摘要： River polution control is a major challenge that authorities face in order to ensure future clean water su... 阅读全文

摘要： //import java.util.Scanner;//相当于输入输出头文件import java.util.*;//啥都有头文件//import java.math.BigInteger;//大数类impor... 阅读全文

摘要： Fractions in octal (base 8) notation can be expressed exactly in decimal notation. For example, 0.75 in oc... 阅读全文

摘要： Once upon a time there lived a good fairy A. One day a fine young man B came to her and asked to predict h... 阅读全文

摘要： 判断一个二分图的充要条件就是没有奇数环我们可以根据该图中是否存在奇数环来判定该图是否可以构成二分图其实只要把二分图想象成是一个染色问题同一条边的两个点不为同种颜色 就不难证明没有奇数环是构成二分图的充分必要条件 ... 阅读全文

摘要： FJ's cows really hate getting wet so much that the mere thought of getting caught in the rain makes them s... 阅读全文

摘要： The city executive board in Lund wants to construct a sightseeing tour by bus in Lund, so that tourists ca... 阅读全文

摘要： 欧拉通路 欧拉回路的区别 及其判定在做一些图类时经常要用到欧拉路，比如近期的单词连接和涂彩棒等，下面整理了一点：欧拉通路: 通过图中每条边且只通过一次，并且经过每一顶点的通路。欧拉回路: 通过图中每条边且只通过一... 阅读全文

摘要： In a kindergarten, there are a lot of kids. All girls of the kids know each other and all boys also know e... 阅读全文

摘要： Give you three integers n, A and B. Then we define S i = A i mod B and T i = Min{ S k| i-A = 1} Your task ... 阅读全文