int main(){
    int N;
    std::cin >> N;
    std::cout << N << std::endl;
    int sum = 0;
    for(int i = 1;1 <= N ; i++){
        sum += i*f(i);
    }
    std::cout << sum << std::endl;
    return 0;
}



Compiler output:
a.cc:5:5: error: extended character 　 is not valid in an identifier
    5 |     int　a = 0;
      |     ^
a.cc: In function 'int f(int)':
a.cc:5:5: error: 'int\U00003000a' was not declared in this scope
    5 |     int　a = 0;
      |     ^~~~~~
a.cc:7:9: error: 'a' was not declared in this scope
    7 |         a = 4;
      |         ^
a.cc:12:9: error: 'a' was not declared in this scope
   12 |         a = 2;
      |         ^
a.cc:17:12: error: 'a' was not declared in this scope
   17 |     return a;
      |            ^