#include<string>
#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std;
int main()
  {
    long double inp[128*1024];
    int i=0;
    while (cin>>inp[i])
        {
        i++;
        }
        i--;
        while ( i >= 0)
        {
        cout<<setprecision(4)<<fixed<<sqrt(inp[i])<<endl;
        i--;
        }
   return 0;
  }

PS - for 876652098643267843 the range of long double is exceeded

long double inp[128*1024];
run out of Memory!:-)Maybe u can try another way to store the data.