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

import java.util.*;
public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
			solve();
	}

	public static void solve() { 
		
		long a = sc.nextInt();
		long b = sc.nextInt();
		long c = sc.nextInt();
		long d = sc.nextInt();
		long max = Long.MIN_VALUE;
		long n1 = a * c;
		long n2 = a * d;
		long n3 = b * c;
		long n4 = b * d;
		max = Math.max(max, Math.max(n1, Math.max(n2, Math.max(n3, n4))));
		System.out.println(max);
	}


Compiler output:
Main.java:21: error: reached end of file while parsing
	}
	 ^
1 error
Language: C++

#include <iostream>
using namespace std;
int main()
{
 int a,b,c,d;
 cin>>a>>b>>c>>d;
  int t[4]=0;
  t[0]=a*c;
  t[1]=a*d;
  t[2]=b*c;
  t[3]=b*d;
  int max=t[0];
  for(int i=1;i<4;i++){
     if(max<t[i]){max=t[i]};
  }
  cout<<max<<endl;
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:12: error: array must be initialized with a brace-enclosed initializer
    7 |   int t[4]=0;
      |            ^
a.cc:14:27: error: expected ';' before '}' token
   14 |      if(max<t[i]){max=t[i]};
      |                           ^
      |                           ;
Language: C

#include<stdio.h>
int main(){
    int a,b,c,d;
   if(scanf("%d%d%d%d",&a,&b,&c,&d)){
   }
  else{pritnf("%d"Failed to read value;
              }
    int e;
    int max;
       max=e=a*c;
       e=a*d;
       if(e>max) max=e;
         e=b*c;
         if(e>max) max=e;
           e=b*d;
            if(e>max) max=e;
             printf("%d",e);
 
}

Compiler output:
main.c: In function 'main':
main.c:6:8: error: implicit declaration of function 'pritnf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    6 |   else{pritnf("%d"Failed to read value;
      |        ^~~~~~
      |        printf
main.c:6:19: error: expected ')' before 'Failed'
    6 |   else{pritnf("%d"Failed to read value;
      |              ~    ^~~~~~
      |                   )
main.c:6:40: error: expected ';' before '}' token
    6 |   else{pritnf("%d"Failed to read value;
      |                                        ^
      |                                        ;
    7 |               }
      |               ~
Language: C++

#include<iostream>

using namespace std;

int main(){
	
	int a, b, c, d;
	cin>>a>>b>>c>>d;
	if(b>=0 && d>=0) cout<<b*d;
	else if(b=<0 && d=<0) cout<<b*d;
	else if(d>=0 && b=<0) cout<<b*c;
	else cout<<a*d;
	
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:19: error: expected primary-expression before '<' token
   10 |         else if(b=<0 && d=<0) cout<<b*d;
      |                   ^
a.cc:10:27: error: expected primary-expression before '<' token
   10 |         else if(b=<0 && d=<0) cout<<b*d;
      |                           ^
a.cc:11:27: error: expected primary-expression before '<' token
   11 |         else if(d>=0 && b=<0) cout<<b*c;
      |                           ^
Language: C++

#include<iostream>
using namespace std;

int main(){
int a, b, c, d;
cin >> a >> b >> c >> d;
if (a >= 0) {
	if (d >= 0) {
		cout << b * d << endl;
	}
	else {
		cout << a * d << endl;
	}
}
else if (a < 0 && b >= 0) {
	if (c >= 0) {
		cout << b * d << endl;
	}
	else if (c < 0 && d >= 0) {
		cout << max(a * c, b * d);
	}
	else {
		cout << a * c;
	}
}
else if (b < 0) {
	if (c >= 0) {
		cout << b * c << endl;
	}
	else if (c < 0 && d >= 0) {
		cout << a * c << endl;
	}

	else {
		cout << a * c << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:2: error: expected '}' at end of input
   37 | }
      |  ^
a.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
Language: C++

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

int main() {
 int a, b, c, d;
 cin >> a >> b >> c >> d;
 
 if (a >= 0 && c >= 0) cout << b * d << endl;
 else if (b <= 0 && d <= 0) cout << a * c << endl;
 else if (a >= 0 && d <= 0) cout << a * d << endl;
 else if (b <= 0 && c >= 0) cout << b * c << endl;
 else if (ab <= 0 && cd <= 0) cout << max(a * c, b * d) << endl;
 else if (a > 0 && cd < 0) cout << b * d << endl;
 else if (ab < 0 && c > 0) cout << b * d << endl;

