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

import math
a,b= input().split();
a = int(a);
b = float(b);
# b = float(input())
print(math.floor(a*b))

Compiler output:
a.cc:5:3: error: invalid preprocessing directive #b
    5 | # b = float(input())
      |   ^
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'
a.cc:3:1: error: 'a' does not name a type
    3 | a = int(a);
      | ^
a.cc:4:1: error: 'b' does not name a type
    4 | b = float(b);
      | ^
a.cc:6:6: error: expected constructor, destructor, or type conversion before '(' token
    6 | print(math.floor(a*b))
      |      ^
Language: C++

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

int main() {
  
  int64_t A;
 double B;
 int_64t x==A*B;
 
 
  cout <<  (int)x << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:2: error: 'int_64t' was not declared in this scope; did you mean 'int64_t'?
    9 |  int_64t x==A*B;
      |  ^~~~~~~
      |  int64_t
a.cc:12:17: error: 'x' was not declared in this scope
   12 |   cout <<  (int)x << endl;
      |                 ^
Language: C++

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

int main() {
  double A;
  double B;
  cin >> A;
  cin >> B;
  ll ans;
  ans = double floor(A*B);
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:9: error: expected primary-expression before 'double'
   12 |   ans = double floor(A*B);
      |         ^~~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
void print_int(int x) {
  cout << "x = " << x << endl;
}
 
int main() {
  
  int64_t A;
 double B;
 int_64t x==A*B
 
 
  cout <<  (int)x << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:2: error: 'int_64t' was not declared in this scope; did you mean 'int64_t'?
   12 |  int_64t x==A*B
      |  ^~~~~~~
      |  int64_t
Language: C++

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

int main(){
  unsigned long long a;
  double b;
  cin >> a >> b;
  int f = b * 100
  unsigned long long ans = a * b;
  int h = ans % 100;
  ans = ans - h;
  ans = ans / 100;
  cout << ans << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: expected ',' or ';' before 'unsigned'
    9 |   unsigned long long ans = a * b;
      |   ^~~~~~~~
a.cc:10:11: error: 'ans' was not declared in this scope; did you mean 'abs'?
   10 |   int h = ans % 100;
      |           ^~~
      |           abs
Language: C++

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

int main() {
  long long A; double B; cin >> A >> B;
  int B100 = B*100;
  long long ans = A*B100
  ans /= 100;
  cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:3: error: expected ',' or ';' before 'ans'
    9 |   ans /= 100;
      |   ^~~
Language: Java

import java.util.Scanner;

public class JavaFloatIntExample2 {

        public static void main(String[] args) {
            Scanner sc = new Scanner(System.in);
            System.out.print("");
            int A = sc.nextInt();
            float B = sc.nextFloat();
            sc.close();
            float product = A*B;
            System.out.println((int)product);
        }
}


Compiler output:
Main.java:3: error: class JavaFloatIntExample2 is public, should be declared in a file named JavaFloatIntExample2.java
public class JavaFloatIntExample2 {
       ^
1 error
Language: C++

#include<iostream>
#include<math.h>
int main()
{
  long long int a;
  double b;
  cin>>a >> b;
  cout<<trunc(a*b);
  
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 |   cin>>a >> b;
      |   ^~~
      |   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:8:3: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
    8 |   cout<<trunc(a*b);
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C

#include<stdio.h>

int main()
{
	long long A;
	double	B;
	 long long C;
	scanf_s("%lld",&A);
	scanf_s("%le",&B);
	C = A * B;
	printf("%lld", ( long long)C);
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:8:9: error: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
    8 |         scanf_s("%lld",&A);
      |         ^~~~~~~
      |         scanf
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 A;
  double B;
  cin >> A >> B;
  
  double C =A*B;
    
  cout << (long long)C <<endl;
  
  reyurn 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:15:3: error: 'reyurn' was not declared in this scope
   15 |   reyurn 0;
      |   ^~~~~~
Language: C++

#include <iostream>
using namespace std;

int main() {
    double A, B, ans;
    cin >> A >> B;
    ans = floor(A * B);
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: 'floor' was not declared in this scope
    7 |     ans = floor(A * B);
      |           ^~~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
#define ll long long
#define dd double
#define MOD1 1000000007
#define MOD2 998244353
#define nl cout<<endl
#define rt ll Q[100005]={0}
#define mp make_pair
#define test() ll t;cin>>t;while(t--)
#define pb push_back
#define ff first    
#define ss second
#define all(v) v.begin(),v.end()
#define s(ar,n) sort(ar,ar+n)
#define rs(ar,n) sort(ar, ar+n, greater<ll>()) 
#define oa(a,n) for(ll i=0;i<n;i++)cout<<a[i]<<" ";nl
#define cn(a,n) for(ll i=0;i<n;i++)cin>>a[i];
#define ov(a,n) for(ll i=n-1;i>=0;i--)cout<<a[i]<<" ";nl
#define ovp(a,n) for(ll i=0;i<n;i++)cout<<a[i].ff<<" "<<a[i].ss<<endl;
#define maxa(ar,N) *max_element(ar,ar+N)
#define mina(ar,N) *min_element(ar,ar+N)
#define fastio() ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
typedef pair<ll,ll> pii;
ll powe(ll n,ll m){if(m==0)return 1;ll t=powe(n,m/2);if(m%2==0)return (t*t);return (((t*t))*n);}
ll mpowe(ll n,ll m,ll MOD){if(m==0)return 1;ll t=mpowe(n,m/2,MOD);t%=MOD;if(m%2==0)return (t*t)%MOD;return (((t*t)%MOD)*n)%MOD;}
ll logtwo(ll n){if(n==1)return 0;if(n==0) return -1;return logtwo(n/2)+1;}
ll dig(ll n)
{
	ll c=0;
	while(n>0)
	{
		n=n/10;
		c++;
	}
	return c-1;
}
int main()
{
    fastio();
  	io
    double a,b;
    cin>>a>>b;
    ll b1 = (ll)b;
    ll b2 = (b-b1)*100;
    ll ans = a*b1 + (a*b2)/100;
    cout<<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:43:9: error: 'io' was not declared in this scope
   43 |         io
      |         ^~
a.cc:45:10: error: 'a' was not declared in this scope
   45 |     cin>>a>>b;
      |          ^
a.cc:45:13: error: 'b' was not declared in this scope
   45 |     cin>>a>>b;
      |             ^
Language: C++

