Rectangle frog has a piece of paper divided into nn rows and mm columns. Today, she would like to draw a rectangle whose perimeter is not greater than kk. There are 88 (out of 99) ways when n=m=2,k=6n=m=2,k=6 Find the number of ways of drawing. Input…

Vertex Cover frog has a graph with nn vertices v(1),v(2),…,v(n)v(1),v(2),…,v(n) and mm edges (v(a1),v(b1)),(v(a2),v(b2)),…,(v(am),v(bm))(v(a1),v(b1)),(v(a2),v(b2)),…,(v(am),v(bm)). She would like to color some vertices so that each edge has at least…

Travel The country frog lives in has nn towns which are conveniently numbered by 1,2,…,n1,2,…,n. Among n(n−1)2n(n−1)2 pairs of towns, mm of them are connected by bidirectional highway, which needs aa minutes to travel. The other pairs are connected b…

Censor frog is now a editor to censor so-called sensitive words (敏感词). She has a long text pp. Her job is relatively simple -- just to find the first occurence of sensitive word ww and remove it. frog repeats over and over again. Help her do the tedi…

10396: H.Rectangles Time Limit: 2 Sec  Memory Limit: 128 MB Submit: 229  Solved: 33 [Submit][Status][Web Board] Description Given N (4 <= N <= 100)  rectangles and the lengths of their sides ( integers in the range 1..1,000), write a program that fi…

Memory Leak Time Limit: 2000MS Memory limit: 131072K 题目描述 Memory Leak is a well-known kind of bug in C/C++. When a string is longer than expected, it will visit the memory of next array which will cause the issue and leak some information. You can se…

Reversed Words Time Limit: 2000MS Memory limit: 131072K 题目描述 Some aliens are learning English. They have a very strange way in writing that they revered every word in the sentence but keep all the words in common order. For example when they want to…

Triple Nim Time Limit: 2000MS Memory limit: 65536K 题目描述 Alice and Bob are always playing all kinds of Nim games and Alice always goes first. Here is the rule of Nim game: There are some distinct heaps of stones. On each turn, two players should remov…

The Binding of Isaac Time Limit: 2000MS Memory limit: 65536K 题目描述 Ok, now I will introduce this game to you... Isaac is trapped in a maze which has many common rooms- Like this-There are 9 common rooms on the map. And there is only one super-secret r…

Fibonacci Time Limit: 2000MS Memory limit: 131072K 题目描述 Fibonacci numbers are well-known as follow: Now given an integer N, please find out whether N can be represented as the sum of several Fibonacci numbers in such a way that the sum does not inclu…