  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: 'ab' was not declared in this scope; did you mean 'b'?
   12 |  else if (ab <= 0 && cd <= 0) cout << max(a * c, b * d) << endl;
      |           ^~
      |           b
a.cc:12:22: error: 'cd' was not declared in this scope; did you mean 'd'?
   12 |  else if (ab <= 0 && cd <= 0) cout << max(a * c, b * d) << endl;
      |                      ^~
      |                      d
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define rep(i, m) for (int i = 0; i < (int)(m); i++)
 
int main() {
  long long  a,b,c,d;
  cin>>a>>b>>c>>d;
  long long  max;
    max=a*c;

 if(a*d>max){max=a*d;}
 if(b*c>max){max=b*c;}
 if(b*d>max){max=b*d;}
 if(a*c>max){max=a*c;}
  
 cout<<max;


Compiler output:
a.cc: In function 'int main()':
a.cc:16:12: error: expected '}' at end of input
   16 |  cout<<max;
      |            ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

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

struct Union{
  vector<ll> par;
  Union(ll a){
  par=vector<ll>(a,-1);
  }
  ll find(ll a){
    if(par[a]<0){
      return a;
    }
    else{
      return par[a]=find(par[a]);
    }
  }
  bool same(ll a,ll b){
    return (find(a)==find(b));
  }
  ll size(ll a){
    return -par[find(a)];
  }
  void unite(ll a,ll b){
    ll c=find(a),d=find(b);
    if(c==d)
      return;
    if(size(c)<size(d)){
      swap(c,d);
    }
    par[c]+=par[d];
    par[d]=c;
  }
};
ll euclidean_gcd(ll a, ll b) {
  if(a < b) return euclidean_gcd(b, a);
  ll r;
  while ((r=a%b)) {
    a = b;
    b = r;
  }
  return b;
}
ll euclidean_lcm(ll a, ll b) {
  return a/euclidean_gcd(a,b)*b;
}

ll binary(ll bina){
    ll ans = 0;
    for (ll i = 0; bina>0 ; i++)
    {
        ans += bina%2;
        bina = bina/2;
    }
    return ans;
}
void revStr(char* str){
	int size = strlen(str);
	int i,j;
	char tmp = {0};
	
	for(i = 0, j = size - 1; i < size / 2; i++, j--){
		tmp = str[i];
		str[i] = str[j];
		str[j] = tmp;
	}
	return;	
}
int main(void){
  ll a,b,c,d;
  cin >> a >> b >> c >> d;
  ll n=max(a*c,max(b*d,max(a*d,b*c))));
  cout << n;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:77:38: error: expected ',' or ';' before ')' token
   77 |   ll n=max(a*c,max(b*d,max(a*d,b*c))));
      |                                      ^
Language: C++

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

int main() {
    int a,b,c,d;
    int x,AC,AD,BC,BD;
    cin >> a >> b >> c >> d;
    AC = a*c;
    AD = a*d;
    BC = b*c;
    BD = b*d;
    x = max(AC,AD,BC,BD);
    cout << x << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:13:12: error: no matching function for call to 'max(int&, int&, int&, int&)'
   13 |     x = max(AC,AD,BC,BD);
      |         ~~~^~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 4 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 4 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 4 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 4 provided
Language: C++

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

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;

    cout << max(a*c, a*d, b*c, b*d) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: no matching function for call to 'max(int, int, int, int)'
    9 |     cout << max(a*c, a*d, b*c, b*d) << endl;
      |             ~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 4 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 4 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 4 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 4 provided
Language: C++

