Skip to content

Latest commit

 

History

History
143 lines (110 loc) · 3.56 KB

README_EN.md

File metadata and controls

143 lines (110 loc) · 3.56 KB
Raw

1185. Day of the Week

中文文档

Description

Given a date, return the corresponding day of the week for that date.

The input is given as three integers representing the day, month and year respectively.

Return the answer as one of the following values {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}.

 

Example 1:

Input: day = 31, month = 8, year = 2019
Output: "Saturday"

Example 2:

Input: day = 18, month = 7, year = 1999
Output: "Sunday"

Example 3:

Input: day = 15, month = 8, year = 1993
Output: "Sunday"

 

Constraints:

  • The given dates are valid dates between the years 1971 and 2100.

Solutions

Zeller formula.

Python3

class Solution:
    def dayOfTheWeek(self, day: int, month: int, year: int) -> str:
        return datetime.date(year, month, day).strftime('%A')
class Solution:
    def dayOfTheWeek(self, d: int, m: int, y: int) -> str:
        if m < 3:
            m += 12
            y -= 1
        c = y // 100
        y = y % 100
        w = (c // 4 - 2 * c + y + y // 4 + 13 * (m + 1) // 5 + d - 1) % 7
        return ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"][w]

Java

import java.util.Calendar;

class Solution {
    private static final String[] WEEK = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

    public static String dayOfTheWeek(int day, int month, int year) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, day);
        return WEEK[calendar.get(Calendar.DAY_OF_WEEK) - 1];
    }
}
class Solution {
    public String dayOfTheWeek(int d, int m, int y) {
        if (m < 3) {
            m += 12;
            y -= 1;
        }
        int c = y / 100;
        y %= 100;
        int w = (c / 4 - 2 * c + y + y / 4 + 13 * (m + 1) / 5 + d - 1) % 7;
        return new String[] {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday",
            "Saturday"}[(w + 7) % 7];
    }
}

C++

class Solution {
public:
    string dayOfTheWeek(int d, int m, int y) {
        if (m < 3) {
            m += 12;
            y -= 1;
        }
        int c = y / 100;
        y %= 100;
        int w = (c / 4 - 2 * c + y + y / 4 + 13 * (m + 1) / 5 + d - 1) % 7;
        vector<string> weeks = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
        return weeks[(w + 7) % 7];
    }
};

Go

func dayOfTheWeek(d int, m int, y int) string {
	if m < 3 {
		m += 12
		y -= 1
	}
	c := y / 100
	y %= 100
	w := (c/4 - 2*c + y + y/4 + 13*(m+1)/5 + d - 1) % 7
	weeks := []string{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}
	return weeks[(w+7)%7]
}

...