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Farmer John has been informed of the location of a fugitive cow and wants to catch her immediately. He starts at a point N (0 ≤ N ≤ 100,000) on a number line and the cow is at a point K (0 ≤ K ≤ 100,0

You are given two pots, having the volume of A and B liters respectively. The following operations can be performed:FILL(i)        fill the pot i (1 ≤ i ≤ 2) from the tap;DROP(i)      empty the po

问题 B: 完美序列时间限制: 1 Sec  内存限制: 128 MB提交: 29  解决: 18[提交][状态][讨论版]题目描述已知一个长度为l的序列：b1，b2，b3，…，bl (1输入输入的第一行为一个正整数T (T每组测试数据包含两个正整数n，l (1输出对于每组测试数据，输出一行包含一个整数，代表答案对1000000007取余