1154. Day of the Year

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Given a string date representing a Gregorian calendar date formatted as YYYY-MM-DD, return the day number of the year. Example 1: Input: date = "2019-01-09" Output: 9 Explanation: Given date is the 9th day of the year in 2019. Example 2: Input: date = "2019-02-10" Output: 41 Constraints: - date.length == 10 - date[4] == date[7] == '-', and all other date[i]'s are digits - date represen

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solution.cppC++17

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