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

int main(){
	int a,b,c,d;
	cin >> a >> b >> c >> d;
	if(a > 0 && b > 0){
		if(c > 0 && d > 0){ 
			cout << b * d << endl
			return 0;
		}
		else if(c<0 && d <0){
			cout << a * d << endl;
			return 0;
		}
		else if(c<0 && d >0){
			cout << b * d << endl;
			return 0;
		}
	}
	if(a < 0 && b > 0){
		if(c > 0 && d > 0){ 
			cout << b * d << endl
			return 0;
		}
		else if(c<0 && d <0){
			cout << max(a*c,a*d) << endl;
			return 0;
		}
		else if(c<0 && d >0){
			cout << max(a*c,b*d) << endl;
			return 0;
		}
	}
	if(a < 0 && b < 0){
		if(c > 0 && d > 0){ 
			cout << max(a*c,b*c) << endl
			return 0;
		}
		else if(c<0 && d <0){
			cout << a * d << endl;
			return 0;
		}
		else if(c<0 && d >0){
			cout << max(a*c,b*d) << endl;
			return 0;
		}
	}
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:46: error: expected ';' before 'return'
    9 |                         cout << b * d << endl
      |                                              ^
      |                                              ;
   10 |                         return 0;
      |                         ~~~~~~                
a.cc:23:46: error: expected ';' before 'return'
   23 |                         cout << b * d << endl
      |                                              ^
      |                                              ;
   24 |                         return 0;
      |                         ~~~~~~                
a.cc:37:53: error: expected ';' before 'return'
   37 |                         cout << max(a*c,b*c) << endl
      |                                                     ^
      |                                                     ;
   38 |                         return 0;
      |                         ~~~~~~
Language: C++

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

int main()
{
	long long a,b,c, d;
	cin >> a >> b >> c >> d;
	long long ans = INT_MIN;
	for (int i = a; i <= b; i++)
	{
		long long tmp = i;
		for (int j = c; j <= d; j++)
		{
			ans = max(ans, tmp * j);
		}
	}
	cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:25: error: 'INT_MIN' was not declared in this scope
   11 |         long long ans = INT_MIN;
      |                         ^~~~~~~
a.cc:5:1: note: 'INT_MIN' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    4 | #include <map>
  +++ |+#include <climits>
    5 | using namespace std;
Language: C++

#include <bits/stdc++.h>
using namespace std;
//#pragma GCC optimize(2)
#define IO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0)
#define ull unsigned long long
#define ll long long
#define rep(i, x, y) for(int i=x;i<=y;i++)
#define mms(x, n) memset(x, n, sizeof(x))
#define mmc(A, tree) memcpy(A, tree, sizeof(tree))
#define eps (1e-8)
#define PI (acos(-1.0))
#define INF (0x3f3f3f3f)
#define mod (ull)(1e9+7)
typedef pair<int, int> P;

int main() {
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
#endif
  int a, b, c, d;
  int ans = -INF;
  scanf("%d%d%d%d", &a, &b, &c, &d);
  ans = max(ans, max(a * d, max(a * c, max(b * c, b * d)));
            printf("%d", ans);
            return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:23:59: error: expected ')' before ';' token
   23 |   ans = max(ans, max(a * d, max(a * c, max(b * c, b * d)));
      |            ~                                              ^
      |                                                           )
Language: C++

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

int main()
{
	double a,b,c, d;
	cin >> a >> b >> c >> d;
	int ans = INT_MIN;
	for (int i = a; i <= b; i++)
	{
		int tmp = i;
		for (int j = c; j <= d; j++)
		{
			ans = max(ans, tmp * j);
		}
	}
	cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:19: error: 'INT_MIN' was not declared in this scope
   11 |         int ans = INT_MIN;
      |                   ^~~~~~~
a.cc:5:1: note: 'INT_MIN' is defined in header '<climits>'; this is probably fixable by adding '#include <climits>'
    4 | #include <map>
  +++ |+#include <climits>
    5 | using namespace std;
Language: C++

# include <bits/stdc++.h>
# define rep(i, n) for(int i=0, i##_len=(n); i<i##_len; ++i)
# define reps(i, n) for(int i=1, i##_len=(n); i<=i##_len; ++i)
# define rrep(i, n) for(int i=((int)(n)-1); i>=0; --i)
# define rreps(i, n) for(int i=((int)(n)); i>0; --i)
# define ALL(x) (x).begin(), (x).end()
# define SZ(x) ((int)(x).size())
# define pb push_back
# define optimize_cin() cin.tie(0); ios::sync_with_stdio(false)
using namespace std;
using ll = long long;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int main() {
  ll a, b, c, d; cin >> a >> b >> c >> d;

