#include <stdio.h>
#include <iostream>
using namespace std;
int main() {
int s = 0;
int n = 10;
int A[n]={0,2,4,6,8,10,12,14,16,18,20};
for (int i = 0; i <= n; i++ )
if(A[n - i]-A[i] > A[i])
s = s+ A[i];
cout<<s;
}
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