P1

/*
======================
[     ___T_          ]
[    | 6=6 | =>HI :-)]
[    |__o__|         ]
[ >===]__o[===<      ]
[     [o__]          ]
[      .".           ]
[      |_|           ]
[                    ]
======================
 */

#include<bits/stdc++.h>
using namespace std;
using lli = int64_t;
int main(){
     ios::sync_with_stdio(false);
     cin.tie(nullptr);
     cout.tie(nullptr);
     int h,b,l;
     cin >> h >> b >> l;
     cout << sqrt(pow(h,2) + pow(b,2) + pow(l,2)) << "\n";
}