  ll ans = max({a*c, a*d, b*c, b*d});
  if(a <= 0 && 0<= b) chmax(ans, 0);
  if(c<= 0 && 0<= d) chmax(ans, 0);
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:19:28: error: no matching function for call to 'chmax(ll&, int)'
   19 |   if(a <= 0 && 0<= b) chmax(ans, 0);
      |                       ~~~~~^~~~~~~~
a.cc:12:23: note: candidate: 'template<class T> bool chmax(T&, const T&)'
   12 | template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
      |                       ^~~~~
a.cc:12:23: note:   template argument deduction/substitution failed:
a.cc:19:28: note:   deduced conflicting types for parameter 'const T' ('long long int' and 'int')
   19 |   if(a <= 0 && 0<= b) chmax(ans, 0);
      |                       ~~~~~^~~~~~~~
a.cc:20:27: error: no matching function for call to 'chmax(ll&, int)'
   20 |   if(c<= 0 && 0<= d) chmax(ans, 0);
      |                      ~~~~~^~~~~~~~
a.cc:12:23: note: candidate: 'template<class T> bool chmax(T&, const T&)'
   12 | template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
      |                       ^~~~~
a.cc:12:23: note:   template argument deduction/substitution failed:
a.cc:20:27: note:   deduced conflicting types for parameter 'const T' ('long long int' and 'int')
   20 |   if(c<= 0 && 0<= d) chmax(ans, 0);
      |                      ~~~~~^~~~~~~~
Language: C++

#include<iostream>
#include<vector>
#include<set>
#include<stack>
#include<string>
#include<utility>
#include<cstring>
#include<cstdio>
#include<cstdlib>
#include<cctype>
#include<span>
#include<algorithm>
#include<cinttypes>

using namespace std;
using ll = long long;
using vi = vector<int>;

template <typename T>
T ceil(T a, T b){
    return !(a%b) ? a/b : a/b+1 ;
}

template <typename T>
T gcd( T a, T b ) { 
    return !a ? b : gcd( b%a, a);
}

template <typename T>
T lcm( T a, T b ) {
    return (a*b)/gcd(a,b);
}

template <typename T>
std::istream& operator<<(std::istream& io,std::vector<T>& v){
    for(auto &x: v){
        io >> x;
    }
    return io;
}

template <typename T>
std::ostream& operator>>(std::ostream& os, std::vector<T>const v){
    for(auto x: v){
        std::cout << x << ' ';
    }
    std::cout << '\n';
    return os;
}

#define bug(a) std::cout << #a << ' ' << a << '\n';

template <typename T>
void debug( vector<T> &v ){
    for(decltype(v.size()) i = 0; i < v.size(); ++i){
        std::cout << "v[" << i << "]: " << v[i] << '\n';
    }
}

template <typename T>
std::ostream& operator<<(std::ostream& os,std::span<T> a){
    for(auto x: a){
        os << a << ' ';
    }
    os.put('\n');
    return os;
}

template <typename T>
void debug(std::span<T> a){
    for(auto i=0; i < a.size(); ++i){
        cout << "a[" << i << "]: " << a[i] << '\n';
    }
}

#define all(a)  std::begin((a)),std::end((a))
#define po2(a) { ((a)&((a)-1)) == 0 }
#define endl '\n'


int main(){
    ll a,b,c,d;
    cin >> a >> b >> c >> d;
    ll result = max( max(a,b)*max(c,d), max( max(a,b)*min(c,d), max( min(a,b)*max(c,d), min(a,b)*min(c,d))));
    cout << result << endl;

#ifdef __linux__
    cout<<"Have you checked for lowest constraints?"<<endl;
    cout<<"Have you checked for highest constraints?"<<endl;
    cout<<"Check for time complexity!"<<endl;
    cout<<"Check for 1 and 0"<<endl;
    cout<<"Check for time, you stupid!"<<endl;
#endif

    return 0;
}





Compiler output:
a.cc:61:43: error: 'std::span' has not been declared
   61 | std::ostream& operator<<(std::ostream& os,std::span<T> a){
      |                                           ^~~
a.cc:61:52: error: expected ',' or '...' before '<' token
   61 | std::ostream& operator<<(std::ostream& os,std::span<T> a){
      |                                                    ^
a.cc: In function 'std::ostream& operator<<(std::ostream&, int)':
a.cc:62:17: error: 'a' was not declared in this scope
   62 |     for(auto x: a){
      |                 ^
a.cc: At global scope:
a.cc:70:6: error: variable or field 'debug' declared void
   70 | void debug(std::span<T> a){
      |      ^~~~~
a.cc:70:17: error: 'span' is not a member of 'std'
   70 | void debug(std::span<T> a){
      |                 ^~~~
a.cc:70:17: note: 'std::span' is only available from C++20 onwards
a.cc:70:23: error: expected primary-expression before '>' token
   70 | void debug(std::span<T> a){
      |                       ^
a.cc:70:25: error: 'a' was not declared in this scope
   70 | void debug(std::span<T> a){
      |                         ^
Language: Java

