算法设计与分析实训课 矩阵连乘 动态规划表构建: dp[i][j] 表示从第i个矩阵到第j个矩阵的最小连乘次数。 best_k[i][j] 记录了在计算dp[i][j]时选择的k值,即(i, k)和(k+1, j)是最佳分割点。 初始化: 对于所有长度为1的子序列(即单个矩阵),它们的连乘次数为0,因此dp[i][i]=0。 填充动态规划表: 使用双重循环遍历所有可能的矩阵链长度(len=2到n)。 对于每一个 2025-01-08 #算法设计与分析
Codeforces Round 934 (Div. 2)A. Destroying Bridges Codeforces Round 934 (Div. 2) A. Destroying Bridges 123456789101112131415161718#include<bits/stdc++.h>using namespace std;int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); 2024-10-21 Codeforces #Codeforces Round 934 (Div. 2)
Codeforces Round 934 (Div. 2) B. Equal XOR Codeforces Round 934 (Div. 2) B. Equal XOR 测试案例解释有误导性,异或运算,相同数字异或为0,每个数字都出现两次,不是两个都在一边,就是一边一个,只需要分开来输出即可 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152 2024-10-21 Codeforces #Codeforces Round 934 (Div. 2)
Codeforces Round 934 (Div. 2) C. MEX Game 1 Codeforces Round 934 (Div. 2) C. MEX Game 1 123456789101112131415161718192021222324252627282930313233343536373839404142434445#include<bits/stdc++.h>using namespace std;const int Max=1e6;int g[Ma 2024-10-21 Codeforces #Codeforces Round 934 (Div. 2)
Codeforces Round 936 (Div. 2) A. Median of an Array Codeforces Round 936 (Div. 2) A. Median of an Array 中位数被定义为排序数组中索引 $\lceil \frac{n}{2} \rceil$ 处的数字,因此我们可以对数组进行排序并加以处理。 因此,我们先对数组进行排序,找出数组中的中位数,即数字 $a_{\lceil \frac{n}{2} \rceil}$ ,让它等于 $x$ 。为了使中位数增加, 2024-10-21 Codeforces #Codeforces Round 936 (Div. 2)
Codeforces Round 936 (Div. 2) B. Maximum Sum Codeforces Round 936 (Div. 2) B. Maximum Sum 先求最大连续子列,后面最大连续子列多次加到原数组的和中,$max+max2+max3+…+sum$,类似这样 123456789101112131415161718192021222324252627282930313233343536373839404142#include <bits/stdc++. 2024-10-21 Codeforces #Codeforces Round 936 (Div. 2)
Codeforces Round 937 (Div. 4) A. Stair, Peak, or Neither? Codeforces Round 937 (Div. 4) A. Stair, Peak, or Neither? 签到题,判断大小即可 代码: 1234567891011121314151617181920212223242526272829// By SnowDream#include<bits/stdc++.h>using namespace std;typedef long l 2024-10-21 Codeforces #Codeforces Round 937 (Div. 4)
Codeforces Round 937 (Div. 4) B. Upscaling Codeforces Round 937 (Div. 4) B. Upscaling ..,##交替输出两次即可 1234567891011121314151617181920212223242526272829303132// By SnowDream#include<bits/stdc++.h>using namespace std;typedef long long ll;con 2024-10-21 Codeforces #Codeforces Round 937 (Div. 4)
Codeforces Round 937 (Div. 4) C. Clock Conversion Codeforces Round 937 (Div. 4) C. Clock Conversion 代码: 12345678910111213141516171819202122232425262728293031323334// By SnowDream#include<bits/stdc++.h>using namespace std;typedef long long ll;co 2024-10-21 Codeforces #Codeforces Round 937 (Div. 4)
Codeforces Round 937 (Div. 4) D. Product of Binary Decimals Codeforces Round 937 (Div. 4) D. Product of Binary Decimals 本人使用了朴实无华的打表,从最大的开始代入遍历 代码: 123456789101112131415161718192021222324252627282930313233343536373839404142434445// By SnowDream#include<bits 2024-10-21 Codeforces #Codeforces Round 937 (Div. 4)