#include <stdio.h>
#include <math.h>
int main()
{
    long int a,b,c;
    scanf("%ld %ld %ld",&a,&b,&c);
    long int min=a;
    if(a<c)
    min=a;
    else min=c;
    if(b<a)
    min = b;
    if(b<c)
    min = b;
    else min = c;
    printf("%lf",sin(min));
    return 0;
    
    
    
}