uva12019.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    const int days[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    const char* day[7] = { "Sunday", "Monday", "Tuesday", "Wednesday",
                            "Thursday", "Friday", "Saturday"};

    int T;
    scanf("%d", &T);

    while (T--) {
        int M, D;
        scanf("%d %d", &M, &D);

        int cnt = 0;
        int i;
        for(i=1; i<M; i++)
            cnt += days[i];

        cnt += D;

        /*Jan. 1 is Saturday*/
        /*Calculate the day from Jan.1*/
        printf("%s\n", day[(6+cnt-1) % 7]);
    }

    return 0;
}