HDU-1058 堆

输出的格式要注意一下，看了DISCUSS才AC。

/*
 * hdu-1058 humnle numbers
 * mike-w
 * 2012-5-20
 */
#include<stdio.h>
#include<stdlib.h>

#define MAX_N 6543
#define MAX_HEAP_SIZE 100000
#define UPPER 2000000008

__int64 humble[MAX_N];
__int64 heap[MAX_HEAP_SIZE];
int heap_size;
int n;

int swap(__int64 *e1,__int64 *e2)
{
	__int64 t=*e1;
	*e1=*e2;
	*e2=t;
	return 0;
}

int heap_in(__int64 e)
{
	if(heap_size==MAX_HEAP_SIZE)
		return -1;
	heap[++heap_size]=e;
	__int64 p,x;
	x=heap_size;
	p=x/2;
	while(p && heap[x]<heap[p])
	{
		swap(heap+x,heap+p);
		x=p;
		p=x/2;
	}
	return 0;
}

int heap_out(__int64 *e)
{
	if(heap_size==0)
		return -1;
	*e=heap[1];
	swap(heap+1,heap+heap_size);
	heap_size--;
	__int64  x,p,lc,rc;
	p=1;
	while(1)
	{
		lc=2*p;
		rc=lc+1;
		x=p;
		if(lc<=heap_size && heap[lc]<heap[x])
			x=lc;
		if(rc<=heap_size && heap[rc]<heap[x])
			x=rc;
		if(x==p)
			break;
		swap(heap+x,heap+p);
		p=x;
	}
	return 0;
}

int init(void)
{
	heap_in(1);
	int cnt=0,ret;
	__int64 e;
	while(cnt<MAX_N)
	{
		while(!(ret=heap_out(&e))&&e==humble[cnt])
			;
		if(ret)
			break;
		humble[++cnt]=e;
		heap_in(2*e);
		heap_in(3*e);
		heap_in(5*e);
		heap_in(7*e);
	}
	return 0;
}

int main(void)
{
#ifndef ONLINE_JUDGE
	freopen("in","r",stdin);
#endif
	int e;
	init();
	while(scanf("%d",&e),e)
	{
		printf("The %d",e);
		if(e%10==1 && e%100!=11)
			printf("st");
		else if(e%10==2 && e%100!=12)
			printf("nd");
		else if(e%10==3 && e%100!=13)
			printf("rd");
		else
			printf("th");
		printf(" humble number is %I64d.\n",humble[e]);
	}
	return 0;
}