UVa 11790 - Murcia's Skyline

题目：给你一排建筑的长度和高度，求最长的上横高度和下降高度。

分析：dp，最大上升子序列。

说明：有长度，不能直接用单调队列优化。

#include <iostream>
#include <cstdlib>
#include <cstdio>

using namespace std;

int h[2000],w[2000],u[2000],l[2000];

int main()
{
	int T,n;
	while (~scanf("%d",&T))
	for (int t = 1 ; t <= T ; ++ t) {
		scanf("%d",&n);
		for (int i = 0 ; i < n ; ++ i)
			scanf("%d",&h[i]);
		for (int i = 0 ; i < n ; ++ i)
			scanf("%d",&w[i]);

		int in = 0,de = 0;
		for (int i = 0 ; i < n ; ++ i) {
			u[i] = l[i] = w[i];
			for (int j = 0 ; j < i ; ++ j) {
				if (h[j] < h[i] && u[i] < u[j]+w[i])
					u[i] = u[j]+w[i];
				if (h[j] > h[i] && l[i] < l[j]+w[i])
					l[i] = l[j]+w[i];
			}
			if (in < u[i]) in = u[i];
			if (de < l[i]) de = l[i];
		}
		if (in >= de)
			printf("Case %d. Increasing (%d). Decreasing (%d).\n",t,in,de);
		else printf("Case %d. Decreasing (%d). Increasing (%d).\n",t,de,in);
	}
	return 0;
}

UVa 11790 - Murcia's Skyline