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

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

int main() {
  long n;cin>>n;
  long m=1;
  while (pow(m,2)<=n) m++;
  cout << pow(m-1,2);


Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: expected '}' at end of input
    8 |   cout << pow(m-1,2);
      |                      ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C++

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


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

    long maxSq = (int)floor(sqrt(n));
    cout << maxSp << endl;
    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: 'maxSp' was not declared in this scope; did you mean 'maxSq'?
   12 |     cout << maxSp << endl;
      |             ^~~~~
      |             maxSq
Language: C++

//C
#include <cassert>
#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdalign>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>

//C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>

//Others
template<class T> inline bool chmin(T& a, T b) {
	if (a > b) {
		a = b;
		return true;
	}
	return false;
}
template<class T> inline bool chmax(T& a, T b) {
	if (a < b) {
		a = b;
		return true;
	}
	return false;
}
const int dx[8] = { -1,0,1,-1,1,-1,0,1 };
const int dy[8] = { 1,1,1,0,0,-1,-1,-1 };


//LOVE NyantakoGG	https://www.youtube.com/channel/UC6XdFs8T6Ei54O0FYl3PVVA


using namespace std;



int main() {
	int N;
	cin >> N;
	cout << pow((int)(floor)sqrt(N), 2) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:108:32: error: overloaded function with no contextual type information
  108 |         cout << pow((int)(floor)sqrt(N), 2) << endl;
      |                                ^
Language: C

#include<stdio.h>
int main (){
  int n,i,res,ans = 0;
  scanf("%d",&n);
  for (i = 0; i < 1000000000;i++){
    res = i * i;
    if (res > n ) {
      break ;
    } else {
      ans = res;
    }
  }
  print("%d\n",ans);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:13:3: error: implicit declaration of function 'print'; did you mean 'printf'? [-Wimplicit-function-declaration]
   13 |   print("%d\n",ans);
      |   ^~~~~
      |   printf
Language: C++

#include <iostream>
#include <cmath>
using namespace std;
int main(void)
{
	lli N; cin >> N;
	lli n = 1;
	while (pow(n + 1, 2) <= N)n++;
	cout << pow(n,2) << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'lli' was not declared in this scope
    6 |         lli N; cin >> N;
      |         ^~~
a.cc:6:23: error: 'N' was not declared in this scope
    6 |         lli N; cin >> N;
      |                       ^
a.cc:7:12: error: expected ';' before 'n'
    7 |         lli n = 1;
      |            ^~
      |            ;
a.cc:8:20: error: 'n' was not declared in this scope; did you mean 'yn'?
    8 |         while (pow(n + 1, 2) <= N)n++;
      |                    ^
      |                    yn
a.cc:9:21: error: 'n' was not declared in this scope; did you mean 'yn'?
    9 |         cout << pow(n,2) << endl;
      |                     ^
      |                     yn
Language: C++

#include <iostream>
using namespace std;
int main(){
  int n;cin>>n;
  cout << sqrt(n)*sqrt(n) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:11: error: 'sqrt' was not declared in this scope
    5 |   cout << sqrt(n)*sqrt(n) << endl;
      |           ^~~~
Language: C++

//#include <bits/stdc++.h>
#include <iostream>
#include <vector>
#include <algorithm>
#include <climits>
#include <iomanip>

using namespace std;

#define FAST       			ios_base :: sync_with_stdio(false); cin.tie(NULL); 
#define endl "\n"

typedef long long int  ll;
typedef unsigned long long int ull;


int main()
{
	FAST;
	int n;
	cin >> n;
	n = sqrt(n);
	cout << n*n;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:22:13: error: 'sqrt' was not declared in this scope
   22 |         n = sqrt(n);
      |             ^~~~
Language: C++

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

int main(){
long long int n;
  cin >> n;
  cout << (long long int)(sqrt(n))*(long long int)I(sqrt(n)) << endl;
  

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:51: error: 'I' was not declared in this scope
    8 |   cout << (long long int)(sqrt(n))*(long long int)I(sqrt(n)) << endl;
      |                                                   ^
Language: C++

  for (int i = 1; i <= n / 2; i++)
  {
    int64_t tmp;
    tmp = i * i;
    if (tmp <= n) {
      ans = tmp;
    }
    else {
      break;
    }
  }

  cout << ans << endl;

Compiler output:
a.cc:1:3: error: expected unqualified-id before 'for'
    1 |   for (int i = 1; i <= n / 2; i++)
      |   ^~~
a.cc:1:19: error: 'i' does not name a type
    1 |   for (int i = 1; i <= n / 2; i++)
      |                   ^
a.cc:1:31: error: 'i' does not name a type
    1 |   for (int i = 1; i <= n / 2; i++)
      |                               ^
a.cc:13:3: error: 'cout' does not name a type
   13 |   cout << ans << endl;
      |   ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
typedef long long ll;

int main() {
    int N;
    cin >> N;
    i = 1;
    while ((i+i)*(i+1) <= N) {
        i++
    }
    cout << i * i << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'i' was not declared in this scope
   10 |     i = 1;
      |     ^
Language: C++

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

int main() {
  	int n;
  	cin >> n;
  	cout << (int)sqrt(n)*(int)*sqrt(n) << endl;

