Code Force 21B Intersection

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Code Force 21B Intersection

B. Intersection time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output You are given two set of points. The first set is determined by the equation A1x + B1y + C1 = 0, and the second one is determined…

pycharm debug后会出现 step over /step into/step into my code /force step into /step out 分别表示

1.debug,全部打印 2.打断点debug,出现单步调试等按钮,只运行断点前 3.setup over 调试一行代码 4.setup out 运行断点后面所有代码 5.debug窗口显示调试按钮 6.运行到对应的点会显示变量的值 7.step into:单步执行,遇到子函数就进入并且继续单步执行(简而言之,进入子函数): step over:在单步执行时,在函数内遇到子函数时不会进入子函数内单步执行,而是将子函数整个执行完再停止,也就是把子函数整个作为一步.有一点,经过我们简单的调试,在不存…

【Code Force】Round #589 (Div. 2) D、Complete Tripartite

题目链接大致题意把一个图分成三块,要求任意两块之间是完全图,块内部没有连线分析首先根据块内没有连线可以直接分成两块假定点1是属于块1的,那么所有与点1连接的点,都不属于块1:反之则是块1的然后在所有不属于块1的点内随意找一点k,设定其属于块2,那么所有与点k连接的点且不属于块1,则是块3. 块分完了,然后是判断每个块是否满足条件,我通过下面三条来判断 1.每个块都有点 2.每个块内部没有连线,即没有一条线的两个端点在同一个块内 3.每个块内的点的度等于其他两个块的点个数和也等于n减去…

code force 424 A - Office Keys

There are n people and k keys on a straight line. Every person wants to get to the office which is located on the line as well. To do that, he needs to reach some point with a key, take the key and then go to the office. Once a key is taken by somebo…

code force 403C.C. Andryusha and Colored Balloons

C. Andryusha and Colored Balloons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Andryusha goes through a park each day. The squares and paths between them look boring to Andryusha, so he…

code force 403B.B. The Meeting Place Cannot Be Changed

B. The Meeting Place Cannot Be Changed time limit per test 5 seconds memory limit per test 256 megabytes input standard input output standard output The main road in Bytecity is a straight line from south to north. Conveniently, there are coordinates…

code force 401B. Game of Credit Cards

B. Game of Credit Cards time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output After the fourth season Sherlock and Moriary have realized the whole foolishness of the battle between them and deci…