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

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

int main() {
    
    ll n,k,a[200000];
    cin>>n>>k;
    for(ll i=0;i<n;i++)
        cin>>a[i];
    sort(a,a+n);
    ll ub=mod*mod,lb=-(mod*mod);
    while(ub-lb>1){
        ll mid=(ub+lb)/2,cnt=0;
        for(ll i=0;i<n;i++){
            if(a[i]>0)
                cnt+=upper_bound(a,a+n,(long double)mid/a[i])-a;
            else if(a[i]<0)
                cnt+=n-(lower_bound(a,a+n,(long double)mid/a[i])-a);
            else if(mid>=0)
                    cnt+=n;
            if(a[i]*a[i]<=mid)
                cnt--;
        }
        (cnt>=2*k?ub:lb)=mid;
    }
    cout<<ub<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:11: error: 'mod' was not declared in this scope; did you mean 'modf'?
   13 |     ll ub=mod*mod,lb=-(mod*mod);
      |           ^~~
      |           modf
a.cc:14:14: error: 'lb' was not declared in this scope; did you mean 'ub'?
   14 |     while(ub-lb>1){
      |              ^~
      |              ub
a.cc:18:17: error: 'cnt' was not declared in this scope; did you mean 'int'?
   18 |                 cnt+=upper_bound(a,a+n,(long double)mid/a[i])-a;
      |                 ^~~
      |                 int
a.cc:20:17: error: 'cnt' was not declared in this scope; did you mean 'int'?
   20 |                 cnt+=n-(lower_bound(a,a+n,(long double)mid/a[i])-a);
      |                 ^~~
      |                 int
a.cc:22:21: error: 'cnt' was not declared in this scope; did you mean 'int'?
   22 |                     cnt+=n;
      |                     ^~~
      |                     int
a.cc:24:17: error: 'cnt' was not declared in this scope; did you mean 'int'?
   24 |                 cnt--;
      |                 ^~~
      |                 int
a.cc:26:10: error: 'cnt' was not declared in this scope; did you mean 'int'?
   26 |         (cnt>=2*k?ub:lb)=mid;
      |          ^~~
      |          int
Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
    int number, target;
    cin >> number >> target;
  	int plus=0;
  	int minus=0;
  	int zero=0;
    vector<int> pluses, minuses, zeros;
  	for(int i=0; i<number; i++) {
      	int tmp;
        cin >> tmp;
      	if(tmp==0){
          	zeros.push_back(tmp);
        }else if(tmp>0){
          	pluses.push_back(tmp);
        }else{
          	minuses.push_back(tmp);
        }
    };
    
  	int valMinus = pluses.size()*minuses.size();
  	int valZeno = zeros.size()*(pluses.size()+minuses.size());
  	int valPlus = pluses.size()*(pluses.size()-1) + minuses.size()*(minuses.size()-1);
  	
  	int ret;
  	if(target>valMinus && target<=(valMinus+valZero)){
      	ret=0;
    }else if(target>(valMinus+valZero)){
      	vector<long> tmps;
      	for(int i=0; i<pluses.size()-1; i++){
          for(int j=i+1; j<pluses.size(); j++){
            tmps.push_back(pluses[i]*pluses[j]);
          }
        }
       	for(int i=0; i<minuses.size()-1; i++){
          for(int j=i+1; j<minuses.size(); j++){
            tmps.push_back(minuses[i]*minuses[j]);
          }
        }
      	sort(tmp.begin(), tmp.end());
      	ret = tmp[target-valMinus-valZero];
    }else{
      	vector<long> tmps;
      	for(int i=0; i<pluses.size(); i++){
          for(int j=0; j<minses.size(); j++){
            tmps.push_back(pluses[i]*pluses[j]);
          }
        }
      	sort(tmp.begin(), tmp.end());
      	ret = tmp[target];      
    }
    cout << ret << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:30:49: error: 'valZero' was not declared in this scope; did you mean 'valZeno'?
   30 |         if(target>valMinus && target<=(valMinus+valZero)){
      |                                                 ^~~~~~~
      |                                                 valZeno
a.cc:44:14: error: 'tmp' was not declared in this scope; did you mean 'tmps'?
   44 |         sort(tmp.begin(), tmp.end());
      |              ^~~
      |              tmps
a.cc:49:26: error: 'minses' was not declared in this scope; did you mean 'minuses'?
   49 |           for(int j=0; j<minses.size(); j++){
      |                          ^~~~~~
      |                          minuses
a.cc:53:14: error: 'tmp' was not declared in this scope; did you mean 'tmps'?
   53 |         sort(tmp.begin(), tmp.end());
      |              ^~~
      |              tmps
Language: C++

/Users/USER-13/CLionProjects/AtCorder/cmake-build-debug/AtCorder
30 413
-170202098 -268409015 537203564 983211703 21608710 -443999067 -937727165 -97596546 -372334013 398994917 -972141167 798607104 -949068442 -959948616 37909651 0 886627544 -20098238 0 -948955241 0 -214720580 277222296 -18897162 834475626 0 -425610555 110117526 663621752 0
448283280358331064

Process finished with exit code 0


Compiler output:
a.cc:1:1: error: expected unqualified-id before '/' token
    1 | /Users/USER-13/CLionProjects/AtCorder/cmake-build-debug/AtCorder
      | ^
Language: C++

#include<iostream>
#include<vector>
using namespace std;
int main()
{
    int number, target;
    cin >> number >> target;
  	int plus=0;
  	int minus=0;
  	int zero=0;
    vector<int> pluses, minuses, zeros;
  	for(int i=0; i<number; i++) {
      	int tmp;
        cin >> tmp;
      	if(tmp==0){
          	zeros.push_back(tmp);
        }else if(tmp>0){
          	pluses.push_back(tmp);
        }else{
          	minuses.push_back(tmp);
        }
    };
    
  	int valMinus = pluses.size()*minuses.size();
  	int valZeno = zeros.size()*(pluses.size()+minuses.size());
  	int valPlus = pluses.size()*(pluses.size()-1) + minuses.size()*(minuses.size()-1);
  	