  	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:35: error: invalid type argument of unary '*' (have '__gnu_cxx::__enable_if<true, double>::__type' {aka 'double'})
    8 |         cout << (int)sqrt(n)*(int)*sqrt(n) << endl;
      |                                   ^~~~~~~~
Language: C++

#include"iostream"

using namespace std;


int main()
{
    int n;
    cin >> n;
    int a;
   
        a = sqrt(n);
        cout << a << endl;

}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:13: error: 'sqrt' was not declared in this scope
   12 |         a = sqrt(n);
      |             ^~~~
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int n = sc.nextInt();
      int sn = Math.sqrt(n);
      if(n == sn*sn){
      	System.out.println(n);
      }else{
      	System.out.println(sn*sn);
      }
    }
}

Compiler output:
Main.java:6: error: incompatible types: possible lossy conversion from double to int
      int sn = Math.sqrt(n);
                        ^
1 error
Language: C++

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

int main() {
  double N;
  cin >> N;
  
  sqrt(N);
  
  double a;
  
  a = sqrt(N);
  
  cout << floor(a) << endl;
            
          
          
        
}​

Compiler output:
a.cc:19:2: error: '\U0000200b' does not name a type
   19 | }​
      |
Language: C++

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

int main() {
  double N;
  cin >> N;
  
  sqrt(N);
  
  double a;
  
  a = sqrt(N);
  
  cout << floor(a) << endl;
            
          
          
        


Compiler output:
a.cc: In function 'int main()':
a.cc:14:28: error: expected '}' at end of input
   14 |   cout << floor(a) << endl;
      |                            ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: C

#include <stdio.h>
int main (void){
int n;
scanf("%d",&n);
for (int i=1;;i++)
{
if (i*i>n)
{
printf ("%d\n",(i−1)∗(i−1)) ;
break;
}
}
return 0;
}



Compiler output:
main.c: In function 'main':
main.c:9:18: error: stray '\342' in program
    9 | printf ("%d\n",(i<U+2212>1)<U+2217>(i<U+2212>1)) ;
      |                  ^~~~~~~~
main.c:9:18: error: expected ')' before numeric constant
    9 | printf ("%d\n",(i−1)∗(i−1)) ;
      |                ~ ^~
      |                  )
main.c:9:21: error: stray '\342' in program
    9 | printf ("%d\n",(i<U+2212>1)<U+2217>(i<U+2212>1)) ;
      |                            ^~~~~~~~
main.c:9:24: error: stray '\342' in program
    9 | printf ("%d\n",(i<U+2212>1)<U+2217>(i<U+2212>1)) ;
      |                                      ^~~~~~~~
main.c:9:24: error: expected ')' before numeric constant
    9 | printf ("%d\n",(i−1)∗(i−1)) ;
      |                      ~ ^~
      |                        )
main.c:9:16: error: called object 'i' is not a function or function pointer
    9 | printf ("%d\n",(i−1)∗(i−1)) ;
      |                ^
main.c:5:10: note: declared here
    5 | for (int i=1;;i++)
      |          ^
Language: C++

import math
def main()
  N = int(input())
  v = int(math.sqrt(N))
  print(v*v)
  
if __name__ == "__main__":
	main()

Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

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

int main(){
    int n;
    cin>>n;
    for(int i=n;;i--){
        if(sqrt(i)==ceil(sqrt(i))) break;
    }
    cout<<i<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:11: error: 'i' was not declared in this scope
   10 |     cout<<i<<endl;
      |           ^
Language: C++


#i n cl u d e <s t d i o . h>
i n t main ( )
{
i n t num;
s c a n f (”%d ” , &num ) ;
f o r ( i n t i = 1 ; ; i++)
{
i f ( i ∗ i > num)
{
p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
break ;
}
}
}


Compiler output:
a.cc:2:2: error: invalid preprocessing directive #i; did you mean #if?
    2 | #i n cl u d e <s t d i o . h>
      |  ^
      |  if
a.cc:6:12: error: extended character ” is not valid in an identifier
    6 | s c a n f (”%d ” , &num ) ;
      |            ^
a.cc:6:16: error: extended character ” is not valid in an identifier
    6 | s c a n f (”%d ” , &num ) ;
      |                ^
a.cc:9:9: error: extended character ∗ is not valid in an identifier
    9 | i f ( i ∗ i > num)
      |         ^
a.cc:11:14: error: extended character ” is not valid in an identifier
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |              ^
a.cc:11:17: error: stray '\' in program
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |                 ^
a.cc:11:20: error: extended character ” is not valid in an identifier
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |                    ^
a.cc:11:28: error: extended character − is not valid in an identifier
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |                            ^
a.cc:11:34: error: extended character ∗ is not valid in an identifier
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |                                  ^
a.cc:11:39: error: extended character − is not valid in an identifier
   11 | p r i n t f (”%d\n ” , ( i − 1 ) ∗( i − 1 ) ) ;
      |                                       ^
a.cc:3:1: error: 'i' does not name a type
    3 | i n t main ( )
      | ^
Language: C++

