题目：输入某年某月某日，判断这一天是这一年的第几天？

1.程序分析：以3月5日为例，应该先把前两个月的加起来，然后再加上5天即本年的第几天，特殊

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-topic : input on a certain date, the judgment that this is the one day of the year? 1. Program Analysis : March 5 as an example, should first get the first two months combined, plus five days this year that the first few days, the special situation