#include #include using namespace std;

int main() { long long a, b; cin >> a >> b; cout << a * b << endl;

return 0;

}

#include #include using namespace std;

int main() { long long a, b; cin >> a >> b; cout << a * b << endl;

return 0;

}

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

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

最短写法:

#include<iostream>
using namespace std;int main(){int a,b;cin>>a>>b;cout<<a*b;return 0;}

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