#include<cstdio>
#include<iostream>
#include<cmath>
using namespace std;

int main(){
     int a,b,i,sw;
     double c;
     cin >> a >> b;
     a = a * a;
     b = b * b;
     for(i = 1;i++;sw = 0){
          c = i;
          if(a == b + c){
               sw = 1;
          }
          else{
               if(b == a + c){
                    sw = 1;
               }
               else{
                    if(c == a + b){
                         sw = 1;
                    }
               }
          }
     }
     c = sqrt(c);
     printf("%f",c);
     return 0;
}