#include <iostream>
using namespace std;

int main()
{
  long double a, b;
  cin>>a>>b;
  
  long long int = a*b;
  cout<<pro;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:17: error: expected unqualified-id before '=' token
    9 |   long long int = a*b;
      |                 ^
a.cc:10:9: error: 'pro' was not declared in this scope
   10 |   cout<<pro;
      |         ^~~
Language: Java

import java.util.*;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		long a = sc.nextLong();
		double b = sc.nextDouble();
		
		BigDecimal bd1 = new BigDecimal(a);
		BigDecimal bd2 = new BigDecimal(b);
		BigDecimal total = bd1.multiply(bd2);
		
		BigDecimal bd = total.setScale(0, BigDecimal.ROUND_DOWN);
		
		System.out.println(bd);
	}

}

Compiler output:
Main.java:11: error: cannot find symbol
		BigDecimal bd1 = new BigDecimal(a);
		^
  symbol:   class BigDecimal
  location: class Main
Main.java:11: error: cannot find symbol
		BigDecimal bd1 = new BigDecimal(a);
		                     ^
  symbol:   class BigDecimal
  location: class Main
Main.java:12: error: cannot find symbol
		BigDecimal bd2 = new BigDecimal(b);
		^
  symbol:   class BigDecimal
  location: class Main
Main.java:12: error: cannot find symbol
		BigDecimal bd2 = new BigDecimal(b);
		                     ^
  symbol:   class BigDecimal
  location: class Main
Main.java:13: error: cannot find symbol
		BigDecimal total = bd1.multiply(bd2);
		^
  symbol:   class BigDecimal
  location: class Main
Main.java:15: error: cannot find symbol
		BigDecimal bd = total.setScale(0, BigDecimal.ROUND_DOWN);
		^
  symbol:   class BigDecimal
  location: class Main
Main.java:15: error: cannot find symbol
		BigDecimal bd = total.setScale(0, BigDecimal.ROUND_DOWN);
		                                  ^
  symbol:   variable BigDecimal
  location: class Main
7 errors
Language: C

#include<bits/stdc++.h>
using namespace std;
int main(void){
    long a;
    double b;
    cin >> a >> b;
    cout << long(double(a) * b) << endl;
    return 0;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

using namespace std;
using ll = long long;
using P = pair<int,int>;
using Graph = vector<vector<int>>;

int main(void) {
    ll a;
    double b;
    cin >> a >> b;

    ll b_int = b;
    double b_double = b - b_int;

    ll ans = a * b;
    cout << ans << endl;

    return 0;


Compiler output:
a.cc: In function 'int main()':
a.cc:23:14: error: expected '}' at end of input
   23 |     return 0;
      |              ^
a.cc:12:16: note: to match this '{'
   12 | int main(void) {
      |                ^
Language: C

#include <stdio.h>
int main(void){

	int a;
	int b;
	double c;

	scanf("%d", &a);
	scanf("%lf", &c);

	(int)b = a * c;
	printf("%d", b);
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:16: error: lvalue required as left operand of assignment
   11 |         (int)b = a * c;
      |                ^
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 A;
  double B;
  cin >> A >> B;
  
  long long C =A*B*100
  long long D =C/100
    
  cout << D <<endl;
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: expected ',' or ';' before 'long'
   12 |   long long D =C/100
      |   ^~~~
Language: C

#include <stdio.h>
int main(void){

	int a;
	int b;
	double c;

	scanf("%d", &a);
	scanf("%lf", &c);

	(int)b = floor(a * c);
	printf("%d", b);
	
	return 0;
}

Compiler output:
main.c: In function 'main':
main.c:11:18: error: implicit declaration of function 'floor' [-Wimplicit-function-declaration]
   11 |         (int)b = floor(a * c);
      |                  ^~~~~
main.c:2:1: note: include '<math.h>' or provide a declaration of 'floor'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | int main(void){
main.c:11:18: warning: incompatible implicit declaration of built-in function 'floor' [-Wbuiltin-declaration-mismatch]
   11 |         (int)b = floor(a * c);
      |                  ^~~~~
main.c:11:18: note: include '<math.h>' or provide a declaration of 'floor'
main.c:11:16: error: lvalue required as left operand of assignment
   11 |         (int)b = floor(a * c);
      |                ^
Language: C++

