// editor1
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
double degreesToRadians(double degrees){
    return degrees * (M_PI/ 180);
}
int main(){
    double degrees;
    scanf("%lf",&degrees);
    double radians = degreesToRadians(degrees);
    printf("%.2lf\n",round(radians * 100)/100);
    return 0;
}