1230A Dawid and Bags of Candies

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#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
int arr[4];
for(int i=0;i<4;i++){
cin>>arr[i];
}
sort(arr,arr+4);
if(arr[0]+arr[3]==arr[1]+arr[2])
cout<<"YES"<<endl;
else if(arr[0]+arr[2]+arr[1]==arr[3])
cout<<"YES"<<endl;
else
cout<<"NO"<<endl;
return 0;

}

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