#include <bits/stdc++.h>
#define REP(i, n) for(ll i = 0; i < (ll)n; i++)
#define FOR(i, a, b) for(ll i = (a); i < (ll)b; i++)
#define ALL(obj) (obj).begin(), (obj).end()
#define INF 1000000000000000
using namespace std;
typedef long long ll;
typedef double db;
typedef string str;
typedef pair<ll, ll> p;
constexpr int MOD = 1000000007;
template <class T> inline bool chmin(T &a, T b) {
    if(a > b) {
        a = b;
        return true;
    }
    return false;
}
template <class T> inline bool chmax(T &a, T b) {
    if(a < b) {
        a = b;
        return true;
    }
    return false;
}

void print(const std::vector<int> &v) {
    std::for_each(v.begin(), v.end(), [](int x) { std::cout << x << " "; });
    std::cout << std::endl;
}

int main() {
    long long N;
    cin >> N;
    int j;
    for(int i = 0; i * i <= N; i++) {
        j = i
    }
    cout << j * j << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:14: error: expected ';' before '}' token
   37 |         j = i
      |              ^
      |              ;
   38 |     }
      |     ~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int n;cin>>n;
  for(int i=2;i<31624i++){
    if(i*i>n){
      cout<<(i-1)*(i-1)<<endl;
      break;
    }
  }
}
  


Compiler output:
a.cc: In function 'int main()':
a.cc:5:23: error: no 'operator++(int)' declared for postfix '++' [-fpermissive]
    5 |   for(int i=2;i<31624i++){
      |                 ~~~~~~^~
a.cc:5:25: error: expected ';' before ')' token
    5 |   for(int i=2;i<31624i++){
      |                         ^
      |                         ;
Language: C++

#inclide<iostream>
using namespace std;

int main(){
  int n;
  cin >> n;
  for(int i=1;i<n;i++){
    if(i*i>n){
      cout << (i-1)*(i-1) << endl;
       break;
    }
  }
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inclide; did you mean #include?
    1 | #inclide<iostream>
      |  ^~~~~~~
      |  include
a.cc: In function 'int main()':
a.cc:6:3: error: 'cin' was not declared in this scope
    6 |   cin >> n;
      |   ^~~
a.cc:1:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
  +++ |+#include <iostream>
    1 | #inclide<iostream>
a.cc:9:7: error: 'cout' was not declared in this scope
    9 |       cout << (i-1)*(i-1) << endl;
      |       ^~~~
a.cc:9:7: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:30: error: 'endl' was not declared in this scope
    9 |       cout << (i-1)*(i-1) << endl;
      |                              ^~~~
a.cc:1:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
  +++ |+#include <ostream>
    1 | #inclide<iostream>
Language: C

#include <stdio.h>
int main(){
  double n,i;
  scanf("%lf,&n);
  for(i=1;(i+1)*(i+1)<n;i++);
  printf("%d",(int)i*i);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:9: warning: missing terminating " character
    4 |   scanf("%lf,&n);
      |         ^
main.c:4:9: error: missing terminating " character
    4 |   scanf("%lf,&n);
      |         ^~~~~~~~~
main.c:5:3: error: expected expression before 'for'
    5 |   for(i=1;(i+1)*(i+1)<n;i++);
      |   ^~~
main.c:7:12: error: expected ';' before '}' token
    7 |   return 0;
      |            ^
      |            ;
    8 | }
      | ~
Language: C

#include <stdio.h>
int main(){
  int n,i;
  scanf("%d"&n);
  for(i=1;(i+1)*(i+1)>n;i++);
  printf("%d",i*i);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:4:13: error: invalid operands to binary & (have 'char *' and 'int')
    4 |   scanf("%d"&n);
      |         ~~~~^
      |         |
      |         char *
Language: C++

#include<iostream>
#include<iomanip>

int main(){
  long N;
  std::cin >> N;
  long r = N;
  long count = 0;
  while(r > 9){
    r /= 10;
    count++;
  }
  long square = 1, long = 1;
  for(long i = 0; i < count; i++){
    square *= 10;
    if(i % 2 == 1) root *= 10;
  }
  if(count % 2 == 1){
    square *= 9.0 / 10;
    root *= 3;
  }
  if(N >= 9 * square){
    square *= 9;
    root *= 3;
  }else if(N >= 4 * square){
    square *= 4;
    root *= 2;
  }
  long nextS = square;
  while(nextS <= N){
    square = nextS;
    nextS += 2 * root + 1;
    root += 1;
  }
  std::cout << std::fixed;
  std::cout << std::setprecision(10) << square << std::endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:20: error: expected unqualified-id before 'long'
   13 |   long square = 1, long = 1;
      |                    ^~~~
a.cc:16:20: error: 'root' was not declared in this scope
   16 |     if(i % 2 == 1) root *= 10;
      |                    ^~~~
a.cc:20:5: error: 'root' was not declared in this scope
   20 |     root *= 3;
      |     ^~~~
a.cc:24:5: error: 'root' was not declared in this scope
   24 |     root *= 3;
      |     ^~~~
a.cc:27:5: error: 'root' was not declared in this scope
   27 |     root *= 2;
      |     ^~~~
a.cc:32:18: error: 'root' was not declared in this scope
   32 |     nextS += 2 * root + 1;
      |                  ^~~~
Language: C++

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

Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: expected ';' before '}' token
    9 |       ans=i*i
      |              ^
      |              ;
   10 |     }
      |     ~
Language: C++

