提交记录 #465

#include <stdio.h>

const char outStr[7][15] = {
    "Free.",
    "3 and 8.",
    "4 and 9.",
    "5 and 0.",
    "1 and 6.",
    "2 and 7.",
    "Free."
};

int dIM[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int dIMBKS[13] = {0, 365, 334, 306, 275, 245, 214, 184, 153, 122, 92, 61, 31}; 
int dIMFtS[13] = {0, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335}; 

int iLY(int year) {
    return (year % 4 == 0 && year % 100 != 0) || year % 400 == 0;
}
#define D_IM(y, m) ((m == 2 && iLY(y)) ? 29 : dIM[m])
#define D_IMBKS(y, m) ((m <= 2 && iLY(y)) ? dIMBKS[m] + 1 : dIMBKS[m])
#define D_IMFtS(y, m) ((m >= 2 && iLY(y)) ? dIMFtS[m] + 1 : dIMFtS[m])

int main() {
    int days = 0, sy = 2012, sm = 4, sd = 8, ty, tm, td;
    scanf("%d%d%d", &ty, &tm, &td);
    if (sy < ty ) {
        days += D_IMBKS(sy, sm) - sd + 1;
        sy++;sm=1;sd=1;
    }
    while (sy < ty) {
        days += 365 + iLY(sy);
        sy++;
    }
    days += D_IMFtS(ty, tm) + td - D_IMFtS(sy, sm) - sd;
    int week = days % 7; days/=91;days%=5;
    if (week != 0 && week != 6) {
        week = (week - days+ 4) % 5 + 1;
    }
    puts(outStr[week]);

    return 0;
}