zoj3785 What day is that day?

It's Saturday today, what day is it after 1¹ + 2² + 3³ + ... + N^N days?

Input

There are multiple test cases. The first line of input contains an integer T indicating the number of test cases. For each test case:

There is only one line containing one integer N (1 <= N <= 1000000000).

Output

For each test case, output one string indicating the day of week.

Sample Input

Sample Output

Sunday

Thursday

Hint

A week consists of Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday.

题目大意：今天是星期六，输入n，问1¹ + 2² + 3³ + ... + N^N天后是星期几？

思路：因为n是10亿，解法必定是数学方法或者找规律。注意到7是素数，所以可以使用费马小定理进行简化。即当p是素数是，a^(p-1) mod p=1，简化后发现每42个数就会出现一个循环，得数mod7=6。所以求解过程就是先求出n由几个42组成，对于42取余的剩下的部分就可以直接模拟做了。

 /*

  * Author:  Joshua

  * Created Time:  2014/5/17 13:18:55

  * File Name: j.cpp

  */

 #include<cstdio>

 #include<iostream>

 #include<cstring>

 #include<cstdlib>

 #include<cmath>

 #include<algorithm>

 #include<string>

 #include<map>

 #include<set>

 #include<vector>

 #include<queue>

 #include<stack>

 #include<ctime>

 #include<utility>

 #define M0(x) memset(x, 0, sizeof(x))

 #define MP make_pair

 #define Fi first

 #define Se second

 #define rep(i, a, b) for (int i = (a); i <= (b); ++i)

 #define red(i, a, b) for (int i = (a); i >= (b); --i)

 #define PB push_back

 #define Inf 0x3fffffff

 #define eps 1e-8

 typedef long long LL;

 using namespace std;

 string ans[]={"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"};

 void solve()

 {

     int n,m,t=,temp;

     scanf("%d",&n);

     m=n/;

     t=(t+m*)%;

     for (int i=;i<=n%;i++)

     {

       temp=;

       for (int j=;j<=i;j++)

         temp=(temp*i)%;

         t=(t+temp)%;

     }

     cout<<ans[t]<<endl;

 }

 int main()

 {

     int tt;

     scanf("%d",&tt);

     while (tt)

     {

         tt--;

         solve();

     }

     return ;

 }

许久没写了，代码太丑，大家凑合着看。。。

巴特西