#include <iostream>
using namespace std;

int main(){
  int a;
  float b;
　cin >> a >> b;
  cout <<  a*b / 100 * 100;

}


Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　cin >> a >> b;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: '\U00003000cin' was not declared in this scope
    7 | 　cin >> a >> b;
      | ^~~~~
Language: C++

#include <iostream>
using namespace std;

int main(){
  int a, c;
  float b;
　cin >> a >> b;
  cout <<  a*b / 100 * 100;

}


Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　cin >> a >> b;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: '\U00003000cin' was not declared in this scope
    7 | 　cin >> a >> b;
      | ^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main() {
  long long a;
  long long double b;
  cin >> a >> b;
  cout << a * b;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:8: error: 'long long' specified with 'double'
    5 |   long long double b;
      |        ^~~~
Language: C++

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

int main() {
    int a ;
  double b;
  double c;
  cin>>a>>b;
  c=floor(a*b)
  cout<<c<<endl;
    return (0);
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: expected ';' before 'cout'
   10 |   c=floor(a*b)
      |               ^
      |               ;
   11 |   cout<<c<<endl;
      |   ~~~~
Language: C

def main():
    a, b = map(float, input().split())
    b *= 100 
    print((int(a * b /100)))
        
    
if __name__ == '__main__':
    main()

Compiler output:
main.c:1:1: error: unknown type name 'def'
    1 | def main():
      | ^~~
main.c: In function 'main':
main.c:1:11: error: expected declaration specifiers before ':' token
    1 | def main():
      |           ^
main.c:7:16: warning: multi-character literal with 8 characters exceeds 'int' size of 4 bytes
    7 | if __name__ == '__main__':
      |                ^~~~~~~~~~
Language: C

#include<iostream>
using namespace std;
int main()
{
	long double a;
	double b;
	cin>>a>>b;
	long double yo = a*b;
	long long int o = (long long int) yo;
	printf("%lld",o);
	return 0;
}

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

#include <iostream>
using namespace std;

int main(){
  int a, c;
  float b
　cin >> a >> b;
  cout <<  a*b / 100 * 100;

}

Compiler output:
a.cc:7:1: error: extended character 　 is not valid in an identifier
    7 | 　cin >> a >> b;
      | ^
a.cc: In function 'int main()':
a.cc:7:1: error: expected initializer before '\U00003000cin'
    7 | 　cin >> a >> b;
      | ^~~~~
a.cc:8:14: error: 'b' was not declared in this scope
    8 |   cout <<  a*b / 100 * 100;
      |              ^
Language: C++

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        long a = sc.nextLong();
        double b = sc.nextDouble();
        String result = String.valueOf(Math.floor(a * b));
        System.out.println(result.replace(".0",""));
    }
}


Compiler output:
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.*;
      | ^~~~~~
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()
{
	unsigned long a;
  	unsigned double b,c;
  cin>>a>>b;
  c=a*b;
  cout<<(unsigned long)c;
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:6:9: error: 'unsigned' specified with 'double'
    6 |         unsigned double b,c;
      |         ^~~~~~~~
a.cc:6:9: error: 'unsigned' specified with 'double'
Language: C++

#include <iostream>
#include <vector>
using namespace std;
 
int main(){
  
	long long int a,ans;
  float int b;
	cin >> a >> b;
  ans = a*b;
  	cout << ans; 
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: two or more data types in declaration of 'b'
    8 |   float int b;
      |   ^~~~~
a.cc:9:21: error: 'b' was not declared in this scope
    9 |         cin >> a >> b;
      |                     ^
Language: C++

#include <iostream>
#include <math.h>

using namespace std;

int main() {
  double A, B;
  cin>>A>>B;
  cout<<long(fool(A*B))<<endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:14: error: 'fool' was not declared in this scope; did you mean 'bool'?
    9 |   cout<<long(fool(A*B))<<endl;
      |              ^~~~
      |              bool
Language: C

#include<iostream>

using namespace std;
int main()
{
	long double a;
	double b;
	cin>>a>>b;
	long double res = a*b;
	long long int fin = (long long int) res;
	printf("%lld",fin);
	return 0;
}

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

#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
using namespace std;
#define ll long long 
#define ld double 
#define  pb push_back
#define  ff(n) for(i=0; i<n; i++)
#define mo 10000
ll max(ll a,ll b){return (a>b)?a:b;}
int main()
{
    ll n,m=0,i,x,y,k=0,j;
    cin>>n;
    int128_t k1=1;
    double p;
    cin>>p;
    k1=p*n;
    cout<<k1<<endl;
    
}


Compiler output:
a.cc:2:10: fatal error: boost/multiprecision/cpp_int.hpp: No such file or directory
    2 | #include <boost/multiprecision/cpp_int.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
  long long A;
  long float B;
  cin >> A >> B;
  cout << (long long)((A * (long long)(B * 100)) / 100) << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'long' specified with 'float'
    8 |   long float B;
      |   ^~~~
Language: C++

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

int main() {
    double a, b;
    cin >> a >> b;
    ll c = a * b;
    cout << c << endl;
    return 0;
}


Compiler output:
a.cc:14:1: error: stray '\16' in program
   14 | <U+000E>
      | ^~~~~~~~
Language: C

