My program answer true for input from example(for big number too), but i get "Wrong answer" on test 1.

#include <stdio.h>
#include <math.h>
#define N 1000000
int main(int argc, char **argv)
{
    long long int array[N];
    int i=0;
    while (scanf("%Ld", &array[i])>0) {
        i++;
    }
    for(i-=1;i>=0;i--)
        printf("%.4f\n", sqrt(array[i]));
    return 0;
}

1) Try scanf "%lld".
2) DONT try allocate such big arrays on stack. Place your array outside function/in heap/use vector

1)Thank you! Ofc, lld for long long...
2)Yes, its just a test.