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Ikko Eltociear Ashimine
954c45864b
* docs: add Japanese documents (`ja/docs`) * docs: add Japanese documents (`ja/codes`) * docs: add Japanese documents * Remove pythontutor blocks in ja/ * Add an empty at the end of each markdown file. * Add the missing figures (use the English version temporarily). * Add index.md for Japanese version. * Add index.html for Japanese version. * Add missing index.assets * Fix backtracking_algorithm.md for Japanese version. * Add avatar_eltociear.jpg. Fix image links on the Japanese landing page. * Add the Japanese banner. --------- Co-authored-by: krahets <krahets@163.com>
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
/**
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* File: climbing_stairs_backtrack.cpp
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* Created Time: 2023-06-30
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* Author: krahets (krahets@163.com)
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*/
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#include "../utils/common.hpp"
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/* バックトラッキング */
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void backtrack(vector<int> &choices, int state, int n, vector<int> &res) {
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// n段目に到達したとき、解の数に1を加える
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if (state == n)
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res[0]++;
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// すべての選択肢を走査
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for (auto &choice : choices) {
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// 剪定：n段を超えて登ることを許可しない
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if (state + choice > n)
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continue;
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// 試行：選択を行い、状態を更新
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backtrack(choices, state + choice, n, res);
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// 撤回
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}
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}
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/* 階段登り：バックトラッキング */
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int climbingStairsBacktrack(int n) {
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vector<int> choices = {1, 2}; // 1段または2段登ることを選択可能
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int state = 0; // 0段目から登り始める
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vector<int> res = {0}; // res[0] を使用して解の数を記録
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backtrack(choices, state, n, res);
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return res[0];
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}
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/* ドライバーコード */
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int main() {
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int n = 9;
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int res = climbingStairsBacktrack(n);
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cout << n << "段の階段を登る解は" << res << "通りです" << endl;
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return 0;
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} |