[UVA] 12019 - Doom's Day Algorithm

題意:
輸入一個日期，
輸出在2011年該日期是星期幾

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/* 20150930
 * hanting
 * UVa 12019 - Doom's Day Algorithm
 * C++
 */
#include <iostream>
using namespace std;
#define YearID(x) ((x-2000)/4+(x-2000))
int main()
{
    int caseN;
    cin>>caseN;
    string Day[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
    int MonID[]={0,6,2,2,5,0,3,5,1,4,6,2,4};
    while(caseN--)
    {
        int mon,date;
        cin>>mon>>date;
        int ans=(YearID(2011)+ MonID[mon] + date )%7;
        cout<<Day[ans]<<endl;
    }

    return 0;
}