提交记录 #464

#include <stdio.h>
#include <stdbool.h>
int daysDifference();
// 判断是否是闰年
bool isLeapYear(int year) {
    return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
}

// 获取某年某月的天数
int daysInMonth(int year, int month) {
    switch (month) {
        case 1: case 3: case 5: case 7: case 8: case 10: case 12:
            return 31;
        case 4: case 6: case 9: case 11:
            return 30;
        case 2:
            return isLeapYear(year) ? 29 : 28;
        default:
            return 0; // 不应该发生的情况
    }
}

// 计算给定日期与2012年4月8日之间的天数差
int daysDifference(int year, int month, int day) {
    // 2012年4月8日之前的天数
    int daysBefore = 0,y,m;
    for ( y = 2012; y < year; ++y) {
        daysBefore += isLeapYear(y) ? 366 : 365;
    }
    for ( m = 4; m < month; ++m) {
        daysBefore += daysInMonth(year, m);
    }
    daysBefore += day - 8;

    // 如果给定日期在2012年4月8日之前，则结果为负数
    if (year < 2012 || (year == 2012 && (month < 4 || (month == 4 && day < 8)))) {
        return -daysBefore;
    }
    return daysBefore;
}
void calculateRestriction(int daysDiff) {
    int weekDayIndex = (daysDiff + 7) % 7;
    char restrictions[7][100] = {"Free.", "1 and 6.", "2 and 7.", "3 and 8.", "4 and 9.", "5 and 0.", "Free."};
    printf("%s\n", restrictions[weekDayIndex]);
}

int main() {
    int year, month, day;
    scanf("%d %d %d", &year, &month, &day);
    int dd = daysDifference(year, month, day);
    calculateRestriction((dd + 1) % 7); // 加1是因为从0开始计数
    return 0;
}