//采用暴力的方法做的,可惜时间不够了,给的例子通过了,不知道还有没有什么问题。仅供参考 #define _CRT_SECURE_NO_WARNINGS // #define STDIN_OUT #include<cstdio> #include<iostream> #include<vector> #include<algorithm> #include<queue> #include<stack> #include<string> #include<string.h> #include<map> #include<cmath> #include<deque> #include<unordered_map> using namespace std; class Solution { public: int lcs(vector<int> str1,vector<int> str2) { int len1 = str1.size(); int len2 = str2.size(); vector<vector<int>> a(len1+1,vector<int>(len2+1,0)); int n_max = 0; for(int i = 0; i < len1; i++) a[i][0] = 0; for(int j = 0; j < len2; j++) a[0][j] = 0; for(int i = 1; i <= len1; i++){ for(int j = 1; j <= len2; j++){ if(str1[i-1] == str2[j-1]) a[i][j] = a[i-1][j-1] + 1; else{ a[i][j] = max(a[i-1][j],a[i][j-1]); } n_max = max(n_max,a[i][j]); } } return n_max; } void dfs(int n, int k, int start, int cur,vector<int> path, vector<vector<int>> &res){ if(cur == k){ res.push_back(path); return; } if(cur < k) for(int i = start; i <= n; i++){ path.push_back(i); dfs(n,k,start,cur+1,path,res); path.pop_back(); } } vector<vector<int>> combine(int start,int end, int k) {//所有的排列组合 vector<vector<int>> res; vector<int> path; dfs(end,k,start,0,path,res); return res; } }; int main() { #ifdef STDIN_OUT freopen("D:\\input.txt", "r", stdin); freopen("D:\\output.txt", "w", stdout); #endif int m,n,L,R,k; vector<int> str1; Solution s; cin>>n>>m; cin>>k; cin>>L>>R; for(int i = 0; i < n;i++) { int val; cin>>val; str1.push_back(val); } vector<vector<int>> res = s.combine(L,R,m); int count = 0; for(auto re : res){ int LCIS = s.lcs(str1,re); if(LCIS >= k) count = (count + 1) % 10007; } cout<<count<<endl; #ifdef STDIN_OUT fclose(stdin); fclose(stdout); #endif return 0; }