import sys
n=int(input())
a=list(map(int,input().rstrip().split()))
z=0
c=0
b=[]
s=[]
k=[]
st=[]
co=[]
ta=[]
la=[]
tt=[]
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[ZCO12001] Matched Brackets (ZCO 2012: India)
Zonal Computing Olympiad is round 1 out of 3 (i.e. beginner) for selection into Indian IOI team.
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