POJ2777 Count Color 线段树区间更新

标签：blog   color   使用   2014   os   代码   

PS:初始状态下画板颜色为1

一开始没有想那么好，用int整型位移来代替颜色，还是使用了最传统的bool color[来记录，可是不知道错在了哪里，

#include<iostream>
#include<cstdio>
#include<list>
#include<algorithm>
#include<cstring>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<vector>
#include<cmath>
#include<memory.h>
#include<set>
#include<cctype>

#define ll long long

#define LL __int64

#define eps 1e-8

#define inf 0xfffffff

//const LL INF = 1LL<<61;

using namespace std;

//vector<pair<int,int> > G;
//typedef pair<int,int > P;
//vector<pair<int,int> > ::iterator iter;
//
//map<ll,int >mp;
//map<ll,int >::iterator p;


const int N = 100000 + 5;

typedef struct Node {
	int color;
	int l,r;
};

Node tree[N * 4];
bool vis[50];

void init() {
	memset(vis,false,sizeof(vis));
}

void build(int l,int r,int id) {
	tree[id].color = 1;
	tree[id].l = l;
	tree[id].r = r;
	if(tree[id].l == tree[id].r)return;
	int mid = (l + r)/2;
	build(l,mid,id<<1);
	build(mid + 1,r,id<<1|1);
}

void update(int l,int r,int id,int color) {
	if(tree[id].l >= l && tree[id].r <= r) {
		tree[id].color = color;return;
	}
	int mid = (tree[id].l + tree[id].r)/2;
	tree[id].color = -1;
	if(r <= mid) update(l,r,id<<1,color);
	else  {
		if(l > mid)update(l,r,id<<1|1,color);
		else {
			update(l,mid,id<<1,color);
			update(mid+1,r,id<<1|1,color);
		}
	}
}

void update2(int l,int r,int id) {
	if(tree[id].color > 0) {
		vis[tree[id].color] = true;return;
	}
	if(tree[id].l == tree[id].r)return;
	int mid = (tree[id].l + tree[id].r)/2;
	if(r <= mid) update2(l,r,id<<1);
	else {
		if(l > mid)update2(l,r,id<<1|1);
		else {
			update2(l,mid,id<<1);
			update2(mid+1,r,id<<1|1);
		}
	}
}

int find(int x) {
	int ans = 0;
	for(int i=1;i<=x;i++)
		if(vis[i])
			ans++;
	return ans;
}

int main() {
	int n,m,q;
	while(scanf("%d %d %d",&n,&m,&q) == 3 ){
		memset(tree,0,sizeof(tree));
		init();
		build(1,n,1);
		while(q--) {
			char s[2];
			scanf("%s",s);
			if(s[0] == 'C') {
				int x,y,c;
				scanf("%d %d %d",&x,&y,&c);
				if(x > y)swap(x,y);
				update(x,y,1,c);
			}
			else {
				int x,y;
				scanf("%d %d",&x,&y);
				init();
				if(x > y)swap(x,y);
				update2(x,y,1);
				printf("%d\n",find(m));
			}

		}
	}
	return 0;
}

#include<iostream>
#include<cstdio>
#include<list>
#include<algorithm>
#include<cstring>
#include<string>
#include<queue>
#include<stack>
#include<map>
#include<vector>
#include<cmath>
#include<memory.h>
#include<set>
#include<cctype>

#define ll long long

#define LL __int64

#define eps 1e-8

#define inf 0xfffffff

//const LL INF = 1LL<<61;

using namespace std;

//vector<pair<int,int> > G;
//typedef pair<int,int > P;
//vector<pair<int,int> > ::iterator iter;
//
//map<ll,int >mp;
//map<ll,int >::iterator p;

const int N = 100000 + 5;

typedef struct Node {
	int l,r;
	int color;
	int flag;
};

Node tree[N * 4];

void init() {
	memset(tree,0,sizeof(tree));
}

void cal(int id) {
	tree[id].color = tree[id<<1].color | tree[id<<1|1].color;
}

void build(int l,int r,int id) {
	tree[id].l = l;
	tree[id].r = r;
	tree[id].color = 1;
	tree[id].flag = 1;
	if(tree[id].l == tree[id].r) return;
	int mid = (l + r)/2;
	build(l,mid,id<<1);
	build(mid+1,r,id<<1|1);
}

void cover(int id) {
	tree[id<<1].color = tree[id].color;
	tree[id<<1].flag = 1;
	tree[id<<1|1].color = tree[id].color;
	tree[id<<1|1].flag = 1;
	tree[id].flag = 0;
}

void updata(int l,int r,int id,int col) {
	if(l <= tree[id].l && r >= tree[id].r) {
		tree[id].color = col;
		tree[id].flag = 1;
		return;
	}
	if(tree[id].color == col)return;
	if(tree[id].flag)cover(id);
	int mid = (tree[id].l + tree[id].r)/2;
	if(r <= mid) updata(l,r,id<<1,col);
	else if(l > mid)updata(l,r,id<<1|1,col);
	else {
		updata(l,mid,id<<1,col);
		updata(mid+1,r,id<<1|1,col);
	}
	cal(id);
}

int ans;

void query(int l,int r,int id) {
	if(l <= tree[id].l && r >= tree[id].r) {
		ans |= tree[id].color;return;
	}
	if(tree[id].flag) {
		ans |= tree[id].color;return;
	}
	int mid = (tree[id].l + tree[id].r)/2;
	if(r <= mid) query(l,r,id<<1);
	else if(l > mid) query(l,r,id<<1|1);
	else {
		query(l,mid,id<<1);
		query(mid+1,r,id<<1|1);
	}
}

int main() {
	int n,m,q;
	while(scanf("%d %d %d",&n,&m,&q) == 3) {
		init();
		build(1,n,1);
		char s[2];
		while(q--) {
			scanf("%s",s);
			if(s[0] == 'C') {
				int x,y,c;
				scanf("%d %d %d",&x,&y,&c);
				if(x > y)swap(x,y);
				updata(x,y,1,1<<(c-1));//把颜色改成用正向委员算表示
			}
			else {
				int x,y;
				scanf("%d %d",&x,&y);
				if(x > y)swap(x,y);
				ans = 0;
				query(x,y,1);
				int cnt = 0;
				while(ans) {
					if(ans%2)cnt++;
					ans /= 2;
				}
				printf("%d\n",cnt);
			}
		}
	}
	return 0;
}

POJ2777 Count Color 线段树区间更新,布布扣,bubuko.com

POJ2777 Count Color 线段树区间更新

标签：blog   color   使用   2014   os   代码   

原文地址：http://blog.csdn.net/yitiaodacaidog/article/details/36035365