A. Dawid and Bags of Candies

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t=4,ar[100];

    for(int i=0;i<t;i++)
    {
        cin>>ar[i];
    }
    sort(ar,ar+4);
    if(ar[0]+ar[3]==ar[1]+ar[2] || ar[0]+ar[1]+ar[2]==ar[3] )
        cout<<"YES"<<endl;
    else
    cout<<"NO"<<endl;




    return 0;

}