#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;
        
}