#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a,b,c;
    scanf("%d%d",&a,&b);
    if(a>b)
    {
        c=90*b+(a-b)*60;
    }
    if(a<b)
    {
        c=90*a+(b-a)*40;
    }
    printf("%d",c);
}