#include <iostream>
using namespace std;
int main() {
// your code goes here
int a[]={5,6,4,3,6};
int n=sizeof(a)/sizeof(a[0]);
int k=7;
for(int i=0;i<n;i++){
for(int j=i+1;j<n;j++){
if(a[i]+a[j]<=k){
cout<<"yes";
return 0;
}
}
}
cout<<"no";
return 0;
}
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