  	int ret;
  	if(target>valMinus && target<=(valMinus+valZero)){
      	ret=0;
    }else if(target>(valMinus+valZero)){
      	vector<long> tmps;
      	for(int i=o; i<pluses.size()-1; i++){
          for(int j=i+1; j<pluses.size(); j++){
            tmps.push_back(pluses[i]*pluses[j]);
          }
        }
       	for(int i=o; i<minuses.size()-1; i++){
          for(int j=i+1; j<minuses.size(); j++){
            tmps.push_back(minuses[i]*minuses[j]);
          }
        }
      	sort(tmp.begin(), tmp.end());
      	ret = tmp[target-valMinus-valZero];
    }else{
      	vector<long> tmps;
      	for(int i=o; i<pluses.size(); i++){
          for(int j=0; j<minses.size(); j++){
            tmps.push_back(pluses[i]*pluses[j]);
          }
        }
      	sort(tmp.begin(), tmp.end());
      	ret = tmp[target];      
    }
    cout << ret << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:29:49: error: 'valZero' was not declared in this scope; did you mean 'valZeno'?
   29 |         if(target>valMinus && target<=(valMinus+valZero)){
      |                                                 ^~~~~~~
      |                                                 valZeno
a.cc:33:19: error: 'o' was not declared in this scope
   33 |         for(int i=o; i<pluses.size()-1; i++){
      |                   ^
a.cc:38:19: error: 'o' was not declared in this scope
   38 |         for(int i=o; i<minuses.size()-1; i++){
      |                   ^
a.cc:43:14: error: 'tmp' was not declared in this scope; did you mean 'tmps'?
   43 |         sort(tmp.begin(), tmp.end());
      |              ^~~
      |              tmps
a.cc:43:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   43 |         sort(tmp.begin(), tmp.end());
      |         ^~~~
      |         short
a.cc:47:19: error: 'o' was not declared in this scope
   47 |         for(int i=o; i<pluses.size(); i++){
      |                   ^
a.cc:48:26: error: 'minses' was not declared in this scope; did you mean 'minuses'?
   48 |           for(int j=0; j<minses.size(); j++){
      |                          ^~~~~~
      |                          minuses
a.cc:52:14: error: 'tmp' was not declared in this scope; did you mean 'tmps'?
   52 |         sort(tmp.begin(), tmp.end());
      |              ^~~
      |              tmps
a.cc:52:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   52 |         sort(tmp.begin(), tmp.end());
      |         ^~~~
      |         short
Language: C++

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

int main(){
  int n, k, h;
  h = 0;
  cin >> n >> k;
  vector<int> a.(n), b.(n * (n - 1) / 2);
  for(int i = 0; i < n; i++){
    cin >> a[i];
  }
  for(int i = 0; i < n; i++){
    for(int j = 0; j < n; j++){
      b[h] = a[i] * a [j];
      h++;
    }
  }
  sort(b.begin(),b.end());
  cout << b[k] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:16: error: expected initializer before '.' token
    8 |   vector<int> a.(n), b.(n * (n - 1) / 2);
      |                ^
a.cc:10:12: error: 'a' was not declared in this scope
   10 |     cin >> a[i];
      |            ^
a.cc:14:7: error: 'b' was not declared in this scope
   14 |       b[h] = a[i] * a [j];
      |       ^
a.cc:14:14: error: 'a' was not declared in this scope
   14 |       b[h] = a[i] * a [j];
      |              ^
a.cc:18:8: error: 'b' was not declared in this scope
   18 |   sort(b.begin(),b.end());
      |        ^
Language: C++

#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main(){
  long long n,k,i,c,h,j,z;
  cin >> n >> k;
  vector<long long> a;
  c = (n * (n - 1)) / 2;
  vector<pair <long long,long long> > pp;
  vector<pair <long long,long long> > ppp;
  vector<pair <long long,long long> > mm;
  vector<pair <long long,long long> > mmm;
  for(i = 0; i < n; i++){
    cin >> j;
    a.push_back(j);
    }
  long long ip = 0;
  long long im = 0;
  for(i = 0; i < n; i++){
    for(h = i; h < n; h++){
      if(a[i] < 0 && a[h] > 0){
        mm.push_back(make_pair(a[i] - a[h],im));
        mmm.push_back(make_pair(a[i],a[h]));
        im += 1;
      }else if(a[i] > 0 && a[h] < h){
        mm.push_back(make_pair(a[h] - a[i],im));
        mmm.push_back(make_pair(a[i],a[h]));
        im += 1;
      }else{
        pp.push_back(make_pair(a[i] + a[h],pm));
        ppp.push_back(make_pair(a[i],a[h]));
        ip += 1;
      }
    }
  }
    sort(pp.begin(),pp.end());
    sort(mm.begin(),mm.end());
    if(im >= k){
      z = mm[k].second;
      cout << mmm[z].first*mmm[z].second
    }else{
      z = mm[k].second - im;
      cout << mmm[z - im].first*mmm[z - im].second
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:44: error: 'pm' was not declared in this scope; did you mean 'im'?
   35 |         pp.push_back(make_pair(a[i] + a[h],pm));
      |                                            ^~
      |                                            im
a.cc:45:41: error: expected ';' before '}' token
   45 |       cout << mmm[z].first*mmm[z].second
      |                                         ^
      |                                         ;
   46 |     }else{
      |     ~                                    
a.cc:48:51: error: expected ';' before '}' token
   48 |       cout << mmm[z - im].first*mmm[z - im].second
      |                                                   ^
      |                                                   ;
   49 |   }
      |   ~
Language: C++

#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main(){
    
    int N, K, c;
    cin >> N;
    cin >> K;
    vector<int> A(N);
    c = N*(N-1)/2;
    vector<int> p(c);
    
    for(int i = 0; i < N; i++){
        cin >> A[i];
    }
    
    for(int i = 0; i < N; i++){
        for(int j = i+1; j < N; j++){
            p.push_back(A[i]*A[j]);
        }
    }

    sort(p.begin(), p.end());
        
    printf("%d", p[K]);
    return 0;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:5: error: 'sort' was not declared in this scope; did you mean 'short'?
   26 |     sort(p.begin(), p.end());
      |     ^~~~
      |     short
Language: C++

