#include <iostream>
#include <algorithm>
using namespace std;

int calDiff(int a,int b,int c) {
    int diff;
    int maxn = max({a,b,c});
    diff = (a + b + c) - 2*maxn;
    return diff;
}

int main() {
    int a, b, c;
    while(cin >> a >> b >> c) {
        if(!(a == 0 && b == 0 && c == 0)){
            cout << calDiff(a, b, c) << endl;
        }
    }
    return 0;
}