题解 | #Fibonacci#
Fibonacci
https://www.nowcoder.com/practice/17ad6908e36a49f4b06ea96936e8bb25
#include "cstdio"
#include <cstdio>
using namespace std;
int main(){
int n;
scanf("%d",&n);
int a=0,b=1;
for(int i=2;i<=n;i=i+2){
a=a+b;
b=a+b;
}
if(n%2==0) printf("%d",a);
else printf("%d",b);
}
