24 lines
351 B
C++
24 lines
351 B
C++
#include <bits/stdc++.h>
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using namespace std;
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//用例：
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/*
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20
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输出：
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10946
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*/
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const int N = 110;
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int f[N];
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int n;
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int solve() {
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f[0] = 1, f[1] = 2;
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for (int i = 2; i < n; i++)
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f[i] = f[i - 1] + f[i - 2];
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return f[n - 1];
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}
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int main() {
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scanf("%d", &n);
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printf("%d\n", solve());
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return 0;
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} |