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

int main(){
    long long int N, K;
    cin >> N >> K;

    vector<long long int> A(N);
    for(long long int i = 0; i < N; ++i) cin >> A[i];

    long long int cntm = 0;
    long long int cnt0 = 0;
    long long int cntp = 0;
    for(const auto& a : A){
        if(a < 0){
            ++cntm;
        }else if(a == 0){
            ++cnt0;
        }else{
            ++cntp;
        }
    }

    long long int num_m = 0;
    long long int num_0 = 0;
    long long int num_p = 0;

    if(cntm != 0 && cntp != 0){
        num_m += cntm*cntp;
    }

    if(cnt0 != 0){
        num_0 += cnt0*(cntm+cntp);
        if(cnt0 >= 2){
            num_0 += cnt0*(cnt0-1)/2;
        }
    }

    if(cntm >= 2){
        num_p += cntm*(cntm-1)/2;
    }

    if(cntp >= 2){
        num_p += cntp*(cntp-1)/2;
    }

    if(K <= num_m){
        sort(begin(A), end(A));
        multiset<long long int> s;
        for(long long int i = 0; i < cntm; ++i){
            for(long long int j = cntm+cnt0; j < N; ++j){
                s.emplace(A[i]*A[j]);
            }
        }
        
        auto ans = begin(s);
        for(int i = 0; i < K; ++i){
            ++ans;
        }

        cout << *ans << endl;
    }else if(K > num_m && K <= num_m+num_0){
        cout << "0" << endl;
    }else{
        sort(begin(A), end(A));
        multiset<long long int> s;
        for(long long int i = 0; i < cntm; ++i){
            for(long long int j = i+1; j < cntm; ++j){
                s.emplace(A[i]*A[j]);
            }
        }

        for(long long int i = cntm+cnt0; i < N; ++i){
            for(long long int j = i+1; j < N; ++j){
                s.emplace(A[i]*A[j]);
            }
        }

        auto ans = begin(s);
        for(int i = 0; i < K-num_m-num_0-1; ++i){
            ++ans;
        }

        cout << *ans << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   50 |         sort(begin(A), end(A));
      |         ^~~~
      |         short
a.cc:67:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   67 |         sort(begin(A), end(A));
      |         ^~~~
      |         short
Language: C++

for (int i = 0; i < min((int)minus.size(), (int)sqrt(2 * K)); i++) {
      for (int j = i + 1; j < min((int)minus.size(), (int)sqrt(2 * K)); j++) {
        B.push_back((ll)minus[i] * minus[j]);
      }
    }
    for (int i = 0; i < min((int)plus.size(), (int)sqrt(2 * K)); i++) {
      for (int j = i + 1; j < min((int)plus.size(), (int)sqrt(2 * K)); j++) {
        B.push_back((ll)plus[i] * plus[j]);
      }
    }
    s

Compiler output:
a.cc:1:1: error: expected unqualified-id before 'for'
    1 | for (int i = 0; i < min((int)minus.size(), (int)sqrt(2 * K)); i++) {
      | ^~~
a.cc:1:17: error: 'i' does not name a type
    1 | for (int i = 0; i < min((int)minus.size(), (int)sqrt(2 * K)); i++) {
      |                 ^
a.cc:1:63: error: 'i' does not name a type
    1 | for (int i = 0; i < min((int)minus.size(), (int)sqrt(2 * K)); i++) {
      |                                                               ^
a.cc:6:5: error: expected unqualified-id before 'for'
    6 |     for (int i = 0; i < min((int)plus.size(), (int)sqrt(2 * K)); i++) {
      |     ^~~
a.cc:6:21: error: 'i' does not name a type
    6 |     for (int i = 0; i < min((int)plus.size(), (int)sqrt(2 * K)); i++) {
      |                     ^
a.cc:6:66: error: 'i' does not name a type
    6 |     for (int i = 0; i < min((int)plus.size(), (int)sqrt(2 * K)); i++) {
      |                                                                  ^
a.cc:11:5: error: 's' does not name a type
   11 |     s
      |     ^
Language: C

#include<stdio.h>
#include <string.h>
#include <stdlib.h>
#define MAX 999999
void BubbleSort(int a[], int array_size)
{
    int i, j, temp;
    for (i = 0; i < (array_size - 1); ++i)
    {
        for (j = 0; j < array_size - 1 - i; ++j )
        {
            if (a[j] > a[j+1])
            {
                temp = a[j+1];
                a[j+1] = a[j];
                a[j] = temp;
            }
        }
    }
}

int main()
{
	int n, k;
	scanf("%d %d",&n, &k);
	fflush(stdin);
	int i=0;
	int arr[n];
	char string[MAX];
	gets(string);
	char *str = string;// = "345,3345,35,75,52,386";
	
	char *end = str;
	while(*end) {
		int n = strtol(str, &end, 10);
		arr[i] = n;
		while (*end == ',') {
			end++;
		}
		i++;
		str = end;
	}
//	for(i=0; i<n;i++)
//	{
//		scanf("%d", arr[i]);
//	}
	
//	for(i=0;i<n;i++)
//		printf("%d ", arr[i]);
//	printf("\n");
	int j;
	
	int answer[99999];
	int dd = 0;
	for(i=0; i<n;i++){
		
		for(j=i+1;j<n;j++){
//			printf("arr %d", arr[i] * arr[j]);
			answer[dd] = arr[i] * arr[j];
			dd++;
		}
		
	}
	printf("\n");	
	for(i=0;i<dd;i++)
		printf("answer %d", answer[i]);
	printf("\n");	
	BubbleSort(answer, dd)
	printf("%d", answer[k-1]);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:30:9: error: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
   30 |         gets(string);
      |         ^~~~
      |         fgets
main.c:68:31: error: expected ';' before 'printf'
   68 |         BubbleSort(answer, dd)
      |                               ^
      |                               ;
   69 |         printf("%d", answer[k-1]);
      |         ~~~~~~
Language: C++

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

int main() {
    long long int N, K;

    cin >> N >> K;

    vector<long int> A(N);

    long long int num = N*(N-1)/2;
    vector<long int> P(num);

    for (long long int i = 0; i < N; ++i) {
        cin >> A.at(i);
    } 

    for (int i = 0; i < A.size(); i++) {
        for (int j = 0; j < A.size(); j++) {
            P.at(i * A.size() + j) = A.at(i) * A.(j);
        }
    }

    std::sort(P.begin(), P.end());
    vec.erase(std::unique(P.begin(), P.end()), P.end());
    
    
    cout << vec.at(K) << endl;
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:20:50: error: expected unqualified-id before '(' token
   20 |             P.at(i * A.size() + j) = A.at(i) * A.(j);
      |                                                  ^
a.cc:25:5: error: 'vec' was not declared in this scope
   25 |     vec.erase(std::unique(P.begin(), P.end()), P.end());
      |     ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define MOD 1000000007

