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H1001. 【模板】字典树 1 [50' Code]
https://hydro.ac/record/6158016697ec9cde15d81974
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Hydro/H1001/H1001.cpp
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48
Hydro/H1001/H1001.cpp
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#include <bits/stdc++.h>
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using namespace std;
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struct node {
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int size;
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node* next[26];
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~node() {
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for (auto& i : next) {
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delete i;
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}
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}
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};
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void insert(node* root, string s) {
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if (s.empty()) {
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root->size = 1;
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return;
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}
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if (root->next[s[0] - 'a'] == nullptr) root->next[s[0] - 'a'] = new node();
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insert(root->next[s[0] - 'a'], s.substr(1));
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}
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void calcsize(node* root) {
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for (int i = 0; i < 26; i++) {
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if (root->next[i] != nullptr) {
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calcsize(root->next[i]);
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root->size += root->next[i]->size;
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}
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}
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}
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int main() {
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std::ios::sync_with_stdio(false);
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int n;
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string s;
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node* root = new node();
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cin >> n;
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while (n--) {
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cin >> s;
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insert(root, s);
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}
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calcsize(root);
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cout << root->size << endl;
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delete root;
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return 0;
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}
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