键盘敲碎夜深沉，代码如麻乱假真 · 发布于 2024-12-16 · 浏览 662 回复 0

#include<bits/stdc++.h>
using namespace std;
string n;
int main(){
	cin>>n;
	if(n[0]-'0'+n[2]-'0'==n[1]-'0'+n[3]-'0') cout<<"YES"<<endl;
	else cout<<"NO"<<endl;
	return 0;
}