区间选点问题,即数轴上有n个闭区间[l1i, ri],取尽量少的点,使得每个区间内都至少有一个点. The Department of Recreation has decided that it must be more profitable, and it wants to sell advertising space along a popular jogging path at a local park. They have built a number of billboards (s
Super Mario Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4090 Accepted Submission(s): 1883 Problem Description Mario is world-famous plumber. His “burly” figure and amazing jumping ability
这一周的作业,刚压线写完.Problem3 没有写,不想证明了.从Problem 9 开始一直到最后难度都挺大的,我是在论坛上看过了别人的讨论才写出来的,挣扎了很久. Problem 9在给定的基上分解向量,里面调用了hw4的一些函数,通过solve函数获得矩阵方程的解 Problem 10判断矩阵是不是可逆的,注意判断矩阵是不是square的 Problem 11和Problem 12 都是求逆,也是解方程,只是函数的参数需要参考一下源码 发现一个有趣的事情,Coding the Matrix