leetcode_cpp/string/1154.cpp

/*
 * @Description:
 * @Version: 1.0
 * @Autor: zhuyijun
 * @Date: 2021-12-21 10:29:00
 * @LastEditTime: 2021-12-21 10:55:22
 */
#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
int dayOfYear(string date) {
  if (date.size() != 10) {
    return 0;
  }
  string year = date.substr(0, 4);
  string month = date.substr(5, 2);
  string day = date.substr(8, 2);
  int y = stoi(year);
  int m = stoi(month);
  int d = stoi(day);
  int a[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
  if (y != 1990 && (y % 4 == 0)) a[2] += 1;
  int ret = 0;
  for (int i = 1; i < m; i++) {
    ret += a[i];
  }
  return d + ret;
}

int main() { cout << dayOfYear("2020-12-21"); }