#include <stdio.h>
#include <math.h>
int main( int argc, char ** argv )
{
unsigned long number[256*1024];
int counter = 0;
while( scanf("%lu",&number[counter]) != EOF )
{
counter++;
}
for( counter--; counter >= 0; counter-- )
printf("%.4f\n",sqrt(number[counter]));
return 0;
}
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