世界上最好的题解😄

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

看完的麻烦点个赞呗👀️

#include<iostream>
using namespace std;

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

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

//垃圾题,就应该用垃圾做法
//(water problem)
#include<bits/stdc++.h>
using namespace std;
const int mx=10100;
int a[mx],b[mx],c[mx];
int la,lb,lc,i,j,x;
int main()
{
	string s1,s2;
	cin>>s1>>s2;
	la=s1.size(),lb=s2.size();
	for(i=0;i<la;i++) a[la-i-1]=s1[i]-'0';
	for(i=0;i<lb;i++) b[lb-i-1]=s2[i]-'0';
	for(i=0;i<la;i++){
		x=0;
		for(j=0;j<lb;j++){
			c[i+j]=a[i]*b[j]+x+c[i+j];
			x=c[i+j]/10;
			c[i+j]%=10;
		}
		c[i+lb]=x;
	}
	lc=la+lb;
	while(c[lc]==0 && lc>0) lc--;
	for(i=lc;i>=0;i--) cout<<c[i];
    return 0;
}