24 lines
300 B
C++
24 lines
300 B
C++
#include <bits/stdc++.h>
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#include <vector>
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using namespace std;
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int main(void) {
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int n, n1 = 0, n2 = 1, ret = 2;
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scanf("%d", &n);
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if (n < 3) {
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printf("%d\n", n);
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}
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else {
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for (int i = 2; i < n; i++) {
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n1 = n2;
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n2 = ret;
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ret = n1 + n2;
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}
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printf("%d\n", ret);
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}
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return 0;
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} |