#pragma comment(linker, "/STACK:16777216") //cpp stuff
#include <stdio.h>
#include <math.h>

int main() {
   unsigned long long a[0x20000];
   long i=0;
   while (scanf("%llu", &a[i++]) != EOF);
   i--;
   while (i) printf("%.4f\n", sqrt((long double)a[--i]));
   return 0;
}