题解

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

int main()
{
    long a[3];
    cin >> a[0] >> a[1] >> a[2];
    sort(a,a+3);
    if (a[0]+a[1]>a[2])
        cout << "yes";
    else
        cout << "no";
    return 0;
}