//if 'double s[130196]' before 'int main()' - all is OK!!
//but if 'double s[130196]' in 'int main()' then Runtime error (stack overflow)!!!!!!!
//-------------------------------------------------
//AND MAGIC №2:
//any number after 130196 (for example 130196,130197...) in 'double s[130196]' - all is OK!!
//BUT numbers before 130196, for example 130195, 130194... then Runtime error (access violation)!!!
//------------
//on the internet people use 'double s[131072]' - it is 2^17, why???? if i can use 130196
//------------------
#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

double s[130196];// if 130195 or < then Runtime error (access violation)!!!
int main()
{
        //double s[130196]; - if in 'int main()' then Runtime error (stack overflow)
    int t = 0;
    while (cin>>s[t]){t++;}
    while(t>0){cout<<fixed<<setprecision(4)<<sqrt((double)s[--t])<<endl;}
    return 0;
}
//why why why ??))

Edited by author 14.07.2015 17:12

Array from main function is kept in stack memory, and this memory is limited. You should declare it as global, or increase stack size.