백준(baekjoon)(BaekJoon)코딩 1924번:2007년 답

#include <iostream>
using namespace std;
int main(){
 int a,b,c,d,k;
 a=20;
 b=7;
 cin>>c>>d;
 if(c==1)
 {
 c=13;
 b=6;
 }
 if(c==2)
 {
 c=14;
 b=6;
 }
 k=(21*a/4)+(5*b/4)+(26*(c+1)/10)+d-1;
 switch(k%7)
 {
  case 0:
   cout<<"SUN";
   break;
  case 1:
   cout<<"MON";
   break;
  case 2:
   cout<<"TUE";
   break;
  case 3:
   cout<<"WED";
   break;
  case 4:
   cout<<"THU";
   break;
  case 5:
   cout<<"FRI";
   break;
  case 6:
   cout<<"SAT";
   break;
 }
}