#include <iostream>
using namespace std;
int main() {
// your code goes here
int arr[] = {2,7,11,15};
int target = 9;
int n1, n2;
for(int i = 0 ; i < 4 ; i++)
{
for(int j = 0 ; j < 4 ; j++)
{
if(arr[i] + arr[j] == target)
{
n1 = i;
n2 = j;
}
}
}
cout<< n1 << " , " << n2;
return 0;
}
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