解题思路:
注意事项:
使用next_permutation前记得从小到大排序,之后的循环使用do-while循环,否则会漏掉第一次匹配
参考代码:
#define _CRT_SECURE_NO_WARNINGS #include <iostream> #include <algorithm> #include <string> #include <stdio.h> #include <vector> using namespace std; vector<int> arr; bool cmp(char a, char b) { return a < b; } int solve(string& str, vector<string>& passList) { int times = 0; for (vector<string>::iterator it = passList.begin(); it < passList.end(); it++) { string curPass = *it; sort(curPass.begin(), curPass.end(), cmp); do { int curIndex = 0; while ((curIndex = str.find(curPass, curIndex)) != string::npos) { times += 1; curIndex += 1; if (curIndex >= curPass.length()) break; } } while (next_permutation(curPass.begin(), curPass.end())); } return times; } int main(void) { string str; cin >> str; int n = 0; cin >> n; vector<string> passList; for (int i = 1; i <= n; i++) { string pass; cin >> pass; passList.push_back(pass); } cout << solve(str, passList) << endl; return 0; }
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