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17 lines
226 B

#include <iostream>
using namespace std;
int main()
{
int val, sum, i;
int TOTAL = (1 + 13) * 13;
int N = 26;
sum = 0;
for (i = 1; i < N; i++) {
cin >> val;
sum += val;
}
printf("%d\n", TOTAL - sum);
return 0;
}