10 lines
236 B
Python
10 lines
236 B
Python
import sys
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sys.stdin = open("input.txt", "r")
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sys.stdout = open("output.txt", "w")
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n = int(input())
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count = 0
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for i in range(n):
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for j in list(map(int, input().split())):
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count = count + j
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count = count / 2
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print(int(count)) |