int main(){
    int n, k, a, x = 0, y = 0, z = 0;
    cin >> n >> k;
    long long ps[200000], ng[200000];
    for(int i=0; i<n; i++){
        cin >> a;
        if(a == 0){
            z++;
        }else if(a > 0){
            ps[x] = a;
            x++;
        }else{
            ng[y] = a;
            y++;
        }
    }
    sort(ps, ps+x);
    sort(ng, ng+y);
    if(k <= x*y){
        long long res[(long long)x*y];
        for(long long i=0; i<x; i++){
            for(long long j=0; j<y; j++){
                res[i+j*x] = ps[i]*ng[j];
            }
        }
        sort(res, res+x*y);
        cout << res[k];
    }else if(k <= x*y + z*n){
        cout << 0;
    }else{
        long long res[x*x+y*y];
        long long res[(long long)x*y];
        int count = 0;
        for(long long i=0; i<x; i++){
            for(long long j=i+1; j<x; j++){
                res[count] = ps[i]*ps[j];
                count++;
            }
        }
        for(long long i=0; i<y; i++){
            for(long long j=i+1; j<y; j++){
                res[count] = ng[i]*ng[j];
                count++;
            }
        }
        sort(res, res+x*(x-1)/2+y*(y-1)/2);
        cout << res[k-x*y-z*n];
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:19: error: conflicting declaration 'long long int res [(((long long int)x) * ((long long int)y))]'
   36 |         long long res[(long long)x*y];
      |                   ^~~
a.cc:35:19: note: previous declaration as 'long long int res [((x * x) + (y * y))]'
   35 |         long long res[x*x+y*y];
      |                   ^~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main(){
  int64_t N,K;
  cin>>N>>K;
  vector<int64_t> A(N);
  for(int i=0;i<N;++i){
    cin>>A[i];
  }
  sort(A.begin(),A.end());
 
  int64_t l=-pow(10,18);
  int64_t r=pow(10,18);
 
  while(r-l>1){
    int64_t mid=(l+r)/2;
    int64_t res=0;
 
    //mid=0の場合
    if(mid==0){
      for(int i=0;i<N;++i){
        if(A[i]>0) res += A.end()-lower_bound(A.begin()+i+1,A.end(),0);
        else if(A[i]<0) res += upper_bound(A.begin()+i+1,A.end(),-1)-(A.begin()+i+1);
        else res += N-i-1;
      }
    }
 
    else if(mid>0){
      for(int i=0;i<N;++i){
        if(A[i]>0) res +=  A.end()-lower_bound(A.begin()+i+1,A.end(),(mid+A[i]-1)/A[i]);
        else if(A[i]<0) res += upper_bound(A.begin()+i+1,A.end(),mid/A[i])-(A.begin()+i+1);
    }
 
    else if(mid<0){
      for(int i=0;i<N;++i){
        if(A[i]>0) res += A.end()-lower_bound(A.begin()+i+1,A.end(),mid/A[i]);
        else if(A[i]<0)  res += upper_bound(A.begin()+i+1,A.end(),mid/A[i])-(A.begin()+i+1);
        else res += N-i-1;
      }
    }
 
 
    if(res>=K) l=mid;
    else r=mid;
 
    if(r-l==1) cout<<l<<endl;
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:35:5: error: expected '}' before 'else'
   35 |     else if(mid<0){
      |     ^~~~
a.cc:29:19: note: to match this '{'
   29 |     else if(mid>0){
      |                   ^
Language: C++

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

void a(){
    ll a,b,c;
    cin >> a >>b >>c;
    cout << (a==b&&b==c?"No":
             a==b?"Yes":
             a==c?"Yes":
             b==c?"Yes":"No");
}
void b(){
    ll n; cin >> n;
    auto a = vector<ll>(n,0);
    bool f=true;
    rep(i,n) {
        cin >> a[i];
        if(a[i]%2==0){
            if(a[i]%5==0||a[i]%3==0) continue;
        }else continue;
        f = false;
        break;
    }
    cout << (f?"APPROVED":"DENIED");
}

void c(){
    ll n; cin >> n;
    map<string,ll> s;
    rep(i,n) {
        string t; cin >> t;
        s[t]++;
    }
    auto ans = vector<string>();
    ll _max = 0;
    for(auto i: s) _max = max(_max,i.second);
    for(auto i: s){
        if(i.second == _max) ans.push_back(i.first);
    }
    copy(ans.begin(),ans.end(),ostream_iterator<string>(cout,"\n"));
}

void d(){
    ll n,k;
    cin >> n >> k;
    auto a_p = vector<ll>();
    auto a_m = vector<ll>();
    ll zero =0;
    
    rep(i,n){
        ll a; cin >> a;
      	if(a>0) {
            a_p.push_back(a);
        }else if(a<0){
            a_m.push_back(abs(a));
        }
        else zero++;
    }
    
    map<ll,int> check;
    if(k<=a_p.size()+a_m.size()){ //-
        for(auto &i:a_m)
            for(auto &j:a_p) {
              	ll t = i*j; 
				check[t]++;
            }
        ll c=check.back();
      
        for(auto &i:check){
            if(c < k && k <= c+i.second){
                cout << "-"<<i.first;
                break;
            }
            c += i.second;
        }
        return;
    }else if(k<= a_p.size()+a_m.size()+zero){//zero
        cout << 0;
        return;
    }else{
        ll c = a_p.size()+a_m.size()+zero;
        rep(i,a_p.size())
            for(ll j = i+1;j<a_p.size();j++){
                check[a_p[i]*a_p[j]]++;
            }
        rep(i,a_m.size())
            for(ll j = i+1;j<a_m.size();j++){
                check[a_m[i]*a_m[j]]++;
            }
            
        for(auto &i:check){
            if(c < k && k <= c+i.second){
                cout << i.first;
                break;
            }
            c += i.second;
        }
        return;
    }
    
}

int main(){
    d();
    return 0;
}

Compiler output:
a.cc: In function 'void d()':
a.cc:69:20: error: 'class std::map<long long int, int>' has no member named 'back'
   69 |         ll c=check.back();
      |                    ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main()
{
    long long int n,k;
    cin >> n >> k;
    long long int ar[n];
    for( int i = 0 ; i < n ; i++)
        cin >> ar[i];
        sort (ar,ar+n]);
    long long int size =  (n*(n-1))/2;
    long long int product;
    int index = 0;
    for( long long int i = 0 ; i < n ; i++)
    {
        for( long long int j = i+1 ; j < n ; j++){
                product = ar[i] * ar[j];
            if(index == k - 1){break;}
            index++;
        }
        if(index == k -1) break;
    }
    cout << product << "\n";

}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:22: error: expected ')' before ']' token
   10 |         sort (ar,ar+n]);
      |              ~       ^
      |                      )
Language: C++