#include<stdio.h>

int main(void){
    long long int A,BB;
    scanf("%lld %lf",&A,&B);
    BB=(long long int)(B*100);
    long long int ans=(long long int)(A*BB);
    printf("%lld\n",ans/100);
    return 0;
}

Compiler output:
main.c: In function 'main':
main.c:5:26: error: 'B' undeclared (first use in this function); did you mean 'BB'?
    5 |     scanf("%lld %lf",&A,&B);
      |                          ^
      |                          BB
main.c:5:26: note: each undeclared identifier is reported only once for each function it appears in
Language: C++

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

int main() {
  long long a;
  cin >> a;
  long long double b;
  cin >> b;
  long long double ans;
  long long ANS;
  ans = a*b;
  ANS = ans;
  cout << ANS << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:7:8: error: 'long long' specified with 'double'
    7 |   long long double b;
      |        ^~~~
a.cc:9:8: error: 'long long' specified with 'double'
    9 |   long long double ans;
      |        ^~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  double a,b;
  cin>>a>>b;
  　double sum=a*b;
  long long ans=sum;
  cout<<ans<<endl;
  
}




Compiler output:
a.cc:6:3: error: extended character 　 is not valid in an identifier
    6 |   　double sum=a*b;
      |   ^
a.cc: In function 'int main()':
a.cc:6:3: error: '\U00003000double' was not declared in this scope; did you mean 'double'?
    6 |   　double sum=a*b;
      |   ^~~~~~~~
      |   double
a.cc:7:17: error: 'sum' was not declared in this scope
    7 |   long long ans=sum;
      |                 ^~~
Language: C++

#include <iostream>

using namespace std;

int main() {
    unsigned long long a;
    double b;
    cin >> a >> b;
    unsigned long long c = unsigned long long(b * 100);
    cout << a * c / 100 << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:28: error: expected primary-expression before 'unsigned'
    9 |     unsigned long long c = unsigned long long(b * 100);
      |                            ^~~~~~~~
Language: C++

#include <iostream>
#include <cmath>

using namespace std;


int main(){

int a;
int b;
cin >> a >> b;
double float rs=0;
rs=floor(a*b);
cout << (long long) (rs);
return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:1: error: two or more data types in declaration of 'rs'
   12 | double float rs=0;
      | ^~~~~~
a.cc:13:1: error: 'rs' was not declared in this scope
   13 | rs=floor(a*b);
      | ^~
Language: Java

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

public class main {

    public static void main(String[] args) {
        Scanner p=new Scanner(System.in);
        long x=p.nextLong();
        double d=p.nextDouble();
        double j=(double)x*d;
        long y=(long)j;
        System.out.println(y);;
    }
}

Compiler output:
Main.java:4: error: class main is public, should be declared in a file named main.java
public class main {
       ^
1 error
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    long a;
    float b;
    long c;
    cin >> a >> b;
    (long)c = a * b;
    cout << c << endl;
    return 0;    
} 

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: lvalue required as left operand of assignment
    8 |     (long)c = a * b;
      |     ^~~~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
	unsigned long a;
  	float b,c;
  cin>>a>>b;
  c=a*b;
  cout<<unsigned long(c);
}
  

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: expected primary-expression before 'unsigned'
    9 |   cout<<unsigned long(c);
      |         ^~~~~~~~
Language: C++

#include <iostream>
#include <cmath>

using namespace std;


int main(){

int a;
int b;
cin >> a >> b;
double float rs=0;
rs=floor(a*b)
cout << (long long) (rs);

}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:1: error: two or more data types in declaration of 'rs'
   12 | double float rs=0;
      | ^~~~~~
a.cc:13:1: error: 'rs' was not declared in this scope
   13 | rs=floor(a*b)
      | ^~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main()
{
  long long a;
  double b;
  scanf("%lld %lf,&a,&b);
  long long t = (long long)(b*100);
  long long ans = a*t;
  ans = ans / 100;
  printf("%lld\n",ans);
  return 0; 
}


Compiler output:
a.cc:7:9: warning: missing terminating " character
    7 |   scanf("%lld %lf,&a,&b);
      |         ^
a.cc:7:9: error: missing terminating " character
    7 |   scanf("%lld %lf,&a,&b);
      |         ^~~~~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:8:3: error: expected primary-expression before 'long'
    8 |   long long t = (long long)(b*100);
      |   ^~~~
a.cc:9:21: error: 't' was not declared in this scope
    9 |   long long ans = a*t;
      |                     ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int a, b;
      double x;
  scanf("%d %lf",&a,%x);
  b = a*x;
  cout << b << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:21: error: expected primary-expression before '%' token
    6 |   scanf("%d %lf",&a,%x);
      |                     ^
Language: Java

import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    long a = sc.nextLong();
    double b = sc.nextDouble();
    long x = b.longValue();
    long res = a*x;
    System.out.println(res);
  }
}

Compiler output:
Main.java:7: error: double cannot be dereferenced
    long x = b.longValue();
              ^
1 error
Language: C++

#include <iostream>
#include <math>

using namespace std;


int main(){

int a;
int b;
cin >> a >> b;
double float rs=0;
rs=floor(a*b)
cout << (long long) (rs);

}

Compiler output:
a.cc:2:10: fatal error: math: No such file or directory
    2 | #include <math>
      |          ^~~~~~
compilation terminated.
Language: C++

