题解 | #小乐乐走台阶#
小乐乐走台阶
https://www.nowcoder.com/practice/ebf04de0e02c486099d78b7c3aaec255
#include <stdio.h>
int num(int a)
{
if(a==1) return 1;
if(a==2) return 2;
else return num(a-1)+num(a-2);
}
int main() {
int a;
scanf("%d", &a);
printf("%d",num(a));
return 0;
}
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