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Copy pathApplejackAndStorages.py
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ApplejackAndStorages.py
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# problem: https://codeforces.com/contest/1393/problem/B
defcheck(tem2, tem4):
if(tem4<1):
returnFalse
if(tem4>=2):
returnTrue
if(tem2>=4):
returnTrue
returnFalse
num=int(input())
init=input().split()
dic= {}
tem4=0
tem2=0
resultado= []
foriininit:
ifiindic:
tem4-=int(dic[i]/4)
tem2-=int(dic[i]/2)
dic[i] +=1
tem4+=int(dic[i]/4)
tem2+=int(dic[i]/2)
else:
dic[i] =1
num=int(input())
foriinrange(num):
a, b=input().split()
if(a=="+"):
ifbindic:
tem4-=int(dic[b]/4)
tem2-=int(dic[b]/2)
dic[b] +=1
tem4+=int(dic[b]/4)
tem2+=int(dic[b]/2)
else:
dic[b] =1
else:
tem4-=int(dic[b]/4)
tem2-=int(dic[b]/2)
dic[b] -=1
tem4+=int(dic[b]/4)
tem2+=int(dic[b]/2)
if(check(tem2, tem4)):
resultado.append("YES")
else:
resultado.append("NO")
print("\n".join(resultado))