import java.util.Scanner;

public class Product_Max {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        long[] params = new long[4];
        for (int i = 0; i < 4; i++) {
            params[i] = scanner.nextInt();
        }
        long a = params[0];
        long b = params[1];
        long c = params[2];
        long d = params[3];
        
        if (a >= 0) {
            if (c >= 0) {
                System.out.println(b * d);
            } else if (d >= 0) {
                System.out.println(b * d);
            } else {
                System.out.println(a * d);
            }
        } else if (b >= 0) {

            if (c >= 0) {
                System.out.println(b * d);
            } else if (d >= 0) {
                if (a * c  > b * d) {
                    System.out.println(a * c );
                } else {
                    System.out.println(b * d);
                }
            } else {
                System.out.println(b * d);
            }
            
        } else {

            if (c >= 0) {
                System.out.println(b * c);
            } else if (d >= 0) {
                System.out.println(a * c);
            } else {
                System.out.println(a * c);
            }
            
        }
    }
}

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

#include<cstdio>
#include<iostream>
#include<vector> 
#define mk make_pair
#define pk push_back 
using namespace std;
typedef long long LL;
typedef pair<int,int> pi;
int main(){
	ios::sync_with_stdio(false);
	LL a,b,c,d;
	cin>>a>>b>>c>>d;
	LL ans=-1e18;
	if(a<=0&&b>=0) ans=max(ans,0);
	if(c<=0&&d>=0) ans=max(ans,0);
	ans=max(ans,a*c);
	ans=max(ans,a*d);
	ans=max(ans,b*c);
	ans=max(ans,b*d);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:31: error: no matching function for call to 'max(LL&, int)'
   14 |         if(a<=0&&b>=0) ans=max(ans,0);
      |                            ~~~^~~~~~~
In file included from /usr/include/c++/14/string:51,
                 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:2:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:14:31: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   14 |         if(a<=0&&b>=0) ans=max(ans,0);
      |                            ~~~^~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
a.cc:15:31: error: no matching function for call to 'max(LL&, int)'
   15 |         if(c<=0&&d>=0) ans=max(ans,0);
      |                            ~~~^~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:15:31: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   15 |         if(c<=0&&d>=0) ans=max(ans,0);
      |                            ~~~^~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
Language: C++

#include <iostream>
using namespace std;
#define ll long long

int main(void){
    // Your code here!
    ll a,b,c,d,x,y;
    cin>>a>>b>>c>>d;
   
    ll arr[4];
    arr[0]=a*c;
    arr[1]=a*d;
    arr[2]=b*c;
    arr[3]=b*d;
    
    x=*max_element(arr,arr+4);
    cout<<x<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:16:8: error: 'max_element' was not declared in this scope
   16 |     x=*max_element(arr,arr+4);
      |        ^~~~~~~~~~~
Language: C

#include<stdio.h>
 
int main( void )
{
  int a,b,c,d;
  int max;
  scanf("%d %d %d %d",&a,&b.&c,&d);
  max=a*c;
  if(max<a*d)
  {
    max=a*d;
  }
  if(max<b*c)
  {
    max=b*c;
  }
  if(max<b*d)
  {
    max=b*d;
  }
  printf("%d\n",max);
  return 0;
}

Compiler output:
main.c: In function 'main':
main.c:7:29: error: expected identifier before '&' token
    7 |   scanf("%d %d %d %d",&a,&b.&c,&d);
      |                             ^
Language: C++

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

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;

    int e[4] = {a*c, a*d, b*c, b*d};
    cout << max(e) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:16: error: no matching function for call to 'max(int [4])'
    9 |     cout << max(e) << endl;
      |             ~~~^~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:9:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int*'
    9 |     cout << max(e) << endl;
      |             ~~~^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  long long a,b,c,d,ans1,ans2,ans3,ans4;
  cin >> a >> b >> c >> d;
  ans1 = a*c;
  ans2 = b*d;
  ans3 = a*d;
  ans4 = b*c;
  cout << max(max(ans1,ans2),max(ans3,ans4)) << endl; 
  return 0;