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

int main(){
  long long a;
  float b;
  cin >> a >> b;
  long float l=a*b;
  long long k=l;
  cout << k << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'long' specified with 'float'
    8 |   long float l=a*b;
      |   ^~~~
Language: C++

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

int main(){
  int m;
  double a, b;
  cin >> a >> b;
  m = a*b
  cout << m << endl; 

}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:10: error: expected ';' before 'cout'
    8 |   m = a*b
      |          ^
      |          ;
    9 |   cout << m << endl;
      |   ~~~~
Language: C++

#include<iostream>
using namespace std;
int main()
{
    double i,ii;
  cin >> i >> ii;
  cout << floor(i * ii);
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:11: error: 'floor' was not declared in this scope
    7 |   cout << floor(i * ii);
      |           ^~~~~
Language: C++

#include <bits/stdc++.h>

using namespace std;

using ll = long long;

const long long MOD_NUMBER = 1000000007;
const double PI = 3.14159265358979323846;

int main() {
  ll a, b2;
  bouble b;
  cin >> a >> b;
  b2 = b * 100;
  a *= b2;
  a /= 100;
  cout << a << endl;
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:3: error: 'bouble' was not declared in this scope; did you mean 'double'?
   12 |   bouble b;
      |   ^~~~~~
      |   double
a.cc:13:15: error: 'b' was not declared in this scope; did you mean 'b2'?
   13 |   cin >> a >> b;
      |               ^
      |               b2
Language: C++

#include <bits/stdc++.h>
using namespace std;
int main(){
    int a, b;]
      double x;
  cin >> a >> x;
  b = a*x;
  cout << b << endl;
  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:14: error: expected primary-expression before ']' token
    4 |     int a, b;]
      |              ^
a.cc:6:15: error: 'x' was not declared in this scope
    6 |   cin >> a >> x;
      |               ^
Language: C++

#include <iostream>
#include <math>

using namespace std;


int main(){

int a;
int b;
cin >> a >> b;
long double rs=0;
rs=floor(a*b)
cout << (long long) (rs);

}

Compiler output:
a.cc:2:10: fatal error: math: No such file or directory
    2 | #include <math>
      |          ^~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mp make_pair
#define INF 0x3f3f3f3f
#define fast_cin()                    
    ios_base::sync_with_stdio(false); 
    cin.tie(NULL)
#define ll long long int
#define pi 3.141592653589792
int main()
{
    ll a;
    double b;
    cin>>a>>b;
    cout<<a*b;
    return 0;
}

Compiler output:
a.cc:8:30: error: expected constructor, destructor, or type conversion before '(' token
    8 |     ios_base::sync_with_stdio(false);
      |                              ^
a.cc:9:5: error: 'cin' does not name a type
    9 |     cin.tie(NULL)
      |     ^~~
Language: C++

#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
namespace mp = boost::multiprecision;
// 任意長整数型
using Real = mp::cpp_int;
// 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)
using Real = mp::number<mp::cpp_dec_float<1024>>;
Bint A;
Real B;

int main() {
  cin >> A >> B;
  cout << (unsigned long long)(A * B) << endl;
  return 0;
}


Compiler output:
a.cc:2:10: fatal error: boost/multiprecision/cpp_dec_float.hpp: No such file or directory
    2 | #include <boost/multiprecision/cpp_dec_float.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
  
  int A;
  double B;
  
  cin >> A;
  cin >> B;
  
  cout << (int) A * B  endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:12:22: error: expected ';' before 'endl'
   12 |   cout << (int) A * B  endl;
      |                      ^ ~~~~
      |                      ;
Language: C++

#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_dec_float.hpp>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
namespace mp = boost::multiprecision;
// 任意長整数型
using Bint = mp::cpp_int;
// 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)
using Real = mp::number<mp::cpp_dec_float<1024>>;
Bint A;
Real B;

int main() {
  cin >> A >> B;
  cout << (unsigned long long)(A * B) << endl;
  return 0;
}


Compiler output:
a.cc:2:10: fatal error: boost/multiprecision/cpp_dec_float.hpp: No such file or directory
    2 | #include <boost/multiprecision/cpp_dec_float.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

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

int main() {
  long long A;
  double B;
  cin >>A>>B;
  ans=A*B/1;
  cout <<ans<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:3: error: 'ans' was not declared in this scope; did you mean 'abs'?
    8 |   ans=A*B/1;
      |   ^~~
      |   abs
Language: C++

#include <bits/stdc++.h>
using namespace std;
namespace mp = boost::multiprecision;
// 任意長整数型
using Bint = mp::cpp_int;
// 仮数部が1024ビットの浮動小数点数型(TLEしたら小さくする)
using Real = mp::number<mp::cpp_dec_float<1024>>;
Bint A;
Real B;

int main() {
  cin >> A >> B;
  cout << (unsigned long long)(A * B) << endl;
  return 0;
}


Compiler output:
a.cc:3:16: error: 'boost' has not been declared
    3 | namespace mp = boost::multiprecision;
      |                ^~~~~
a.cc:3:23: error: 'multiprecision' is not a namespace-name
    3 | namespace mp = boost::multiprecision;
      |                       ^~~~~~~~~~~~~~
a.cc:5:14: error: 'mp' does not name a type
    5 | using Bint = mp::cpp_int;
      |              ^~
a.cc:7:14: error: 'mp' does not name a type
    7 | using Real = mp::number<mp::cpp_dec_float<1024>>;
      |              ^~
a.cc:8:1: error: 'Bint' does not name a type; did you mean 'uint'?
    8 | Bint A;
      | ^~~~
      | uint
a.cc:9:1: error: 'Real' does not name a type
    9 | Real B;
      | ^~~~
a.cc: In function 'int main()':
a.cc:12:10: error: 'A' was not declared in this scope
   12 |   cin >> A >> B;
      |          ^
a.cc:12:15: error: 'B' was not declared in this scope
   12 |   cin >> A >> B;
      |               ^
Language: C

