View Code of Problem 23

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