CCC 2018 J1 - Fergusonball Ratings Solution

#Morgan Su, BayviewSS
#Calculations and arrays
pn=int(input())
s=[]
f=[]
total=[]
for i in range(pn):
    s+=[int(input())]
    f+=[int(input())]

counter=0
truther=0
star=0
    
for i in range(pn):
    score=s[counter]*5
    score=score-f[counter]*3
    total+=[score]
    
    if score<=40:
        truther+=1

    if score>40:
        star+=1
    
    counter+=1
    
if truther==0:
    print(star, end="")
    print("+")
else:
    print(star)