1924번: 2007년

https://www.acmicpc.net/problem/1924

#include<stdio.h>
int f[13] = { 0,31,59,90,120,151,181,212,243,273,304,334,365 }, x, y;
char ans[7][5] = { "SUN","MON","TUE","WED","THU","FRI","SAT" };
int main()
{
    scanf("%d%d", &x, &y);
    printf("%s", ans[(f[x - 1] + y) % 7]);
    return 0;
}