#include <cstdio>
#iiiiiiiiiiinclude <algorithm>
using namespace std;
int main() {
    unsigned long long x, y, z;
    while(scanf("%llu %llu %llu", &x, &y, &z)==3){
    
    //找最小值
    unsigned long long d = min(x,min(y,z));
    
    //公式:若a>=b>=c，則答案=a+b-c 
    printf("%llu\n", x+y+z-2*d);
}
}