#include<stdio.h>
#include<math.h>

float degreesToRadians(float degrees) {
    return degrees * (M_PI / 180.0);
}

int main() {
    float angleDegrees;
    scanf("%f", &angleDegrees);
    float angleRadians = degreesToRadians (angleDegrees);
    printf("%.2f\n", angleRadians);
    return 0;
}