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1a3b819355
* Update vector.h 增加功能列表: 获取向量的第 i 个元素 设置向量的第 i 个元素 向量扩容 向量缩容 向量插入元素 向量删除元素 向量交换元素 向量是否为空 向量是否已满 向量是否相等 对向量内部进行排序(升序/降序) 对向量某段数据排序(升序/降序) * Create hanota.c * 新增binary_search_recur.c * Update vector.h * Delete codes/c/chapter_divide_and_conquer directory * Update vector.h * Create binary_search_recur.c * Delete codes/chapter_divide_and_conquer directory * Update vector.h * Create climbing_stairs_constraint_dp.c * RollBack vector.h * Create CMakeLists.txt --------- Co-authored-by: Yudong Jin <krahets@163.com>
38 lines
901 B
C
38 lines
901 B
C
/**
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* File: climbing_stairs_constraint_dp.c
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* Created Time: 2023-10-02
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* Author: Zuoxun (845242523@qq.com)
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*/
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#include "../utils/common.h"
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/* 带约束爬楼梯:动态规划 */
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int climbingStairsConstraintDP(int n) {
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if (n == 1 || n == 2) {
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return 1;
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}
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// 初始化 dp 表,用于存储子问题的解
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int dp[n + 1][3];
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memset(dp, 0, sizeof(dp));
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// 初始状态:预设最小子问题的解
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dp[1][1] = 1;
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dp[1][2] = 0;
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dp[2][1] = 0;
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dp[2][2] = 1;
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// 状态转移:从较小子问题逐步求解较大子问题
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for (int i = 3; i <= n; i++) {
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dp[i][1] = dp[i - 1][2];
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dp[i][2] = dp[i - 2][1] + dp[i - 2][2];
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}
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return dp[n][1] + dp[n][2];
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}
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/* Driver Code */
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int main() {
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int n = 9;
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int res = climbingStairsConstraintDP(n);
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printf("爬 %d 阶楼梯共有 %d 种方案\n", n, res);
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return 0;
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}
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