Compiler output:
a.cc: In function 'int main()':
a.cc:12:12: error: expected '}' at end of input
   12 |   return 0;
      |            ^
a.cc:4:12: note: to match this '{'
    4 | int main() {
      |            ^
Language: Java

import java.util.Scanner;

public class Main {
  
  public static void main(String[] args) {
    int num[] = new int[4]; 
    Scanner scanner = new Scanner(System.in);
    for (int i = 0; i < 4; i++){
        num[i] = Integer.parseInt(scanner.next());
    }
    scanner.close();
    long max = -1000000000000000000;
    long tmp = 0;

    for (int j = 0; j < 2; j++){
      for (int k = 2; k < 4; k++){
        tmp = (long)num[j] * (long)num[k];
        System.out.println(num[j] +":"+ +num[k]);
        System.out.println(tmp);
        if (max < tmp){
          max = tmp;
        }
      }
    }
    System.out.println(max);
  }
}

Compiler output:
Main.java:12: error: integer number too large
    long max = -1000000000000000000;
                ^
1 error
Language: C++

#include<iostream>
#include<math.h>
using namespace std;
int main()
{
  long long int a,b,c,d;
  cin>>a>>b>>c>>d;
  long long int x,y;
  x=mx(a,b);
  y=max(c,d);
  cout<<x*y;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:5: error: 'mx' was not declared in this scope; did you mean 'x'?
    9 |   x=mx(a,b);
      |     ^~
      |     x
Language: C++

x = [int(i) for i in input().split()]

a = [x[0]* x[2],x[0]* x[3],x[1]* x[2],x[1]* x[3]]
             
print(max(a))


Compiler output:
a.cc:1:1: error: 'x' does not name a type
    1 | x = [int(i) for i in input().split()]
      | ^
Language: C++

#include<iostream>
using namespace std;
typedef long long ll;
#define max(a,b) ((a)>(b)?(a):(b))
void main()
{
	int a,b,c,d;
	cin>>a>>b>>c>>d;
	cout<<max((ll)a*d,max((ll)a*c,max((ll)b*c,(ll)b*d)));
}

Compiler output:
a.cc:5:1: error: '::main' must return 'int'
    5 | void main()
      | ^~~~
Language: C++

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

int main() {
  int a, b, c, d, e, j, k;
  cin >> a >> b >> c >> d;
  e=a*b;




  j=c*d;
k=max(max(max(max(max(j, i), h), g), f), e);
    cout << k << endl;
                }

Compiler output:
a.cc: In function 'int main()':
a.cc:13:26: error: 'i' was not declared in this scope
   13 | k=max(max(max(max(max(j, i), h), g), f), e);
      |                          ^
a.cc:13:30: error: 'h' was not declared in this scope
   13 | k=max(max(max(max(max(j, i), h), g), f), e);
      |                              ^
a.cc:13:34: error: 'g' was not declared in this scope
   13 | k=max(max(max(max(max(j, i), h), g), f), e);
      |                                  ^
a.cc:13:38: error: 'f' was not declared in this scope
   13 | k=max(max(max(max(max(j, i), h), g), f), e);
      |                                      ^
Language: C++

#include<iostream>
#include<cstdio>
#include<cmath>
#include<algorithm>
using namespace std;
int main(){
  int a, b, c, d, ans;
  cin >> a >> b >> c >> d;
  ans = max(a*c, a*d, b*c, b*d);
  cout << ans << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:12: error: no matching function for call to 'max(int, int, int, int)'
    9 |   ans = max(a*c, a*d, b*c, b*d);
      |         ~~~^~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 4 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 4 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:4:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 4 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 4 provided
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll,ll> pi;
typedef complex <double> cp;
#define debug(a) cout<<#a<<":"<<a<<endl;
#define fr freopen("in.txt","r",stdin);
#define Fill(x,a) memset(x,a,sizeof(x))
#define cpy(a,b) memcpy(a,b,sizeof(a))
const double PI = acos(-1);
const ll INF=0x3f3f3f3f3f3f3f3f;
const ll N=1e6+7;
const ll mod=1e9+7;
ll maxn,minn;
ll T,n,m,q;
ll a,b,c,d;
ll arr[10];

int main(){
	cin >> arr[1] >> arr[2] >> arr[3] >> arr[4];
	ll ans = -INF
	for(ll i = 1; i <= 2; i ++ ){
		for(ll j = 3; j <= 4; j++ ){
			ans = max(ans,arr[i] * arr[j]);
		}
	}
	cout << ans << endl;
	
	
	return 0;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:22:9: error: expected ',' or ';' before 'for'
   22 |         for(ll i = 1; i <= 2; i ++ ){
      |         ^~~
a.cc:22:23: error: 'i' was not declared in this scope
   22 |         for(ll i = 1; i <= 2; i ++ ){
      |                       ^
Language: C++

