View Code of Problem 23

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

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