n=[]
c=[]
for i in range(4):
x,y=input().split()
x=int(x)
y=int(y
n.append(x)
c.append(y)
for i in range(4):
f=0
x = (n[i]-c[i]) * 60
f+=x
if x<=60:
continue
elif x<=300:
x+=x/20
elif x > 240:
f-=x
x=240
f+=x
o+=x
if f >= 900:
o-=o/20
print(f//30*5000)
3회 조회

