tomadas_noic.cpp

#include <bits/stdc++.h>
using namespace std;

int main(){
    int t1,t2,t3,t4;
    scanf("%d %d %d %d", &t1, &t2, &t3, &t4);
    printf("%d\n",(t1+t2+t3+t4-3));
    return 0;
}