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

int main(){
    long long int N, K;
    cin >> N >> K;

    vector<long long int> A(N);
    for(long long int i = 0; i < N; ++i) cin >> A[i];

    long long int cntm = 0;
    long long int cnt0 = 0;
    long long int cntp = 0;
    for(const auto& a : A){
        if(a < 0){
            ++cntm;
        }else if(a == 0){
            ++cnt0;
        }else{
            ++cntp;
        }
    }

    long long int num_m = 0;
    long long int num_0 = 0;
    long long int num_p = 0;

    if(cntm != 0 && cntp != 0){
        num_m += cntm*cntp;
    }

    if(cnt0 != 0){
        num_0 += cnt0*(cntm+cntp);
        if(cnt0 >= 2){
            num_0 += cnt0*(cnt0-1)/2;
        }
    }

    if(cntm >= 2){
        num_p += cntm*(cntm-1)/2;
    }

    if(cntp >= 2){
        num_p += cntp*(cntp-1)/2;
    }

    if(K <= num_m){
        //sort(begin(A), end(A), [](const auto& a, const auto& b) { return abs(a) < abs(b);});
        sort(begin(A), end(A));
        multiset<long long int> s;
        for(long long int i = 0; i < cntm; ++i){
            for(long long int j = cntm+cnt0; j < N; ++j){
                s.emplace(A[i]*A[j]);
            }
        }
        
        auto ans = begin(s);
        for(int i = 0; i < K; ++i){
            ++ans;
        }

        cout << *ans << endl;
    }else if(K > num_m && K <= num_m+num_0){
        cout << "0" << endl;
    }else{
        cout << cntm << " " << cnt0 << " " << cntp << endl;

        sort(begin(A), end(A));
        multiset<long long int> s;
        for(long long int i = 0; i < cntm; ++i){
            for(long long int j = i+1; j < cntm; ++j){
                s.emplace(A[i]*A[j]);
            }
        }

        for(long long int i = cntm+cnt0; i < N; ++i){
            for(long long int j = i+1; j < N; ++j){
                s.emplace(A[i]*A[j]);
            }
        }

        auto ans = begin(s);
        for(int i = 0; i < K-num_m-num_0-1; ++i){
            ++ans;
        }

        cout << *ans << endl;
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:51:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   51 |         sort(begin(A), end(A));
      |         ^~~~
      |         short
a.cc:70:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   70 |         sort(begin(A), end(A));
      |         ^~~~
      |         short
Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<ll> vll;
typedef vector<vll> vvll;
typedef vector<bool> vb;
typedef vector<string> vst;
typedef pair<ll,ll> pll;
typedef vector<pll> vpll;


const ll mod=1e9+7;
const ll inf=1e16; 

#define rep(i,m,n) for(ll i=m;i<n;i++)
#define repr(i,m,n) for(ll i=m;i>=n;i--)

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

 ll m,k;
  cin >> m >> k;
  vll neg,zero,pos;
  rep(i,0,m){
   ll a;
    cin >> a;
    if(a<0) neg.push_back(a);
    else if(a>0) pos.push_back(a);
  }
  sort(neg.begin(),neg.end());
  sort(pos.begin(),pos.end());
  
  ll n=neg.size();
  ll p=pos.size();
  ll z=m-n-p;
  
  if(z!=0&&n*p<k&&k<=n*p+z*(n+p)+z*(z-1)/2) {
    cout << 0 << endl;
    return 0;
  }
  else if(k<=n*p/2) {
    vll ans;
    ll cnt=0;
    rep(i,0,min(k,n)){
     rep(j,0,min(k,p)){ 
       ans.push_back(neg[i]*pos[p-j-1]);
     }
    }
    sort(ans.begin(),ans.end());
    cout << ans[k-1] << endl;
    return 0;
  }
  else if(k<=n*p) {
    vll ans;
    ll cnt=0;
    rep(i,0,min(k,n)){
     rep(j,0,min(k,p)){ 
       ans.push_back(neg[n-i-1]*pos[j]);
     }
    }
    k-=(n*p-ans.size())
    
    sort(ans.begin(),ans.end());
    cout << ans[k-1] << endl;
    return 0;
  }
  else {
    k-=(n*p+z*(n+p)+z*(z-1)/2);
   vll ans;
    rep(i,0,min(k,n)){
      rep(j,i+1,min(k,n)) ans.push_back(neg[n-i-1]*neg[n-j-1]);
    }
    rep(i,0,min(k,p)){
      rep(j,i+1,min(k,p)) ans.push_back(pos[i]*pos[j]);
    }           
    sort(ans.begin(),ans.end());
    cout << ans[k-1] << endl;
    return 0;
  }
  
   
 
}


Compiler output:
a.cc: In function 'int main()':
a.cc:64:24: error: expected ';' before 'sort'
   64 |     k-=(n*p-ans.size())
      |                        ^
      |                        ;
   65 | 
   66 |     sort(ans.begin(),ans.end());
      |     ~~~~
Language: C++

#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

int main(){
  long long n,k,i,c,h,j,z;
  cin >> n >> k;
  vector<long long> a;
  c = (n * (n - 1)) / 2;
  vector<pair <long long,long long> > pp;
  vector<pair <long long,long long> > ppp;
  vector<pair <long long,long long> > mm;
  vector<pair <long long,long long> > mmm;
  for(i = 0; i < n; i++){
    cin >> j;
    a.push_back(j);
    }
  long long ip = 0;
  long long im = 0;
  for(i = 0; i < n; i++){
    for(h = i; h < n; h++){
      if(a[i] < 0 && a[h] > 0){
        mm.push_back(make_pair(a[i] - a[h],im);
        mmm.push_back(make_pair(a[i],a[h]));
        im += 1;
      }else if(a[i] > 0 && a[h] < h){
        mm.push_back(make_pair(a[h] - a[i],im);
        mmm.push_back(make_pair(a[i],a[h]));
        im += 1;
      }else{
        pp.push_back(make_pair(a[i] + a[h],pm);
        ppp.push_back(make_pair(a[i],a[h]));
        ip += 1;
      }
    }
  }
    sort(pp.begin(),pp.end());
    sort(mm.begin(),mm.end());
    if(im >= k){
      z = mm[k].second;
      cout << mmm[z].first*mmm[z].second
    }else{
      z = mm[k].second - im;
      cout << mmm[z - im].first*mmm[z - im].second
  }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:27:47: error: expected ')' before ';' token
   27 |         mm.push_back(make_pair(a[i] - a[h],im);
      |                     ~                         ^
      |                                               )
a.cc:31:47: error: expected ')' before ';' token
   31 |         mm.push_back(make_pair(a[h] - a[i],im);
      |                     ~                         ^
      |                                               )
a.cc:35:44: error: 'pm' was not declared in this scope; did you mean 'im'?
   35 |         pp.push_back(make_pair(a[i] + a[h],pm);
      |                                            ^~
      |                                            im
a.cc:45:41: error: expected ';' before '}' token
   45 |       cout << mmm[z].first*mmm[z].second
      |                                         ^
      |                                         ;
   46 |     }else{
      |     ~                                    
a.cc:48:51: error: expected ';' before '}' token
   48 |       cout << mmm[z - im].first*mmm[z - im].second
      |                                                   ^
      |                                                   ;
   49 |   }
      |   ~
Language: C++