#include<iostream>
using namespace std;

int main() {
	int n; cin >> n;
	for (int i = n; i > 0; i--) {
		int s = sqrt(double(i));
		if (s * s == i) {
			cout << i << endl;
			return 0;
		}
	}

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:25: error: 'sqrt' was not declared in this scope
    7 |                 int s = sqrt(double(i));
      |                         ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  for(int i=0;;i++){
    if(i*i>0){
      cout << (i-1)*(i-1) << endl;
      return 0;
    }
    


Compiler output:
a.cc: In function 'int main()':
a.cc:10:6: error: expected '}' at end of input
   10 |     }
      |      ^
a.cc:6:20: note: to match this '{'
    6 |   for(int i=0;;i++){
      |                    ^
a.cc:10:6: error: expected '}' at end of input
   10 |     }
      |      ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

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

int main(){
  int N;
  cin>>N;
  
  for(int i=0;i<N=;i++){
    
    if(i*i>N){
      cout<<(i-1)*(i-1)<<endl;
      break;
    }
  }
}
  
    


Compiler output:
a.cc: In function 'int main()':
a.cc:8:19: error: expected primary-expression before ';' token
    8 |   for(int i=0;i<N=;i++){
      |                   ^
Language: C++

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

using namespace std;

int main()
{
    int N;
    cin >> N;
    int m = static_cast<int>(sqrt(N));
    cout << m * m << endl;

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:30: error: 'sqrt' was not declared in this scope
   13 |     int m = static_cast<int>(sqrt(N));
      |                              ^~~~
Language: C++

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

int main() {
    int n; cin >> n;
    for (int i = 0; i < n; i++) {
        int tmp = i*i;

        if (tmp > n) {
            cout << (int)pow(i-1, 2) << endl;
            return 0;
        }
    }
    
    return 0;
}

Compiler output:
a.cc:1:2: error: stray '#' in program
    1 | x#include <bits/stdc++.h>
      |  ^
a.cc:1:1: error: 'x' does not name a type
    1 | x#include <bits/stdc++.h>
      | ^
a.cc: In function 'int main()':
a.cc:5:12: error: 'cin' was not declared in this scope
    5 |     int n; cin >> n;
      |            ^~~
a.cc:10:13: error: 'cout' was not declared in this scope
   10 |             cout << (int)pow(i-1, 2) << endl;
      |             ^~~~
a.cc:10:26: error: 'pow' was not declared in this scope
   10 |             cout << (int)pow(i-1, 2) << endl;
      |                          ^~~
a.cc:10:41: error: 'endl' was not declared in this scope
   10 |             cout << (int)pow(i-1, 2) << endl;
      |                                         ^~~~
Language: C++

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

int main() {
	int n; cin >> n;
	for (int i = n; n > 0; i--) {
		int root = sqrt(i);
		if (root * root == i) {
			cout << i << endl;
			break;
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:28: error: 'sqrt' was not declared in this scope
    8 |                 int root = sqrt(i);
      |                            ^~~~
Language: C++

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


int main(){
    int n;
    cin>>n;
    int i;
    int(i=1;; i++){
        if(i*i>n){
            cout<<(i-1)*(i-1)<<endl;
            break;
        }
    }
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected primary-expression before 'int'
   15 |     int(i=1;; i++){
      |     ^~~
a.cc:15:18: error: expected ';' before ')' token
   15 |     int(i=1;; i++){
      |                  ^
      |                  ;
Language: C++

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


int main(){
    int n;
    cin>>n;
    int i;
    int(i=1;; i++){
        if((i*i>n){
            cout<<(i-1)*(i-1)<<endl;
            break;
        }
    }
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:5: error: expected primary-expression before 'int'
   15 |     int(i=1;; i++){
      |     ^~~
a.cc:15:18: error: expected ';' before ')' token
   15 |     int(i=1;; i++){
      |                  ^
      |                  ;
Language: C++

#include <iostream>

using namespace std;

#define int long long

signed main(void) {
  int n; cin >> n;
  int m = (int)sqrt(n);
  cout << m * m << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: 'sqrt' was not declared in this scope
    9 |   int m = (int)sqrt(n);
      |                ^~~~
Language: C++

import sys, math
N = int(input())
for i in reversed(range(1, N + 1)):
    if math.sqrt(i) % 1 == 0:
        # if isinstance(math.sqrt(i), int):
        print(i)
        sys.exit()

Compiler output:
a.cc:5:24: error: missing binary operator before token "("
    5 |         # if isinstance(math.sqrt(i), int):
      |                        ^
a.cc:5: error: unterminated #if
    5 |         # if isinstance(math.sqrt(i), int):
a.cc:1:1: error: 'import' does not name a type
    1 | import sys, math
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
Language: C++

#include <iostream>
#include <bits/stdc++.h>
using namespace std;
int main(void){
    // Your code here!
    long ans,N,g;
    cin >> N;
    //処理
    for (int i=0;i<N;i++){
        if(i*i>N) {
            ans = (i-1)*(i-1);
            break;
        }
    }
    //解答
   cou << ans <<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:4: error: 'cou' was not declared in this scope; did you mean 'cos'?
   16 |    cou << ans <<endl;
      |    ^~~
      |    cos
Language: Java

import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
        if(int i=n; i>=0; i--){
            if(Math.sqrt(i)==(int)Math.sqrt(i)){
                System.out.println(i);
                break;
            }
        }
        
