View Code of Problem 23

#include <stdio.h>
main(){
	int m,i,a[90];
	a[0] = 1;a[1] =2;
	for(i = 2;i<90;i++)
		a[i] = a[i-1]+a[i-2];
	while(scanf("%d",&m)!=EOF){
		if(m == 0)
			break;
		printf("%d\n",a[m-1]);
	}
	return 0;
}