题解

#include<bits/stdc++.h>
using namespace std;
int main(){
int a,b,c;
cin >> a >> b >> c;
if(a+b<=c){
cout << "no";
return 0;
}
if(a+c<=b){
cout << "no";
return 0;
}
if(b+c<=a){
cout << "no";
return 0;
}
cout << "yes";
return 0;
}