	}
}

Compiler output:
Main.java:6: error: '.class' expected
        if(int i=n; i>=0; i--){
               ^
Main.java:6: error: not a statement
        if(int i=n; i>=0; i--){
                     ^
Main.java:6: error: ';' expected
        if(int i=n; i>=0; i--){
                             ^
3 errors
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,i;
	cin>>n;
	for(i=1; ;i++){
		if(i*i>num){
			cout<<(i-1)*(i-1);
			break;
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:24: error: 'num' was not declared in this scope; did you mean 'enum'?
    7 |                 if(i*i>num){
      |                        ^~~
      |                        enum
Language: C++

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

int main(){
	long long n;
	cin>>n;
	int ans=(int)sqrt(n);
	cout<<ans*ans<<endl;
}
	


Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: 'sqrt' was not declared in this scope
    8 |         int ans=(int)sqrt(n);
      |                      ^~~~
Language: C++

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

int main(){
	long long n;
	cin>>n;
	int ans=(int)sqrt(n*1.0);
	cout<<ans*ans<<endl;
}
	


Compiler output:
a.cc: In function 'int main()':
a.cc:8:22: error: 'sqrt' was not declared in this scope
    8 |         int ans=(int)sqrt(n*1.0);
      |                      ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  for(int i = 1; i <= sqrt(n); i++) {
    if(i * i > n) {
      cout << (i - 1) * (i - 1) << endl;
      break;
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:2: error: expected '}' at end of input
   12 | }
      |  ^
a.cc:3:12: note: to match this '{'
    3 | int main() {
      |            ^
Language: C++

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


Compiler output:
a.cc: In function 'int main()':
a.cc:5:9: error: expected primary-expression before '>' token
    5 |   cin >>> n;
      |         ^
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>
using namespace std;

int main() {
	long long n; cin >> n;
	long long s = sqrt(n);
	cout << (long long(pow(s, 2))) << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:18: error: expected primary-expression before 'long'
   11 |         cout << (long long(pow(s, 2))) << endl;
      |                  ^~~~
a.cc:11:18: error: expected ')' before 'long'
   11 |         cout << (long long(pow(s, 2))) << endl;
      |                 ~^~~~
      |                  )
Language: C++

#include<iostream>
#include<string>
#include<algorithm>
#include<vector>
#include<math.h>
using namespace std;

int main() {
	long long n; cin >> n;
	long long s = sqrt(n);
	cout << long long(pow(s, 2)) << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: expected primary-expression before 'long'
   11 |         cout << long long(pow(s, 2)) << endl;
      |                 ^~~~
Language: C

#include<stdio.h>

int main(){

	int a,i,N;

	scanf_s("%d", &N, 64);

	for (i = 0;i < N;i++) {
		a = i * i;
		if (a > N) {
			printf("%d",(i-1)*(i-1));
			break;
		}
	}
	

	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    7 |         scanf_s("%d", &N, 64);
      |         ^~~~~~~
      |         scanf
Language: C++

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

int main()
{
  long int N;
  long int i=0;
  long int num
  cin >> N;
  
  for(i=0;i<N;i++)
  {
    if(i*i<N){
      cout << "" << i*i;
      break;
    }else{
      cout << "" << (i-1)*(i-1);
      break;
  }
  }
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: expected initializer before 'cin'
   10 |   cin >> N;
      |   ^~~
Language: C++

import java.util.Scanner;

public class Main {
    public static void main(String args[]){
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        //System.out.println("n = " + n);
        int ans = 1;
        for(int i = 1; i * i <= n; i++) {
            ans = i * i;
        }
        System.out.println(ans);
    }
}

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

#include <bits/stdc++.h>
using namespace std;
int main(){
  int a;cin>>a;
  for(int i=0;i++){
    if(i*i>a)cout<<(i-1)*(i-1);
    break;}}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:18: error: expected ';' before ')' token
    5 |   for(int i=0;i++){
      |                  ^
      |                  ;
Language: C++

#include <iostream>
using namespace std;

int heihou(int n){
  count=0;
  for(int i=1;i<100000;i++){
    if(i*i==n){
      count++;
    }
  }
  return count;
}

int main(){
  int n;
  cin >> n;
  for(int i=n;;i--){
    if(heihou(i)==1){
      cout << i << endl;
      break;
    }
  }
}

Compiler output:
a.cc: In function 'int heihou(int)':
a.cc:5:3: error: 'count' was not declared in this scope
    5 |   count=0;
      |   ^~~~~
Language: C++

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

typedef long long int ll;
typedef pair<ll, ll> pll;

#define FOR(i, n, m) for (ll(i) = (m); (i) < (n); ++(i))
#define REP(i, n) FOR(i, n, 0)
#define OF64 std::setprecision(10)

const ll MOD = 1000000007;
const ll INF = (ll)1e15;

int main()
{
    ll N;
    cin >> N;
    ll max = 0;
    for (ll i = 1; i * i <= N; ++i)
    {
        max = std::max(max, i * i);
    }
    ccout << max << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:5: error: 'ccout' was not declared in this scope
   23 |     ccout << max << endl;
      |     ^~~~~
Language: C++

