Proving Equivalences Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9208 Accepted Submission(s): 3257 Problem Description Consider the following exercise, found in a generic linear algebra t…
Consider the following exercise, found in a generic linear algebra textbook. Let A be an n × n matrix. Prove that the following statements are equivalent: 1. A is invertible. 2. Ax = b has exactly one solution for every n × 1 matrix b. 3. Ax = b is c…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2767 题意:问最少加多少边可以让所有点都相互连通. 题解:如果强连通分量就1个直接输出0,否者输出入度为0的缩点,出度为0的缩点和的最大值 #include <iostream> #include <cstring> #include <cstdio> using namespace std; const int N = 2e4 + 10; const int M = 5e…
pid=2767">http://acm.hdu.edu.cn/showproblem.php?pid=2767 Proving Equivalences Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2926 Accepted Submission(s): 1100 Problem Description Conside…
Proving Equivalences Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 9296 Accepted Submission(s): 3281 Problem Description Consider the following exercise, found in a generic linear algebra t…
Proving Equivalences Time Limit : 4000/2000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other) Total Submission(s) : 3 Accepted Submission(s) : 1 Font: Times New Roman | Verdana | Georgia Font Size: ← → Problem Description Consider the follo…
Proving Equivalences Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4263 Accepted Submission(s): 1510 Problem Description Consider the following exercise, found in a generic linear algebra t…