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

int main() {
  ll n, k;
  cin >> n >> k;
  vector<ll> a(n);
  for (auto& e : a) cin >> e;
  sort(a.begin(), a.end());

  // WIP
  if (k <= ap.size() * an.size()) {
  } else {
  }

  ll l = -1e18 - 1, r = 1e18 + 1, m;
  while (l + 1 < r) {
    m = l + (r - l) / 2;
    ll x = 0;
    for (ll i = 0; i < n; i++) {
      ll j = lower_bound(a.begin() + i, a.end(), m / a[i] + 1) - a.begin();
      x += (j - i) * (j - i - 1) / 2;
    }
    if (x > k) {
      l = m;
    } else {
      r = m - 1;
    }
  }
  cout << r << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:12: error: 'ap' was not declared in this scope; did you mean 'a'?
   13 |   if (k <= ap.size() * an.size()) {
      |            ^~
      |            a
a.cc:13:24: error: 'an' was not declared in this scope; did you mean 'a'?
   13 |   if (k <= ap.size() * an.size()) {
      |                        ^~
      |                        a
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<long long> vll;
typedef vector<pair<int,int>> vp;
typedef pair<int,int> pii;
#define INF (int)(1e9)
#define MAXX 1.1529215e+18
#define inf 999999
#define EPS (1e-7)
#define rep(i,n) for(int i=0; i<(int)(n);i++)
#define REP(i,n) for(int i=1;i<=(int)(n);i++)
#define FOR(i,k,n) for(int i=(k);i<(int)(n);i++)
#define ALL(a)  a.begin(),a.end()
#define RALL(a) a.begin(),a.end(),greater<int>()
#define ROT(a) a.begin(),a.begin()+1,a.end()
#define RROT(a) a.begin(),a.end()-1,a.end()
#define PB push_back
#define MP make_pair
#define PI acos(-1.0)
#define sz(a) a.size()
const ll MOD = 1e9+7;
const int MAX = 10000000;
template<typename T1, typename T2> inline bool chmin(T1 &a, T2 b) { if (a > b) { a = b; return 1; } return 0; }
template<typename T1, typename T2> inline bool chmax(T1 &a, T2 b) { if (a < b) { a = b; return 1; } return 0; }
template<typename T> T gcd(T a, T b) { if (b == 0) return a; return gcd(b, a % b); }
//cout << 'H' << endl;
//next_permutation(ALL(p));

int main(){
	int plus=0,minus=0,z=0;
	int n,k;
	cin >> n >> k;
	int a[n];
	vector<int> Plus;
	vector<int> Minus;
	rep(i,n){
		int x;
		cin >> x;
		if(x>0){
			plus++;
			Plus.push_back(x);
		}else if(x<0){
			minus++;
			Minus.push_back(x);
		}else z++;
	}
	
	z = z*(z-1)/2
	if(k<minus*plus){
		vector<int> res;
		ll x=0;
		rep(i,plus) rep(j,minus){
			res.push_back(Plus[i]*Minus[j]);
		}
		sort(ALL(res));
		cout << res[k-1] << endl;
	}else if(k>(minus*plus+z)){
		vector<int> res(plus*(plus-1)/2);
		ll x=0;
		rep(i,plus-1){
			for(int j=i+1; j<plus; j++){
				res[x]=(Plus[i] * Plus[j]);
				x++;
			}
		}
		sort(ALL(res));
      int num = k-(minus*plus+z)-1;
		cout << res[num] << endl;
	}else{
		cout << "0" << endl;
	}
	
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:49:22: error: expected ';' before 'if'
   49 |         z = z*(z-1)/2
      |                      ^
      |                      ;
   50 |         if(k<minus*plus){
      |         ~~            
a.cc:58:10: error: 'else' without a previous 'if'
   58 |         }else if(k>(minus*plus+z)){
      |          ^~~~
Language: C

#include<stdio.h>

int ascSort(const void* v1, const void* v2) {
    const float _v1 = *((const float*)v1);
    const float _v2 = *((const float*)v2);
 
    if ( _v1 > _v2 ) {
        return 1;
    } else if ( _v1 < _v2 ) {
        return -1;
    } else {
        return 0;
    }
}




int main()
{
    int N;
  	float K;
	scanf("%d", &N);
  scanf("%f", &K);
  
  float a[N];
  int i=0;
  for(i=0;i<N;i++){
    scanf("%f", &a[i]);
  }
  
  float b[N*(N-1)/2];
  int j = 0;
  int k = 0;
  for(i=0;i<N;i++){
	for(j=i+1;j<N;j++){
	b[k] = a[i] * a[j];
     k++;
    }
  }
  
  int ch = int(N*(N-1)/2);
    qsort(b, ch, sizeof(a[0]), ascSort);
  
  
	int t = int(K-1);
    printf("%.f",b[t]);

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:42:12: error: expected expression before 'int'
   42 |   int ch = int(N*(N-1)/2);
      |            ^~~
main.c:43:5: error: implicit declaration of function 'qsort'; did you mean 'ascSort'? [-Wimplicit-function-declaration]
   43 |     qsort(b, ch, sizeof(a[0]), ascSort);
      |     ^~~~~
      |     ascSort
main.c:46:17: error: expected expression before 'int'
   46 |         int t = int(K-1);
      |                 ^~~
Language: C++

#include <bits/stdc++.h>
#include <iostream>
#include <boost/multiprecision/cpp_int.hpp>
#include <vector>
#define fr(i,b,e) for(int i=(b); i<(e); ++i)
#define all(x) (x).begin(),(x).end()

using namespace boost::multiprecision;
using namespace std;
typedef long int li;
typedef long long ll;

int chk(vector<int> a){
    int n=a.size();
    fr(i,0,n){
        cout << a.at(i);
    }
    cout << endl;
}

int gcd(int a,int b){ //a>b
    int tmp=a%b;
    a=b;
    b=tmp;
    if(b!=0){
        return gcd(a,b);
    }else{
        return a;
    }
}

ll power(ll a,ll n){
    if(n==1){
        return a;
    }
    else if(n&1==1){
        --n;
        return power(a,n)*a;
    }else{
        n=n>>1;
        return power(a,n)*power(a,n);
    }
}

int main(void){
    cpp_int N;
  	cpp_int M;
    cin >> N;
    int a;
    int p=0;
    for(int i=0; N!=0; ++i){
        M=N/10;
        a=N-M*10;
        if(a < 6){
            p+= a;
        }else{
            p+=(11-a);
        }
        N=M;
    }
    cout << p << endl;
}



