pku1250.cpp

这是ACM 方面的资料 是PKU的 北京大学的出来的

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

void check(int n, char *s)
{
	char p[30];
	int end, i, j, k, un, l;
	l = strlen(s);
	for (i = 0; i < 30; i++)
	{
		p[i] = 0;	
	}
	
	for (i = 0, un =0; i < l; i++)
	{
		for (j = 0, k = 0; j < l && p[j] != 0 && p[j] != s[i]; j++)
		{
			if(p[j] != 1) k++;	
		}
		if (p[j] == 0)
		{
			p[j] = s[i];	
		}
		else
		{
			p[j] = 1;
			k++;	
			if(k > n) un++;
		}
	}
	if (un == 0)
	{
		printf("All customers tanned successfully.\n");	
	}else
	{
		printf("%d customer(s) walked away.\n",un);
	}
}


int main()
{
	int n;
	char s[60];
	while(scanf("%d", &n) != -1 && n != 0)
	{
		scanf("%s", s);
		check(n, s);	
	}
	return 0;
}