#include<iostream>
using namespace std;

int main(int argc, char *argv[])
{
	int B[9];
	int sum;
	
	for(int i = 0; i < 9; i++){
		cin >> B[i];
	}
	
	sum = 0;
	
	for(int i = 0; i < 9; i++){
		sum += B[i];
	}
	
	cout << 55 - sum << endl;
	
}