#include<stdio.h>
#include<math.h>
float degreesToRadians(float degrees)
    const float PI = 3.1459265358979323846;
    return degrees * (PI / 180.0);
}
int main()
{
    float degrees,radians;
    if(scanf("%f",&degrees) != 1)
    {
        return 1;
    }
    radians = degreesToRadians(degrees);
    printf("%.2f\n",radians);
    return 0;
}