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
int main(){
 ll a,b,c,d;
  cin>>a>>b>>c>>d;
  ll mp = 0;
  if(a>=0){
    mp = max(b*d, a*d);
  }else if( b > 0 and d < 0){
    mp = *max_element(vector<ll>{b*d, 0, a*c});
  }else if(b<=0){
    mp = max(a*c, b*c);
  }
  cout<<mp<<endl; 
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:11:22: error: no matching function for call to 'max_element(std::vector<long long int>)'
   11 |     mp = *max_element(vector<ll>{b*d, 0, a*c});
      |           ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h:5641:5: note: candidate: 'template<class _FIter> constexpr _FIter std::max_element(_FIter, _FIter)'
 5641 |     max_element(_ForwardIterator __first, _ForwardIterator __last)
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5641:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algo.h:5666:5: note: candidate: 'template<class _FIter, class _Compare> constexpr _FIter std::max_element(_FIter, _FIter, _Compare)'
 5666 |     max_element(_ForwardIterator __first, _ForwardIterator __last,
      |     ^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5666:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:86:
/usr/include/c++/14/pstl/glue_algorithm_defs.h:524:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator, class _Compare> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::max_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator, _Compare)'
  524 | max_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last, _Compare __comp);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:524:1: note:   candidate expects 4 arguments, 1 provided
/usr/include/c++/14/pstl/glue_algorithm_defs.h:528:1: note: candidate: 'template<class _ExecutionPolicy, class _ForwardIterator> __pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator> std::max_element(_ExecutionPolicy&&, _ForwardIterator, _ForwardIterator)'
  528 | max_element(_ExecutionPolicy&& __exec, _ForwardIterator __first, _ForwardIterator __last);
      | ^~~~~~~~~~~
/usr/include/c++/14/pstl/glue_algorithm_defs.h:528:1: note:   candidate expects 3 arguments, 1 provided
Language: C++

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

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;

    int e[4] = [a*c, a*d, b*c, b*d];
    cout << max(e) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:18: error: expected ',' before '*' token
    8 |     int e[4] = [a*c, a*d, b*c, b*d];
      |                  ^
      |                  ,
a.cc:8:18: error: expected identifier before '*' token
a.cc:8:20: error: expected ']' before ',' token
    8 |     int e[4] = [a*c, a*d, b*c, b*d];
      |                    ^
      |                    ]
a.cc: In lambda function:
a.cc:8:20: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:8:16: error: array must be initialized with a brace-enclosed initializer
    8 |     int e[4] = [a*c, a*d, b*c, b*d];
      |                ^~~~
a.cc:8:23: error: expected initializer before '*' token
    8 |     int e[4] = [a*c, a*d, b*c, b*d];
      |                       ^
a.cc:9:16: error: no matching function for call to 'max(int [4])'
    9 |     cout << max(e) << endl;
      |             ~~~^~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:9:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int*'
    9 |     cout << max(e) << endl;
      |             ~~~^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

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

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;

    int d[4] = [a*c, a*d, b*c, b*d];
    cout << max(d) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: conflicting declaration 'int d [4]'
    8 |     int d[4] = [a*c, a*d, b*c, b*d];
      |         ^
a.cc:5:18: note: previous declaration as 'int d'
    5 |     int a, b, c, d;
      |                  ^
a.cc:8:18: error: expected ',' before '*' token
    8 |     int d[4] = [a*c, a*d, b*c, b*d];
      |                  ^
      |                  ,
a.cc:8:18: error: expected identifier before '*' token
a.cc:8:20: error: expected ']' before ',' token
    8 |     int d[4] = [a*c, a*d, b*c, b*d];
      |                    ^
      |                    ]
a.cc: In lambda function:
a.cc:8:20: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:8:23: error: expected initializer before '*' token
    8 |     int d[4] = [a*c, a*d, b*c, b*d];
      |                       ^
a.cc:9:16: error: no matching function for call to 'max(int&)'
    9 |     cout << max(d) << endl;
      |             ~~~^~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:9:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
    9 |     cout << max(d) << endl;
      |             ~~~^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
Language: C++

