View Code of Problem 23

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