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思路

python做这题很简单，灵活用datetime库即可

code

import os
import sys# 请在此输入您的代码
import datetimestart = datetime.datetime(1970,1,1,0,0,0)
for _ in range(int(input())):ls = input().split()end = datetime.datetime.strptime(ls[0]+ls[1],"%Y-%m-%d%H:%M:%S")x = int(ls[2])n = (end-start)// datetime.timedelta(minutes=x)ans = (start + n * datetime.timedelta(minutes = x)).strftime("%Y-%m-%d %H:%M:%S")print(ans)