View Code of Problem 23

#include<stdio.h>
#include<string.h>

int main()
{
    int m,i;
    long long int a[100];
    while(scanf("%d",&m)!=EOF&&m!=0&&m<=90){
    	a[0]=1;a[1]=2;
    	for(i=2;i<90;i++){
    		a[i]=a[i-1]+a[i-2];
    	}
    	printf("%lld\n",a[m-1] );

    }

    return 0;
}