题解 | #斐波那契数列#
斐波那契数列
https://www.nowcoder.com/practice/ee5d403c1172487f8c7915b3c3d924c6
#include <iostream>
using namespace std;
int main()
{
int n = 0;
cin >> n;
int a1 = 1;
int a2 = 1;
int a3 = 1;
for (int i = 3; i <= n; i++)
{
a3 = a1 + a2;
a1 = a2;
a2 = a3;
}
cout << a3 << endl;
return 0;
}
// 64 位输出请用 printf("%lld")
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