1154. 一年中的第几天

1154. 一年中的第几天

• 难度: easy
• 原始链接: https://leetcode.cn/problems/day-of-the-year
• 标签: 直接计算

解法一: 直接计算

go

func dayOfYear(date string) int {
    year, _ := strconv.Atoi(date[:4])
    month, _ := strconv.Atoi(date[5:7])
    day, _ := strconv.Atoi(date[8:])
    months := []int{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
    daySum := 0
    for i := 1; i < month; i++ {
        daySum += months[i - 1]
    }
    if month > 2 && isLeep(year) {
        daySum++
    }
    return daySum + day
}

func isLeep(year int) bool {
    return (year % 400 == 0) || ((year % 4 == 0) && (year % 100 != 0))
}