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

int main(void) {
	int a;
	double b;
	
	if (scanf("%d", &a) < 0) {
		exit(1);
	}
	if (scanf("%lf", &b) < 0) {
		exit(1);
	}
	
	int c;
	c = (int)(double(a) * b);
	printf("%d\n", c);
}

Compiler output:
main.c: In function 'main':
main.c:16:26: error: expected ')' before 'a'
   16 |         c = (int)(double(a) * b);
      |                          ^
      |                          )
main.c:16:28: error: expected ')' before '*' token
   16 |         c = (int)(double(a) * b);
      |                  ~         ^~
      |                            )
Language: C++

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mp make_pair
#define INF 0x3f3f3f3f
#define fast_cin()                    
    ios_base::sync_with_stdio(false); 
    cin.tie(NULL)
#define ll long long int
#define pi 3.141592653589792
int main()
{
      ll a;
    double  b;
    cin >> a >> b;
    //cout<<a<<b;
    double ans = (double)a *b;
    ans = (ll)ans;
    cout << ans;
    return 0;
}

Compiler output:
a.cc:8:30: error: expected constructor, destructor, or type conversion before '(' token
    8 |     ios_base::sync_with_stdio(false);
      |                              ^
a.cc:9:5: error: 'cin' does not name a type
    9 |     cin.tie(NULL)
      |     ^~~
Language: C++

#include<iostream>
using namespace std;
int main()
{
  int N,count;
  cin>>N;
  count=1;
  while(N!=1){
    for(int i=2; i<=N; i++){
      if(N%i==0){N=N/i;count++; break;}
    }
  }
  cout<<count<<endl;
}
#include<iostream>
using namespace std;
int main()
{
  int N,count;
  cin>>N;
  count=0;
  while(N!=1){
    for(int i=2; i<=N; i++){
      if(N%i==0){N=N/i;count++; break;}
    }
  }
  cout<<count<<endl;
}


Compiler output:
a.cc:17:5: error: redefinition of 'int main()'
   17 | int main()
      |     ^~~~
a.cc:3:5: note: 'int main()' previously defined here
    3 | int main()
      |     ^~~~
Language: C++

#include <bits/stdc++.h>
#define  ref(i,n) for(int i=0;i<n;i++)
#define INF 1000000000000000000
typedef long long ll;

using namespace std;
ll a,b;
double x;

int main()
{
    cin>>a>>x;
    b=ll(x*100);
    ll ans=a*(b/ll(100))+(a*((b%ll(100))/ll(10))/ll(10)+(a*(b%ll(10)))/ll(100);
    cout<<ans;
    return 0;
    }




Compiler output:
a.cc: In function 'int main()':
a.cc:14:79: error: expected ')' before ';' token
   14 |     ll ans=a*(b/ll(100))+(a*((b%ll(100))/ll(10))/ll(10)+(a*(b%ll(10)))/ll(100);
      |                          ~                                                    ^
      |                                                                               )
Language: C

#include<bits/stdc++.h>
#define int unsigned long long
using namespace std;
constexpr int mod=1e9+7;
signed main(){
    int a;
    double b;
    cin>>a>>b;
    cout<<(a*(int)(100*b))/100<<endl;
}

Compiler output:
main.c:1:9: fatal error: bits/stdc++.h: No such file or directory
    1 | #include<bits/stdc++.h>
      |         ^~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>

using namespace std;

int main(){
    int32_t a;
    double b;
    double32_t c;

    cin >> a >> b;

    c = a*b;
  
    cout << (int32_t)c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:5: error: 'double32_t' was not declared in this scope; did you mean 'double_t'?
    8 |     double32_t c;
      |     ^~~~~~~~~~
      |     double_t
a.cc:12:5: error: 'c' was not declared in this scope
   12 |     c = a*b;
      |     ^
Language: C++

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

int main() {
	long long a;
	double b, ans = 0;
	cin >> a >> b;
	ans = a * b;
	ans = floor(ans);
	cout << fixed << setprecision(0) << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: 'floor' was not declared in this scope
   10 |         ans = floor(ans);
      |               ^~~~~
Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
	long long int a,y;
	double b;
	double s;
	cin>>a>>b;
	s=a*b;
	cout<<long long int(s);
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:15: error: expected primary-expression before 'long'
    9 |         cout<<long long int(s);
      |               ^~~~
Language: C++

#include <iostream>

int main(void){

   unsigned long long a;
   double b;
   std::cin >> a >> b;
   unsigned long long  c = static_cast<unsigned long long>(b*100);
   long long int c = a * b /100;
   std::cout << c << std::endl;
   return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:18: error: conflicting declaration 'long long int c'
    9 |    long long int c = a * b /100;
      |                  ^
a.cc:8:24: note: previous declaration as 'long long unsigned int c'
    8 |    unsigned long long  c = static_cast<unsigned long long>(b*100);
      |                        ^
Language: C++

