#include <stdio.h>
 
int main()
{
    long long int a, b, c, d;
    scanf("%lld %lld %lld %lld",&a, &b, &c, &d);
    
    a = a%100;
    b = b%100;
    c = c%100;
    d = d%100;
    
    long long int mul = a;
    mul = (mul*b)%100;
    mul = (mul*c)%100;
    mul = (mul*d)%100;
    printf("%03lld",mul%100);

}