n=int(input()) l=list(map(int,input().split())) c=0 for i in r | CODING SOLUTION - Placement Jobs & Materials

n=int(input())
l=list(map(int,input().split()))
c=0
for i in range(0,len(l)):
for j in range(i+1, len(l)):
s=l[i]+l[j]
if s%60==0:
c=c+1
print(c)

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