题解 | #统计每个月兔子的总数#
统计每个月兔子的总数
https://www.nowcoder.com/practice/1221ec77125d4370833fd3ad5ba72395
#include <iostream>
using namespace std;
int main() {
int n, n_0, n_1, n_2, sum;
cin >> n;
n_0 = 0;
n_1 = 0;
n_2 = 1;
for (int i = 3; i <= n; ++i){
n_2 = n_2 + n_1;
n_1 = n_0;
n_0 = n_2;
}
sum = n_0 + n_1 + n_2;
cout << sum << endl;
return 0;
}
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