Wednesday, May 30, 2018

UVA - 10286 .cpp file

#include <stdio.h>
#include <math.h>
#define pi acos(0.0)

int main()
{
    double n;

    while(scanf("%lf",&n)==1)
    {
        printf("%.10lf\n",(n*sin(108*pi/90)/sin(63*pi/90)));
    }

    return 0;
}

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