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24 lines
509 B
24 lines
509 B
#include <bits/stdc++.h>
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using namespace std;
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// 原题目: https://blog.csdn.net/weixin_45485719/article/details/103219960
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int dp(int n) {
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if (n == 2) return 2;
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if (n == 3) return 3;
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return dp(n - 1) + dp(n - 2);
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}
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const int N = 110;
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int f[N];
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int main() {
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int n;
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scanf("%d", &n);
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//递归
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printf("%d\n", dp(n));
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//递推
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f[2] = 2, f[3] = 3;
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for (int i = 4; i <= n; i++) f[i] = f[i - 1] + f[i - 2];
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printf("%d\n", f[n]);
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return 0;
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}
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