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29 lines
571 B
Kotlin
29 lines
571 B
Kotlin
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/**
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* File: climbing_stairs_dfs.kt
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* Created Time: 2024-01-25
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* Author: curtishd (1023632660@qq.com)
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*/
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package chapter_dynamic_programming
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/* 搜尋 */
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fun dfs(i: Int): Int {
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// 已知 dp[1] 和 dp[2] ，返回之
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if (i == 1 || i == 2) return i
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// dp[i] = dp[i-1] + dp[i-2]
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val count = dfs(i - 1) + dfs(i - 2)
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return count
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}
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/* 爬樓梯：搜尋 */
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fun climbingStairsDFS(n: Int): Int {
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return dfs(n)
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}
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/* Driver Code */
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fun main() {
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val n = 9
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val res = climbingStairsDFS(n)
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println("爬 $n 階樓梯共有 $res 種方案")
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}
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