#include<stdio.h> int main() { int m,a[100]; a[0]=0; a[1]=1; while(scanf("%d",&m)!=EOF) { if(m==0) break; for(int i=2; i<=m+1; i++) { a[i]=a[i-1]+a[i-2]; } printf("%d\n",a[m+1]); } }
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