SB题

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