Compiler output:
a.cc:3:10: fatal error: boost/multiprecision/cpp_int.hpp: No such file or directory
    3 | #include <boost/multiprecision/cpp_int.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include<cstdio>
#include<algorithm>
using namespace std;
const int maxn=200005;
long long b[maxn],a[maxn];

int main(){
int n,k,i,j,m;
scanf("%d%d",&n,&k);
for(i=0;i<n;i++){
    scanf("%lld",&a[i]);
}
for(i=0;i<n-1;i++)
    for(j=1;j>i&&j<n;j++){
        b[m]=a[i]*a[j];
        m++;
    }
  m=n*(n-1)/2
sort(b,b+m);
printf("%lld\n",b[k-1]);
return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:14: error: expected ';' before 'sort'
   18 |   m=n*(n-1)/2
      |              ^
      |              ;
   19 | sort(b,b+m);
      | ~~~~
Language: C++

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

int main(void) {
	int n,i,k,j;
	std::cin >> n >> k;
	unsigned long int s = 0;

	std::vector<long int>num(n),seki(n * (n-1)/2);
	for (i = 0; i < n; i++) {
		std::cin >> num.at(i);
	}
	
	
	for (i = 0; i < n; i++) {
		for (j = i + 1; j < n; j++) {
			seki.at(s) = num.at(i) * num.at(j);
			s++;
			}
		}
		
	std::qsort(seki.begin(), seki.end());
	std::cout << seki.at(k-1) << std::endl;



	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:24:30: error: cannot convert 'std::vector<long int>::iterator' to 'void*'
   24 |         std::qsort(seki.begin(), seki.end());
      |                    ~~~~~~~~~~^~
      |                              |
      |                              std::vector<long int>::iterator
In file included from /usr/include/c++/14/cstdlib:79,
                 from /usr/include/c++/14/ext/string_conversions.h:43,
                 from /usr/include/c++/14/bits/basic_string.h:4154,
                 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/stdlib.h:970:26: note:   initializing argument 1 of 'void qsort(void*, size_t, size_t, __compar_fn_t)'
  970 | extern void qsort (void *__base, size_t __nmemb, size_t __size,
      |                    ~~~~~~^~~~~~
Language: C

#include<stdio.h>

int ascSort(const void* v1, const void* v2) {
    const float _v1 = *((const float*)v1);
    const float _v2 = *((const float*)v2);
 
    if ( _v1 > _v2 ) {
        return 1;
    } else if ( _v1 < _v2 ) {
        return -1;
    } else {
        return 0;
    }
}




int main()
{
    int N;
  	float K;
	scanf("%d", &N);
  scanf("%f", &K);
  
  float a[N];
  int i=0;
  for(i=0;i<N;i++){
    scanf("%f", &a[i]);
  }
  
  float b[N*(N-1)/2];
  int j = 0;
  int k = 0;
  for(i=0;i<N;i++){
	for(j=i+1;j<N;j++){
	b[k] = a[i] * a[j];
     k++;
    }
  }
    qsort(b, N*(N-1)/2, sizeof(a[0]), ascSort);
  
  

    printf("%.f",b[K-1]);

    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:41:5: error: implicit declaration of function 'qsort'; did you mean 'ascSort'? [-Wimplicit-function-declaration]
   41 |     qsort(b, N*(N-1)/2, sizeof(a[0]), ascSort);
      |     ^~~~~
      |     ascSort
main.c:45:19: error: array subscript is not an integer
   45 |     printf("%.f",b[K-1]);
      |                   ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define REP(i,n) for(int i=0; i<(n); i++)
#define REP2(i,x,n) for(int i=x; i<(n); i++)
#define ALL(n) begin(n),end(n)
struct cww{cww(){ios::sync_with_stdio(false);cin.tie(0);}}star;
const long long INF = numeric_limits<long long>::max();
int main()
{
    long long int n, k;
    cin >> n >> k;
    vector<long long int> a(n);
    #if 0
    long long int size = n * (n - 1) / 2;
    vector<long long int> multi_a(size);
    for (long long int i = 0; i < n; i++) cin >> a[i];
    long long int cnt = 0;

    for (long long int i = 0; i < n - 1; i++){
        for (long long int j = i + 1; j < n; j++){
            multi_a[cnt] = a[i] * a[j];
            cnt++;
        }
    }
    #endif
    sort(multi_a.begin(), multi_a.end());
    //cout << multi_a[k - 1] << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:10: error: 'multi_a' was not declared in this scope
   26 |     sort(multi_a.begin(), multi_a.end());
      |          ^~~~~~~
Language: C++

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

int main()
{
 map<long,long> MA; 
  int N,i,j;
  long K;
  cin >> N >> K;
  vector<long> A;
  long t;
  long sum;
  sum=0
  for(i=0;i<N;i++)
  {
    cin >>t;
    A.push_back(t);
  }
  
  
  for(i=0;i<N;i++)
  {
    for(j=i;j<N;j++)
    {
      MA[A[i]*A[j]]++;
    }
  }
  
  auto begin = MA.begin(), end = MA.end();
   for (auto iter = begin; iter != end; iter++) 
   {
      if(sum<K&&(sum+iter->second>=K))
      {
        cout << iter->first<<endl;
      }
      sum=iter->second+sum;
       
   }
  
}
   


Compiler output:
a.cc: In function 'int main()':
a.cc:13:8: error: expected ';' before 'for'
   13 |   sum=0
      |        ^
      |        ;
   14 |   for(i=0;i<N;i++)
      |   ~~~   
a.cc:14:18: error: expected ';' before ')' token
   14 |   for(i=0;i<N;i++)
      |                  ^
      |                  ;
Language: C++

#include <bits/stdc++.h>
#define rep(i, a, n) for (int i = (a); i < n; i++)
#define print(x) cout << x << endl;
using namespace std;
typedef long long ll;

int main()
{
    ll N, K;
    cin >> N >> K;
    vector<ll> A(N);

    rep(i, 0, N) {
        cin >> A[i];
    }

    priority_queue<ll> small;

    rep(i, 0, N) {
        rep(j, i+1, N) {
            ll v = A[i] * A[j];
            if (small.size() < K) {
                small.push(v);
                continue;
            }

            ll current_kth = small.top();

            if (v < current_kth) {
                small.pop();
                small.push(v);
                large.push(current_kth);
            }
        }
    }
    cout << small.top() << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:32:17: error: 'large' was not declared in this scope
   32 |                 large.push(current_kth);
      |                 ^~~~~
Language: C++

