【BZOJ 2648】SJY摆棋子 & 【BZOJ 2716】【Violet 3】天使玩偶

KDTree模板,双倍经验啦啦啦~

#include<cstdio>
#include<cstring>
#include<algorithm>
#define read(x) x=getint()
using namespace std;
const int N = 500003;
const int inf = 0x7fffffff;
int getint() {
	int k = 0, fh = 1; char c = getchar();
	for(; c < '0' || c > '9'; c = getchar())
		if (c == '-') fh = -1;
	for(; c >= '0' && c <= '9'; c = getchar())
		k = k * 10 + c - '0';
	return k * fh;
}
bool D;
int n, t, root, ans;
struct KDT {
	int d[2], ch[2], minn[2], maxn[2];
	bool operator < (const KDT &a) const {return d[D] < a.d[D];}
	void init() {for(int i = 0; i < 2; ++i) minn[i] = maxn[i] = d[i];}
} T[N << 1], QQ;
void pushup(int rt) {
	for(int i = 0; i < 2; ++i)
		if (T[rt].ch[i]) {
			int x = T[rt].ch[i];
			for(int j = 0; j < 2; ++j)
				T[rt].minn[j] = min(T[rt].minn[j], T[x].minn[j]),
				T[rt].maxn[j] = max(T[rt].maxn[j], T[x].maxn[j]);
		}
}
int Build(int l = 1, int r = n, bool d = 0) {
	D = d; int mid = (l + r) >> 1; nth_element(T + l, T + mid, T + r + 1);
	T[mid].init();
	if (l != mid) T[mid].ch[0] = Build(l, mid - 1, !d);
	if (r != mid) T[mid].ch[1] = Build(mid + 1, r, !d);
	pushup(mid);
	return mid;
}
int ask(int rt, KDT p) {
	int ret = 0;
	for(int i = 0; i < 2; ++i)
		ret += max(0, T[rt].minn[i] - p.d[i]), ret += 	max(0, p.d[i] - T[rt].maxn[i]);
	return ret;
}
void insert(int rt = root, bool d = 0) {
	bool flag = T[n].d[d] > T[rt].d[d];
	if (T[rt].ch[flag]) insert(T[rt].ch[flag], !d);
	else T[rt].ch[flag] = n;
	pushup(rt);
}
int dis(KDT a, KDT b) {
	return abs(a.d[0] - b.d[0]) + abs(a.d[1] - b.d[1]);
}
void Query(int rt = root, bool d = 0) {
	int Dis = dis(T[rt], QQ), dl = inf, dr = inf;
	ans = min(ans, Dis);
	if (T[rt].ch[0]) dl = ask(T[rt].ch[0], QQ);
	if (T[rt].ch[1]) dr = ask(T[rt].ch[1], QQ);
	if (dl < dr) {
		if (dl < ans) Query(T[rt].ch[0], !d);
		if (dr < ans) Query(T[rt].ch[1], !d);
	} else {
		if (dr < ans) Query(T[rt].ch[1], !d);
		if (dl < ans) Query(T[rt].ch[0], !d);
	}
}
int main() {
	read(n); read(t);
	for(int i = 1; i <= n; ++i)
		read(T[i].d[0]), read(T[i].d[1]);
	int num;
	for(root = Build(); t; --t) {
		read(num); ans = inf;
		if (num == 1) {
			read(T[++n].d[0]); read(T[n].d[1]);
			T[n].init();
			insert();
		} else {
			read(QQ.d[0]); read(QQ.d[1]);
			Query();
			printf("%d\n", ans);
		}
	}
	return 0;
}

现在学新东西感觉就是作死啊~

NOI 2017 Bless All
posted @ 2016-04-27 17:21  abclzr  阅读(188)  评论(0编辑  收藏  举报