#include <bits/stdc++.h>
using namespace std;
using ll=long long;
#define rep(i,N) for(int i=0; i<N; i++){    ;
int main() {
long long A;
double B;
cin>>A>>B;
cout<<long long(A*B)<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:9:7: error: expected primary-expression before 'long'
    9 | cout<<long long(A*B)<<endl;
      |       ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define endl "\n"
#define int long long
#define int long long
const int N= 1e3+5;
int32_t main()
{
    IOS;
    int a;
    double b;
    cin>>a>>b;
    b = b*100.0;
    int b2= (round)b;
   // cout<<b2<<endl;
    int ans= ((a*b2)/100);
    cout<<ans<<endl;
    return 0;
}



Compiler output:
a.cc: In function 'int32_t main()':
a.cc:16:19: error: cannot resolve overloaded function 'round' based on conversion to type 'long long int'
   16 |     int b2= (round)b;
      |                   ^
Language: C

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


int main(){
    long A;
    double B;
    cin >> A >> B;

    if((long)floor(A)==0 || (long)floor(B)==0){
        cout << 0 << endl;
        return 0;
    }

    double res = floor(A*B);
    long hoge = res;

    printf("%ld\n",hoge);
    
    return 0;
}


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

#include <bits/stdc++.h>
using namespace std;
int main(){
  int A;
  double B;
  cin >> A >> B;
  double C = A * B;
  cout << round(C) << endl;
}

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

#include <bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define mp make_pair
#define INF 0x3f3f3f3f
#define fast_cin()                    
    ios_base::sync_with_stdio(false); 
    cin.tie(NULL)
#define ll long long int
#define pi 3.141592653589792
int main()
{
    double a, b;
    cin >> a >> b;
    //cout<<a<<b;
    double ans = (double)a * (double)b;
    ans = (ll)ans;
    cout << ans;
    return 0;
}

Compiler output:
a.cc:8:30: error: expected constructor, destructor, or type conversion before '(' token
    8 |     ios_base::sync_with_stdio(false);
      |                              ^
a.cc:9:5: error: 'cin' does not name a type
    9 |     cin.tie(NULL)
      |     ^~~
Language: C++

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

int main() {
    long long a;
    double b;
    cin >> a >> b;
    long long c = a * b;
    cout << c << endl;

Compiler output:
a.cc: In function 'int main()':
a.cc:10:23: error: expected '}' at end of input
   10 |     cout << c << endl;
      |                       ^
a.cc:5:12: note: to match this '{'
    5 | int main() {
      |            ^
Language: C++

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

}
int main() {
    double a,b;
    cin>>a,b;
    double ans=a*b;
    int x;
    x=ans;
    cout<<x<<endl;


}


Compiler output:
a.cc:7:1: error: expected declaration before '}' token
    7 | }
      | ^
Language: C++

#include<iostream>
int main()
{
  int a;long double b;
  cin>>a>>b;
  int c=a*b;
  cout<<c;
}

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>>a>>b;
      |   ^~~
      |   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<<c;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> P;
#define int long long
int INF = 1e9+7;
signed main() {
    long double A,B;
    cin >> A >> B;
    long double ans = A*B;
    long double eps = 1.0E-14;
    long double ans = A*B+eps-0.5;
    cout << fixed << setprecision(0) << ans << endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:11:17: error: redeclaration of 'long double ans'
   11 |     long double ans = A*B+eps-0.5;
      |                 ^~~
a.cc:9:17: note: 'long double ans' previously declared here
    9 |     long double ans = A*B;
      |                 ^~~
Language: C++

#include <iostream>
using namespace std;
int main(void){
  double a[2];
  int i=0;
  while(cin>>l){
    a[i]=l;
    i++;
  }
  print(int(a[0]*a[1]))
}

Compiler output:
a.cc: In function 'int main()':
a.cc:6:14: error: 'l' was not declared in this scope
    6 |   while(cin>>l){
      |              ^
a.cc:10:3: error: 'print' was not declared in this scope; did you mean 'printf'?
   10 |   print(int(a[0]*a[1]))
      |   ^~~~~
      |   printf
Language: C++

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

int main() {
  int64_t A;
  double B;
  cin >> A;
    cin >>B;
  
  x == A*B ;
  cout << (int)x << endl; // double型の値をint型に変換
}


Compiler output:
a.cc: In function 'int main()':
a.cc:10:3: error: 'x' was not declared in this scope
   10 |   x == A*B ;
      |   ^
Language: C++

#include<iostream>
int main()
{
  int a,;long double b;
  cin>>a>>b;
  int c=a*b;
  cout<<c;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:4:9: error: expected unqualified-id before ';' token
    4 |   int a,;long double b;
      |         ^
a.cc:5:3: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    5 |   cin>>a>>b;
      |   ^~~
      |   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<<c;
      |   ^~~~
      |   std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
Language: Java

import java.util.*;
public class Solution {
    public static void main(String args[]) {
		Scanner sc=new Scanner(System.in);
		long x; double y;
                x=sc.nextLong();
                y=sc.nextDouble();
                long z=(long) (x*y);
                System.out.print(z);
    }
}