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

int main()
{
  
  int N,i,j;
  long K;
  cin >> N >> K;
  vector<long> A;
  long t;
  long sum;
  sum=0
  for(i=0;i<N;i++)
  {
    cin >>t;
    A.push_back(t);
  }
  
  map<long,long> m;
  for(i=0;i<N;i++)
  {
    for(j=i;j<N;j++)
    {
      m[A[i]*A[j]]++;
    }
  }
  
  auto begin = m.begin(), end = m.end();
   for (auto iter = begin; iter != end; iter++) 
   {
      if(sum<K&&(sum+iter->second>=K))
      {
        cout << iter->first<<endl;
      }
      sum=iter->second+sum;
       
   }
  
}
   


Compiler output:
a.cc: In function 'int main()':
a.cc:13:8: error: expected ';' before 'for'
   13 |   sum=0
      |        ^
      |        ;
   14 |   for(i=0;i<N;i++)
      |   ~~~   
a.cc:14:18: error: expected ';' before ')' token
   14 |   for(i=0;i<N;i++)
      |                  ^
      |                  ;
Language: C++

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

int main()
{
  
  int N,i,j;
  long K;
  cin >> N >> K;
  vector<long> A;
  long t;
  long sum;
  sum=0
  for(i=0;i<N;i++)
  {
    cin >>t;
    A.push_back(t);
  }
  
  map<long,long> Im;
  for(i=0;i<N;i++)
  {
    for(j=i;j<N;j++)
    {
      Im[A[i]*A[j]]++;
    }
  }
  
  auto begin = Im.begin(), end = Im.end();
   for (auto iter = begin; iter != end; iter++) 
   {
      if(sum<K&&(sum+iter->second>=K))
      {
        cout << iter->first<<endl;
      }
      sum=iter->second+sum;
       
   }
  
}
   


Compiler output:
a.cc: In function 'int main()':
a.cc:13:8: error: expected ';' before 'for'
   13 |   sum=0
      |        ^
      |        ;
   14 |   for(i=0;i<N;i++)
      |   ~~~   
a.cc:14:18: error: expected ';' before ')' token
   14 |   for(i=0;i<N;i++)
      |                  ^
      |                  ;
Language: Java

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

//AtCoder Beginner Contest 155
//D	Pairs
public class Main84 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = Integer.parseInt(sc.next());
		long K = Long.parseLong(sc.next());
		long[] A = new long[N];
		for (int i = 0; i < N; i++) {
			A[i] = Long.parseLong(sc.next());
		}
		sc.close();

		Map<Long, Integer> countMap = new HashMap<>();
		for (int i = 0; i < N; i++) {
			for (int j = i + 1; j < N; j++) {
				long v = A[i] * A[j];
				if (countMap.containsKey(v)) {
					countMap.put(v, countMap.get(v).intValue() + 1);
				} else {
					countMap.put(v, 1);
				}
			}
		}

		List<Long> l = new ArrayList<>(countMap.keySet());
		Collections.sort(l);

		for (Long v : l) {
			K -= countMap.get(v);
			if (K <= 0) {
				System.out.println(v);
				break;
			}
		}
	}
}


Compiler output:
Main.java:10: error: class Main84 is public, should be declared in a file named Main84.java
public class Main84 {
       ^
1 error
Language: C++

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

int main()
{
  map<long,long> Im;
  int N,i,j;
  long K;
  cin >> N >> K;
  vector<long> A;
  long t;
  long sum;
  sum=0
  for(i=0;i<N;i++)
  {
    cin >>t;
    A.push_back(t);
  }
  for(i=0;i<N;i++)
  {
    for(j=i;j<N;j++)
    {
      Im[A[i]*A[j]]++;
    }
  }
  
  auto begin = Im.begin(), end = Im.end();
   for (auto iter = begin; iter != end; iter++) 
   {
      if(sum<K&&(sum+iter->second>=K))
      {
        cout << iter->first<<endl;
      }
      sum=iter->second+sum;
       
   }
  
}
   

Compiler output:
a.cc: In function 'int main()':
a.cc:13:8: error: expected ';' before 'for'
   13 |   sum=0
      |        ^
      |        ;
   14 |   for(i=0;i<N;i++)
      |   ~~~   
a.cc:14:18: error: expected ';' before ')' token
   14 |   for(i=0;i<N;i++)
      |                  ^
      |                  ;
Language: C++

#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cmath>
#include<cstring>
#include<string>
#include<queue>
#include<stack>
#include<algorithm>
#include<vector>
#pragma GCC optimize(2)
#define ll long long 
using namespace std;
inline int read(){
    int x=0,f=1;
    char ch=getchar();
    while(ch<'0'||ch>'9'){
        if(ch=='-')
            f=-1;
        ch=getchar();
    }
    while(ch>='0'&&ch<='9'){
        x=(x<<1)+(x<<3)+(ch^48);
        ch=getchar();
    }
    return x*f;
}
ll a[200005],b[200005];
priority_queue <ll>q;
int main()
{
	cout<<-1;
	return 0;
	ll n;
	n=read();
	ll m;
	m=read();
	ll s=0;
	for(int i=1;i<=n;++i)a[i]=read(),if(a[i]<=0)s++;
	sort(a+1,a+n+1);
	memcpy(b,a,sizeof(a));
	//for(int i=2;i<=n;++i)q.push(a[1]*b[i]);
	if(s*(s-1)/2>=m)
	{
		
	
	for(int i=1;i<=s;++i)
	{
		for(int j=i+1;j<=s;++j)
		{
				if(q.size()<m)
				{
					q.push(a[i]*b[j]); 
				}
				else 
				{
					if(a[i]*b[j]<q.top())
					{
						q.push(a[i]*b[j]); 
						q.pop();
					}
				//	else break;
				}
		}
	}}
	else 
	{for(int i=1;i<=n;++i)
	{
		for(int j=i+1;j<=n;++j)
		{
				if(q.size()<m)
				{
					q.push(a[i]*b[j]); 
				}
				else 
				{
					if(a[i]*b[j]<q.top())
					{
						q.push(a[i]*b[j]); 
						q.pop();
					}
				//	else break;
				}
		}
	}
	}
	cout<<q.top();
}



Compiler output:
a.cc: In function 'int main()':
a.cc:39:42: error: expected primary-expression before 'if'
   39 |         for(int i=1;i<=n;++i)a[i]=read(),if(a[i]<=0)s++;
      |                                          ^~