import math
import sys
x,y=list(map(int,input().split()))
s=0
ii=x
for i in range(x,x+y):
    if ii==6 or ii==7:
        pass
    else:
        s=s+250
    ii=ii+1
    if ii>7:
        ii=1
print(s)

/**************************************************************
	Problem: 1468
	User: admin
	Language: Python
	Result: Accepted
	Time:188 ms
	Memory:34480 kb
****************************************************************/