#inc1lud1e<b1its/std1c1++.h>
using na1mespa1c1e std1;
int ma1in()
{
	long long int a1,b1,c1,d1,p,q;
	c1in>>a1>>b1>>c1>>d1;
	if(a1*c1>a1*d1)
	{
		p=a1*c1;
	}
	else
	{
		p=a1*d1;
	}
	if(b1*c1>b1*d1)
	{
		q=b1*c1;
	}
	else
	{
		q=b1*d1;
	}
	if(p>q)
	{
		c1out<<p<<end1l;
	}
	else
	{
		c1out<<q<<end1l;
	}
}

Compiler output:
a.cc:1:2: error: invalid preprocessing directive #inc1lud1e; did you mean #include?
    1 | #inc1lud1e<b1its/std1c1++.h>
      |  ^~~~~~~~~
      |  include
a.cc:2:7: error: expected nested-name-specifier before 'na1mespa1c1e'
    2 | using na1mespa1c1e std1;
      |       ^~~~~~~~~~~~
a.cc: In function 'int ma1in()':
a.cc:6:9: error: 'c1in' was not declared in this scope; did you mean 'c1'?
    6 |         c1in>>a1>>b1>>c1>>d1;
      |         ^~~~
      |         c1
a.cc:25:17: error: 'c1out' was not declared in this scope
   25 |                 c1out<<p<<end1l;
      |                 ^~~~~
a.cc:25:27: error: 'end1l' was not declared in this scope
   25 |                 c1out<<p<<end1l;
      |                           ^~~~~
a.cc:29:17: error: 'c1out' was not declared in this scope
   29 |                 c1out<<q<<end1l;
      |                 ^~~~~
a.cc:29:27: error: 'end1l' was not declared in this scope
   29 |                 c1out<<q<<end1l;
      |                           ^~~~~
a.cc:31:1: warning: no return statement in function returning non-void [-Wreturn-type]
   31 | }
      | ^
Language: C++

#include <iostream>

using namespace std;

int main()
{
    long long a, b, c, d, max = -1e9;
    long long i, j, tmp = 0;
    cin >> a >> b >> c >> d;
    if (abs(a) > abs(b) && abs(c) > abs(d))
    {
        max = a * c;
    }
    else
    {
        for (i = a; i <= b; i++)
        {
            for (j = c; j <= d; j++)
            {
                tmp = i * j;
                if (tmp >= max)
                {
                    max = tmp;
                }
            }
        }
    }

Compiler output:
a.cc: In function 'int main()':
a.cc:27:6: error: expected '}' at end of input
   27 |     }
      |      ^
a.cc:6:1: note: to match this '{'
    6 | {
      | ^
Language: C++

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

int main() {
    int a, b, c, d;
    cin >> a >> b >> c >> d;

    int a[4] = [a*c, a*d, b*c, b*d];
    cout << max(a) << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:9: error: conflicting declaration 'int a [4]'
    8 |     int a[4] = [a*c, a*d, b*c, b*d];
      |         ^
a.cc:5:9: note: previous declaration as 'int a'
    5 |     int a, b, c, d;
      |         ^
a.cc:8:18: error: expected ',' before '*' token
    8 |     int a[4] = [a*c, a*d, b*c, b*d];
      |                  ^
      |                  ,
a.cc:8:18: error: expected identifier before '*' token
a.cc:8:20: error: expected ']' before ',' token
    8 |     int a[4] = [a*c, a*d, b*c, b*d];
      |                    ^
      |                    ]
a.cc: In lambda function:
a.cc:8:20: error: expected '{' before ',' token
a.cc: In function 'int main()':
a.cc:8:23: error: expected initializer before '*' token
    8 |     int a[4] = [a*c, a*d, b*c, b*d];
      |                       ^
a.cc:9:16: error: no matching function for call to 'max(int&)'
    9 |     cout << max(a) << endl;
      |             ~~~^~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:9:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
    9 |     cout << max(a) << endl;
      |             ~~~^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided