C-Popcorn思路：从集合S中选出非空子集，使得子集中糖果口味有M种。观察到集合S中的元素数量n<=10。因此，总共的子集数为C<=2^10-1，考虑枚举所有的子集。代码：#include<bits/stdc++.h>#defineintlonglong#defineullunsignedlonglong#defineiosios::sync_with_s

文章目录前言web351web352web353web354web355web356web357web358前言ctfshow的web入门的ssrf靶场web351<?phperror_reporting(0);highlight_file(__FILE__);$url=$_POST['url'];$ch=curl_init($url);curl_setopt($ch,CURLOPT_HEADER,0);curl_setopt($ch,

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dp[i][j]表示前i个和为j的个数。那么就有递推式dp[i][j]+=dp[i][j-x]*c(j,j-x);其中x满足从0到c[i],并且x满足<=j组合数递推公式c(n,k)=c(n,k-1)+c(n,k);importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStreamReader;impor