#include <iostream>
using namespace std;

int main()
{
  int n;
  cin >> n;
  long long k;
  for(int i = 0; i * i <= n; i++{
    k = i * i;
  }
  cout << k << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:33: error: expected ')' before '{' token
    9 |   for(int i = 0; i * i <= n; i++{
      |      ~                          ^
      |                                 )
Language: C++

#include<iostream>
using namespace std;
int main()
{
  long long n,i;
  cin >> n;
  for(i=1; i*i<=n; i++){
    if(i*i == n){
      i++;
      break;
  }
  cout << (i-1) * (i-1) << endl;
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:2: error: expected '}' at end of input
   15 | }
      |  ^
a.cc:4:1: note: to match this '{'
    4 | {
      | ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    for(int i=n;i>0;i--){
     if(sqat(i)*sqat(i)==i){
         cout<<i<<endl;return 0;
     }
    }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: 'sqat' was not declared in this scope; did you mean 'sqrt'?
    8 |      if(sqat(i)*sqat(i)==i){
      |         ^~~~
      |         sqrt
Language: C++

#include <iostream>
#include <string>
#include<algorithm>
using namespace std;
int main()
{
    int n;
    cin>>n;
    for(int i=n;i>0;i--){
     if(sqrt(i)*sqrt(i)==i){
         cout<<i<<endl;return 0;
     }
    }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'sqrt' was not declared in this scope
   10 |      if(sqrt(i)*sqrt(i)==i){
      |         ^~~~
Language: C++

#include <iostream>
#include <string>
#include<algorithm>
using namespace std;
int main()
{
    int n;
    cin>>n;
    for(int i=n;i>0;i--){
     if(sqrt(i)==sqrt(i)/1){
         cout<<i<<endl;return 0;
     }
    }
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:9: error: 'sqrt' was not declared in this scope
   10 |      if(sqrt(i)==sqrt(i)/1){
      |         ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
	int N = 0;
	cin >> N;
	int r = (int)std::sqrt(N);
	for (; r*r <= N; r++) {		
	}
	r--;
	cout << r * r << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:27: error: 'sqrt' is not a member of 'std'
    7 |         int r = (int)std::sqrt(N);
      |                           ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
	int N = 0;
	cin >> N;
	int r = (int)sqrt(N);
	for (; r*r <= N; r++) {		
	}
	r--;
	cout << r * r << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: 'sqrt' was not declared in this scope
    7 |         int r = (int)sqrt(N);
      |                      ^~~~
Language: C++

#include<iosteram>
#include<cmath>
using namespace std;

int main(){
  int N;
  cin>>N;
  int ans=sqrt(N);
  cout<<ans<<endl;
  
}

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

#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int n,x;
    cin>>n;
    x=sqrt(n);
    cout<<x*x<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'cin' was not declared in this scope
    7 |     cin>>n;
      |     ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<cmath>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:9:5: error: 'cout' was not declared in this scope
    9 |     cout<<x*x<<endl;
      |     ^~~~
a.cc:9:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:16: error: 'endl' was not declared in this scope
    9 |     cout<<x*x<<endl;
      |                ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<cmath>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C++

#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    int n,x;
    cin>>n;
    x=sqrt(n));
    cout<<x*x<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:5: error: 'cin' was not declared in this scope
    7 |     cin>>n;
      |     ^~~
a.cc:3:1: note: 'std::cin' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
    2 | #include<cmath>
  +++ |+#include <iostream>
    3 | using namespace std;
a.cc:8:14: error: expected ';' before ')' token
    8 |     x=sqrt(n));
      |              ^
      |              ;
a.cc:9:5: error: 'cout' was not declared in this scope
    9 |     cout<<x*x<<endl;
      |     ^~~~
a.cc:9:5: note: 'std::cout' is defined in header '<iostream>'; this is probably fixable by adding '#include <iostream>'
a.cc:9:16: error: 'endl' was not declared in this scope
    9 |     cout<<x*x<<endl;
      |                ^~~~
a.cc:3:1: note: 'std::endl' is defined in header '<ostream>'; this is probably fixable by adding '#include <ostream>'
    2 | #include<cmath>
  +++ |+#include <ostream>
    3 | using namespace std;
Language: C++

#include <iostream>
using namespace std;
 
int main() {
  int N;
  cin >> N;
  int a=sqrt(N);
  cout << a*a << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:9: error: 'sqrt' was not declared in this scope
    7 |   int a=sqrt(N);
      |         ^~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
  int N;
  cin >> N;
  int a=sqrt(n);
  cout << a*a << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:14: error: 'n' was not declared in this scope
    7 |   int a=sqrt(n);
      |              ^
a.cc:7:9: error: 'sqrt' was not declared in this scope
    7 |   int a=sqrt(n);
      |         ^~~~
Language: C++

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

using namespace std;



int main(void){
	int n;
	cin >> n;
	for(int i=n;i>0;i--){
		if(sqrt(i) *sqrt(i) == i){
		cout << i << endl;
		break;
		}
	}
	

	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:14:20: error: 'sqrt' was not declared in this scope
   14 |                 if(sqrt(i) *sqrt(i) == i){
      |                    ^~~~
Language: C++

