2014年百度之星程序设计大赛 - 初赛（第二轮）

1001

暴力

#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;
const int maxn = 100100;
int ll[maxn], rr[maxn];
struct node
{
	int x, y, bj;
}e[maxn];


int main()
{
	int cas = 1;
	int T;
	scanf("%d", &T);
	int n;
	while(T--)
	{
		scanf("%d", &n);
		for(int i = 1; i <= n; i++)
		{
			scanf("%d %d", &e[i].x, &e[i].y);
			if(e[i].y == 0)
				e[i].bj = 0;
			else
				e[i].bj = 1;
			//c[i] = e[i].y;
		}
		int now = -1;
		for(int i = 1; i <= n; i++)
		{
			if(e[i].y != 0)
				now = i;
			ll[i] = now;
		}
		now = -1;
		for(int i = n; i >= 1; i--)
		{
			if(e[i].y != 0)
				now = i;
			rr[i] = now;
		}
		for(int i = 1; i <= n; i++)
		{
			if(e[i].bj == 0)
			{
				if(ll[i] != -1 && rr[i] != -1)
				{
					int s1 = abs(e[i].x - e[ll[i]].x);
					int s2 = abs(e[i].x - e[rr[i]].x);
					if(s1 > s2)
						e[i].y = e[rr[i]].y;
					else if(s1 < s2)
						e[i].y = e[ll[i]].y;
					else
					{
						if(e[ll[i]].y > e[rr[i]].y)
							e[i].y = e[ll[i]].y;
						else
							e[i].y = e[rr[i]].y;
					}
				}
				else if(ll[i] != -1)
				{
					e[i].y = e[ll[i]].y;
				}
				else
				{
					e[i].y = e[rr[i]].y;
				}
			}
		}
		int m;
		scanf("%d", &m);
		printf("Case #%d:\n", cas++);
		while(m--)
		{
			char str[10];
			scanf("%s", str);
			if(str[0] == 'Q')
			{
				for(int i = 1; i <= n; i++)
				{
					if(e[i].bj == 0)
					{
						if(ll[i] != -1 && rr[i] != -1)
						{
							int s1 = abs(e[i].x - e[ll[i]].x);
							int s2 = abs(e[i].x - e[rr[i]].x);
							if(s1 > s2)
								e[i].y = e[rr[i]].y;
							else if(s1 < s2)
								e[i].y = e[ll[i]].y;
							else
							{
								if(e[ll[i]].y > e[rr[i]].y)
									e[i].y = e[ll[i]].y;
								else
									e[i].y = e[rr[i]].y;
							}
						}
						else if(ll[i] != -1)
						{
							e[i].y = e[ll[i]].y;
						}
						else
						{
							e[i].y = e[rr[i]].y;
						}
					}
				}
				int x, sum = 0;
				scanf("%d", &x);
				for(int i  = 1; i <= n; i++)
					if(e[i].y <= x)
						sum++;
				printf("%d\n", sum);
			}
			else
			{
				int x, y;
				scanf("%d %d", &x, &y);
				e[x+1].y = y;
			}
		}
	}
	return 0;
}