codeforces 899b

题目大意：给出不超过24个数字，判断是否是连续的月份

思路：打表循环判断

要注意平平年 平闰年 闰闰年

ac代码：

#include<bits/stdc++.h>
using namespace std;
int m[12] = {31,28,31,30,31,30,31,31,30,31,30,31}; 
int m1[12] = {31,29,31,30,31,30,31,31,30,31,30,31};
int mon[24];
int main() {
	int n;
	while(~scanf("%d",&n)) {
		m1[1] = 29;
		for(int i = 0; i < n; i++) {
			scanf("%d",&mon[i]); 
		}
		int flag = 0;
		for(int i = 0; i < 12; i++) {
			if(mon[0] == m[i] || mon[0] == m1[i]) {
				if(mon[0] == 29) {
					m1[1] = 28;
				}
				int j = i;
				int count  = 1;
				int sum = 0;
				while(1) {
					sum++;
					j++;
					j %= 12;
					if(count == n) {
						flag = 1;
						break;
					}
					if(mon[sum] == m[j] || mon[sum] == m1[j]) {
						if(mon[sum] == 29) {
							m1[1] = 28; 
						}
					}
					else {
						break;
					}
					count++;
				}
			}
		}
		if(flag) {
			printf("Yes\n");
		}
		else{
			printf("No\n");
		}
	}
	return 0;
}