#include <iostream>
#include <vector>
using namespace std;
 
int main(){
  int N;
  cin >> N;
  vector<int> a(50000);
  for(int i=0;i<40000;i++){
    a.at(i)=i*i;
    if(a.at(i)>N){
      break;
    }
  }
  cout << a.at(i-1) << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:16: error: 'i' was not declared in this scope
   15 |   cout << a.at(i-1) << endl;
      |                ^
Language: C++

#include <iostream>
#include <vector>
using namespace std;
 
int main(){
  int N;
  cin >> N;
  vector<int> a(50000);
  for(int i=0;i<40000;i++){
    a.at(i)=i*i;
    if(a.at(i)>N){
      break;
    }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:14:4: error: expected '}' at end of input
   14 |   }
      |    ^
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

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

int main(){
  int N;
  cin >> N;
  vector<int> a(50000);
  for(int i=0;i<;i++){
    a.at(i)=i*i;
    if(a.at(i)>N){
      break;
    }
  }
  cout << a.at(i-1) << endl;
}
  
    

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: expected primary-expression before ';' token
    9 |   for(int i=0;i<;i++){
      |                 ^
a.cc:15:16: error: 'i' was not declared in this scope
   15 |   cout << a.at(i-1) << endl;
      |                ^
Language: C++

#include <iostream>
#include <algorithm>
#include <cmath>
#include <limits>
#include <vector>
#include<cstdio>
#include<bits/stdc++.h>
using namespace std;
using ll =long long;

int main (void) {
  ll N;
  ll ans;
  ll i=0;
  cin >> N;
  while(N>ans){
    ans=i*i;
    i++
  }
  ans=(i-1)**2
  cout << ans;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:8: error: expected ';' before '}' token
   18 |     i++
      |        ^
      |        ;
   19 |   }
      |   ~     
a.cc:20:13: error: invalid type argument of unary '*' (have 'int')
   20 |   ans=(i-1)**2
      |             ^~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    ll N;
    cin>>N;
    ll root_n=(ll )sqrt(N);
    cout<<root_n*root_n<<"\n";
    return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:4:5: error: 'll' was not declared in this scope
    4 |     ll N;
      |     ^~
a.cc:5:10: error: 'N' was not declared in this scope
    5 |     cin>>N;
      |          ^
a.cc:6:7: error: expected ';' before 'root_n'
    6 |     ll root_n=(ll )sqrt(N);
      |       ^~~~~~~
      |       ;
a.cc:7:11: error: 'root_n' was not declared in this scope
    7 |     cout<<root_n*root_n<<"\n";
      |           ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
  int n;
  cin>>n;
  
  for(int i=0;i*i<=n;i++){
    s=i*i;
  }
  
  cout<<s<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 's' was not declared in this scope
    8 |     s=i*i;
      |     ^
a.cc:11:9: error: 's' was not declared in this scope
   11 |   cout<<s<<endl;
      |         ^
Language: C++

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

typedef long long ll;

#define min(a, b) (((a) < (b))? (a):(b))
#define max(a, b) (((a) > (b))? (a):(b))
#define REP(i, a, n) for(int i=(a); i<(n); i++)
#define rep(i, n) REP(i, 0, (n))
#define square(a) (a)*(a)
#define pb push_back

int n;
int main(){
    cin >> n;
    rep(i,n){
        if(i*i=>n){
            int ans = (i-1)*(i-1);
            break;
        }
    }
    cout << ans << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:22:16: error: expected primary-expression before '>' token
   22 |         if(i*i=>n){
      |                ^
a.cc:27:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   27 |     cout << ans << endl;
      |             ^~~
      |             abs
Language: C++

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

typedef long long ll;

#define min(a, b) (((a) < (b))? (a):(b))
#define max(a, b) (((a) > (b))? (a):(b))
#define REP(i, a, n) for(int i=(a); i<(n); i++)
#define rep(i, n) REP(i, 0, (n))
#define square(a) (a)*(a)
#define pb push_back

int n;
int main(){
    cin >> n;
    if(n=1) cout << 1 << endl;
    break;
    rep(i,n){
        if(i*i>n){
            cout << (i-1)*(i-1) << endl;
            break;
        }
    }
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:5: error: break statement not within loop or switch
   22 |     break;
      |     ^~~~~
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)

using namespace std;
typedef long long int lli;

int main(){
	int N;
	cin>>N;
	
	int sq=0;
	rep1(i,40000)if(i*i<=N) sq=i*i
	cout<<sq;
	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:39: error: expected ';' before 'cout'
   16 |         rep1(i,40000)if(i*i<=N) sq=i*i
      |                                       ^
      |                                       ;
   17 |         cout<<sq;
      |         ~~~~
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)

using namespace std;
typedef long long int lli;

int main(){
	int N;
	cin>>N;
	
	int sq=0;
	for(i=1;i<=40000;i++){
		if(i*i<=N) sq=i*i;
	}
	cout<<sq;
	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: 'i' was not declared in this scope
   16 |         for(i=1;i<=40000;i++){
      |             ^
Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#define rep(i,n) for(int (i)=0;(i)<(n);(i)++)
#define rep1(i,n) for(int i=1;i<=(int)(n);i++)

using namespace std;
typedef long long int lli;

int main(){
	int N;
	cin>>N;
	
	int sq=0;
	for(i=1;i<=40000;i++){
		if(i*i<=N) sq=i*i
	}
	cout<<sq;
	
