範例程式碼 uva151

//uva151
#include <stdio.h>
#include <stdlib.h>

int find(int n,int m) {
	int in[100], last, c, i, k;
	for(i = 0; i < 100; i++)
	in[i] = 0;

	for(i = 1, k = m, c = 0; c < n;) {
		if(!in[i] && i <= n) {
			if(k == m) {
				last = i;
				c++;
				k = in[i] = 1;
			}
			else {
				i++;
				k++;
			}
		}
		else {
			i++;
			if(i > n)
				i = 1;
		}
	}

	if(last == 13)
		return 1;
	return 0;
}

int main()
{
	int n,m;
	while(scanf("%d", &n) == 1 && n != 0) {
		for(m = 1; ; m++)
			if(find(n, m)) {
				printf("%d\n", m);
				break;
			}
	}
	return 0;
}