1009 - Sum the K-th
Time Limit : 3 Second
Memory Limit : 128 MB
Submission: 112
Solved: 38
- Description
- N integers are arranged on a circle clockwise. Given two integers M and K. For each position, you should take M continuous integers on the left and M continuous integers on the right. Take out the K-th number of the 2M integers. Then you will get N integers. Add all the integers up and tell me the sum. If the answer is not smaller than 1,000,000,007, divide it by 1,000,000,007 and tell me the remainder.
- Input
- There is an Integer T in the first line. Which means the number of test cases in the input file. Then followed by T test cases.
For each test case, in the first line there are 3 Integers N(5<=N<=100,000),M(0<M*2<N),K(0<K<2*M). Then there are N Integers, all the integers are non-negative Integers and smaller than 1,000,000,000.
- Output
- For each test case, output the answer for a line.
- sample input
-
2 5 2 2 1 2 3 4 5 5 1 2 1 2 3 4 5
- sample output
-
12 21
- hint
- source
- Sempr|CrazyBird|hust07p43