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

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,y;
	double(negative) b;
	double s;
	cin>>a>>b;
	s=a*b;
	y=s;
	cout<<y;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:5:16: error: 'negative' was not declared in this scope
    5 |         double(negative) b;
      |                ^~~~~~~~
a.cc:7:17: error: 'b' was not declared in this scope
    7 |         cin>>a>>b;
      |                 ^
Language: C++

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

int main (){
   	long int A;
  	float B;
    cin >> A >> B;


  	int BB = 100*B;


    long int ans = A*BB;
    ans = ans/100;
    cout <</* A << " " << B << " " << BC_BASE_MAX << " " */<< ans << endl;



    
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:60: error: expected primary-expression before '<<' token
   15 |     cout <</* A << " " << B << " " << BC_BASE_MAX << " " */<< ans << endl;
      |                                                            ^~
Language: C++

#include <iostream>
#include <algorithm>
#include <array>
#include <deque>
#include <vector>
#include <utility>
#include <string>
#include <cmath>

int main()
{
    uint64_t a = 0;
    long double b = 0.0;
    std::cin >> a >> b;
    long double ans = static_cast<long double>(a)* b;
    std::cout << static_cast<uint64_t>(std::floorl(ans));
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:5: error: 'uint64_t' was not declared in this scope
   12 |     uint64_t a = 0;
      |     ^~~~~~~~
a.cc:9:1: note: 'uint64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
    8 | #include <cmath>
  +++ |+#include <cstdint>
    9 | 
a.cc:14:17: error: 'a' was not declared in this scope
   14 |     std::cin >> a >> b;
      |                 ^
a.cc:16:30: error: 'uint64_t' does not name a type
   16 |     std::cout << static_cast<uint64_t>(std::floorl(ans));
      |                              ^~~~~~~~
a.cc:16:30: note: 'uint64_t' is defined in header '<cstdint>'; this is probably fixable by adding '#include <cstdint>'
Language: C++

#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
#define MOD 1000000007
#define ll long long int
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL);
 
using namespace std;
 
 
int main()
{
	
    fastio
    double a, b;
  cin>>a>>b;
  ll ans=a*b;
  cout<<ans
}

Compiler output:
a.cc:2:10: fatal error: boost/multiprecision/cpp_int.hpp: No such file or directory
    2 | #include <boost/multiprecision/cpp_int.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main() {
  double a,b;
  cin >> a >> b;
  int c = a * b;
  
    for (int i = 1; c < 1; i++){
      c = c - 1;
    }
  cout << i << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:12:11: error: 'i' was not declared in this scope
   12 |   cout << i << endl;
      |           ^
Language: C

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define REP(i, n) for (int i = 0; i < (int)n; ++i)
#define RREP(i, n) for (int i = (int)n - 1; i >= 0; --i)
#define FOR(i, s, n) for (int i = s; i < (int)n; ++i)
#define RFOR(i, s, n) for (int i = (int)n - 1; i >= s; --i)
#define ALL(a) a.begin(), a.end()
#define IN(a, x, b) (a <= x && x < b)
template<class T>inline void out(T t){cout << t << "\n";}
template<class T,class... Ts>inline void out(T t,Ts... ts){cout << t << " ";out(ts...);}
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;}
constexpr int INF = 1e18;


signed main(){
	long double A;
	long double B;
	cin >> A >> B;
	int ans = A*B;
	out(ans);
}

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

#include <iostream>

using namespace std;

int main() {
	double A,B;
cin>>A>>B;
	long long C=A*B
	cout << C << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:9:9: error: expected ',' or ';' before 'cout'
    9 |         cout << C << endl;
      |         ^~~~
Language: C++

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

int main(){
    ll a;
    double b;
    cin >> a >> b;
    a*=100;
    b*=100;
    ll c = a*b; 
    c/=1000
    cout << c << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:12: error: expected ';' before 'cout'
   14 |     c/=1000
      |            ^
      |            ;
   15 |     cout << c << endl;
      |     ~~~~
Language: C++

#include<bits/stdc++.h> 
using namespace std;
int main()
{ 
	long long a;
	long double b;
	cin>>a>>b;
	cout<<long long(a*b);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:8:15: error: expected primary-expression before 'long'
    8 |         cout<<long long(a*b);
      |               ^~~~
Language: C++

#include <iostream>
#include <vector>
#include <cstdlib>  
#include <algorithm>
#include <string>
#include <math.h>

using namespace std;
 
int main() {
    long a;
    double b;
    cin>>a>>b;
  　cout<<long(a*b);
    return 0;
}

Compiler output:
a.cc:14:3: error: extended character 　 is not valid in an identifier
   14 |   　cout<<long(a*b);
      |   ^
a.cc: In function 'int main()':
a.cc:14:3: error: '\U00003000cout' was not declared in this scope
   14 |   　cout<<long(a*b);
      |   ^~~~~~
Language: C++

#include <stdio.h>
#include <iostream>
#include <string>

int main() {

	long long A,ans;
	double  B;
	std::cin >> A >> B;
	ans = floor(A * B);
	std::cout << ans << std::endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:15: error: 'floor' was not declared in this scope
   10 |         ans = floor(A * B);
      |               ^~~~~
Language: C++

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

int main() {
	//freopen("input.txt", "r", stdin);
	long long a;
	char b[10000];
	cin >> a >> b;
	cout << long long(atof(b) * a);
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:17: error: expected primary-expression before 'long'
   10 |         cout << long long(atof(b) * a);
      |                 ^~~~