#include<stdio.h> #include<string.h> #include<math.h> int main(){ int a[50]={1,2}; for(int i=2;i<50;i++)a[i]=a[i-1]+a[i-2]; int b; while(scanf("%d",&b)!=EOF) { if(b==0)return 0; printf("%d",a[b-1]); } } |
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