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# Enter your code here. Read input from STDIN. Print output to STDOUTimportcollectionsX=int(input())shoe_sizes=list(map(int,input().split()))N=int(input())amount=0segregation=collections.Counter(shoe_sizes)foriinrange(N):shoe_data=list(map(int,input().split()))if(shoe_data[0]insegregation.keys()andsegregation[shoe_data[0]]!=0):amount+=shoe_data[1]segregation[shoe_data[0]]-=1print(amount)
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collections.Counter()
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