题解 | #跳台阶#
跳台阶
https://www.nowcoder.com/practice/bfb2a2b3cdbd4bd6bba0d4dca69aa3f0
#include <stdio.h>
int cal(int n){
if(n < 0){
return -1;
}
return n <= 1 ? 1 : cal(n-1) + cal(n-2);
}
int main() {
int a; //2;
scanf("%d", &a);
printf("%d", cal(a));
return 0;
}
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