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:13: error: 'i' was not declared in this scope
   16 |         for(i=1;i<=40000;i++){
      |             ^
Language: C++

#include <cstdio>
#include <cmath>
int main(){
  int a;
  scanf("%d",&a);
  a=(int)sqrt(a);
  printf("%d\n",a*a);

Compiler output:
a.cc: In function 'int main()':
a.cc:7:22: error: expected '}' at end of input
    7 |   printf("%d\n",a*a);
      |                      ^
a.cc:3:11: note: to match this '{'
    3 | int main(){
      |           ^
Language: C++

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

int main() {
	int N;
	cin >> N;
	int64_t ans = N / 2;
	for (int i = 0, j = N;i < j;ans = i + (j - i) / 2) { // 二分探索アルゴリズム
		if (ans * ans <= N) i = ans + 1; // iは求める値の範囲の下限
		else j = ans - 1; // jは求める値の範囲の上限
	}
	if (ans * ans > N) ans --; // この二分探索アルゴリズムだと最終的に1だけ多いことがあるので
	cout << ans * ans;
	return 0;
}
/*
31536000のコメント解説欄
ここテンプレで用意してるから、A問題とかだとこの先空欄の危険あり

N以下の平方数のうち最大のものの平方根をMとする
この時、1～Mまでは二乗してもN以下であり、M+1～Nまでは二乗するとNより大きい
これを利用すると、二分探索を用いてMを特定することができる
後はM^2を出力すればいい
オーダーはO(logN)であり、高速に振舞う

あ、計算の都合上時々ansは10^9*10^9==10^18<=2^60まで扱うので64bitの整数を使わないとオーバーフローするよ
*/

Compiler output:
a.cc:2:9: fatal error: stdint: No such file or directory
    2 | #include<stdint>
      |         ^~~~~~~~
compilation terminated.
Language: C++

#include<iostream>
#include<vector>
#include<string>
#include<queue>
#include<algorithm>
using namespace std;
int N;
vector<string> field;
int main() {
	cin >> N;
	int ans = 0;
	for (int i = 1; i < N; ++i) {
		if (i == sqrt(i)*sqrt(i))
			ans = max(ans, i);
	}
	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:26: error: 'sqrt' was not declared in this scope
   13 |                 if (i == sqrt(i)*sqrt(i))
      |                          ^~~~
Language: Java

import java.util.Scanner;

public class B_77 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();int max=0;
		for(int i=1;i*i<=N;i++) max = i * i; 
		System.out.println(max);
	}

}


Compiler output:
Main.java:3: error: class B_77 is public, should be declared in a file named B_77.java
public class B_77 {
       ^
1 error
Language: C++

#include <iostream>
using namespace std;

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

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: expected initializer before 'for'
    7 |   for(int i=1;i*i<=n;i++){
      |   ^~~
a.cc:7:15: error: 'i' was not declared in this scope
    7 |   for(int i=1;i*i<=n;i++){
      |               ^
a.cc:10:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |   cout << ans << endl;
      |           ^~~
      |           abs
Language: C++

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

int main(){
 
  ll n;
  cin >> n;
  ll a = 1;
  ll b = 40000;
  ll c;
  ll ans;
  while(1){
    c = (a+b)/2;
    if(c*c<n){
      a = c;
    }else{
      b = c;
          if((c+1)*(c+1)>n){
            ans = c;
            break;
          }
    }

    cout << c*c<<endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:27:2: error: expected '}' at end of input
   27 | }
      |  ^
a.cc:5:11: note: to match this '{'
    5 | int main(){
      |           ^
Language: C++

#include<iostream>
#include<math.h>
#include<string>
#include<algorithm>
using namespace std;

#define rep0(n) for(int i=0;i<n;i++)
#define rep(n) for(int i=1;i<=n;i++)

double const pi=3.1415926535;

int printint(int n){
	cout<<n<<endl;
	return 0;
}

int prints(string s){
	cout<<s<<endl;
	return 0;
}

int main(){
	int n;
	cin>>n;
	unsigned long long s;
	for(int i=40000;i>=1;i--){
		s=i*i;
		s<=n ? cout<<s<<endl : continue;
		return 0;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:28:40: error: expected primary-expression before 'continue'
   28 |                 s<=n ? cout<<s<<endl : continue;
      |                                        ^~~~~~~~
Language: C++

#include <iostream>
#include <cmath>
int main() {
  int N;
  cin >> N;
  int i = sqrt(N * 1.0000000000001);
  cout << i * i << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin >> N;
      |   ^~~
      |   std::cin
In file included from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:7:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    7 |   cout << i * i << endl;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:7:20: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
    7 |   cout << i * i << endl;
      |                    ^~~~
      |                    std::endl
In file included from /usr/include/c++/14/iostream:41:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
Language: Java

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int answer = 0;
		for (int i = 0; i <= n; i++) {
			if (Math.pow(i, 2) <= n && Math.pow(i, 2) > answer) {
				answer = Math.pow(i, 2);
			}
		}
		System.out.println(answer);
		sc.close();
	}

}


Compiler output:
Main.java:11: error: incompatible types: possible lossy conversion from double to int
				answer = Math.pow(i, 2);
				                 ^
1 error