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33 lines
618 B
33 lines
618 B
/**
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* File: climbing_stairs_dfs.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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/* Search */
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int dfs(int i) {
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// Known dp[1] and dp[2], return them
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if (i == 1 || i == 2)
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return i;
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// dp[i] = dp[i-1] + dp[i-2]
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int count = dfs(i - 1) + dfs(i - 2);
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return count;
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}
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/* Climbing stairs: Search */
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int climbingStairsDFS(int n) {
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return dfs(n);
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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 = climbingStairsDFS(n);
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cout << "There are " << res << " solutions to climb " << n << " stairs" << endl;
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return 0;
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}
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