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답안 #213582

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
213582 2020-03-26T08:18:13 Z tmwilliamlin168 청소 (JOI20_sweeping) C++14
22 / 100
 9104 ms 2097152 KB 
#include <bits/stdc++.h>
using namespace std;

#define ar array

const int mxM=5e5, mxQ=1e6;
int n, m, q, no;
vector<ar<int, 3>> v;

void pr(ar<int, 2> &a, int l, int t) {
	if(a[t^1]<=l&&a[t]<n-l)
		a[t]=n-l;
}

struct rmq {
	int n;
	vector<int> st;
	vector<int> rank;
	int mn(int a, int b) {
		if(b==-1)
			return a;
		return rank[a]<rank[b]?a:b;
	}
	void bld(vector<int> a, vector<int> rk) {
		rank=rk;
		n=a.size();
		st=vector<int>(2*n);
		for(int i=0; i<n; ++i)
			st[i+n]=a[i];
		for(int i=n-1; i; --i)
			st[i]=mn(st[2*i], st[2*i+1]);
	}
	int qry(int l, int r) {
		int b=-1;
		for(l+=n, r+=n+1; l<r; ++l/=2, r/=2) {
			if(l&1)
				b=mn(st[l], b);
			if(r&1)
				b=mn(st[r-1], b);
		}
		return b;
	}
};

struct node {
	vector<ar<int, 3>> q, qs;
	rmq rq;
	vector<vector<int>> pr;
	vector<int> p, rank;
	void dfs(int u) {
		for(int v : pr[u])
			dfs(v);
		p.push_back(u);
	}
	void bld() {
		int m=q.size();
		pr=vector<vector<int>>(m);
		set<ar<int, 3>> s;
		for(ar<int, 3> a : q) {
			auto it=s.lower_bound(a), it2=it;
			bool hp=0;
			if(it!=s.end()) {
				//type 1
				if(a[1]==1&&(*it)[1]==1) {
					pr[(*it)[2]].push_back(a[2]);
					hp=1;
				}
			}
			it=it2;
			if(it!=s.begin()) {
				--it;
				//type 0
				if(a[1]==0&&(*it)[1]==0) {
					pr[(*it)[2]].push_back(a[2]);
					hp=1;
				}
			}
			if(!hp)
				rank.push_back(a[2]);
			s.insert(a);
		}
		for(ar<int, 3> a : s)
			qs.push_back(a);
		for(int u : rank)
			dfs(u);
		rank=vector<int>(m);
		for(int i=0; i<m; ++i)
			rank[p[i]]=i;
		vector<int> sta;
		for(int i=0; i<m; ++i)
			sta.push_back(qs[i][2]);
		rq.bld(sta, rank);
	}
	void app(ar<int, 2> &a) {
		int l=lower_bound(qs.begin(), qs.end(), ar<int, 3>{a[0]})-qs.begin(), r=lower_bound(qs.begin(), qs.end(), ar<int, 3>{n-a[1]+1})-qs.begin()-1;
		if(l>r)
			return;
		int qi=rq.qry(l, r), p=lower_bound(qs.begin(), qs.end(), q[qi])-qs.begin();
		::pr(a, q[qi][1]?q[qi][0]:n-q[qi][0], q[qi][1]);
		if(q[qi][1]) {
			//vertical, then horizontal
			if(l>p-1)
				return;
			r=p-1;
		} else {
			//horizontal, then vertical
			if(p+1>r)
				return;
			l=p+1;
		}
		qi=rq.qry(l, r);
		::pr(a, q[qi][1]?q[qi][0]:n-q[qi][0], q[qi][1]);
	}
} st[1<<21];

void qry(ar<int, 2> &a, int l1, int r1, int i=1, int l2=0, int r2=(1<<20)-1) {
	if(l1<=l2&&r2<=r1) {
		st[i].app(a);
		return;
	}
	int m2=(l2+r2)/2;
	if(l1<=m2)
		qry(a, l1, r1, 2*i, l2, m2);
	if(m2<r1)
		qry(a, l1, r1, 2*i+1, m2+1, r2);
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> n >> m >> q;
	v=vector<ar<int, 3>>(m);
	for(int i=0; i<m; ++i)
		cin >> v[i][0] >> v[i][1];
	while(q--) {
		int qt;
		cin >> qt;
		if(qt==1) {
			int p;
			cin >> p, --p;
			ar<int, 2> a{v[p][0], v[p][1]};
			if(no)
				qry(a, v[p][2], no-1);
			cout << a[0] << " " << a[1] << "\n";
		} else if(qt==2||qt==3) {
			int l;
			cin >> l;
			int u=no+(1<<20);
			while(u) {
				st[u].q.push_back({qt&1?l:n-l, qt-2, st[u].q.size()});
				u/=2;
			}
			u=no+(1<<20);
			while(1) {
				st[u].bld();
				if((u+1)&1)
					break;
				u/=2;
			}
			++no;
		} else if(qt==4) {
			int a, b;
			cin >> a >> b;
			v.push_back({a, b, no});
		}
	}
}

Compilation message

sweeping.cpp: In function 'int main()':
sweeping.cpp:151:54: warning: narrowing conversion of 'st[u].node::q.std::vector<std::array<int, 3> >::size()' from 'std::vector<std::array<int, 3> >::size_type {aka long unsigned int}' to 'int' inside { } [-Wnarrowing]
     st[u].q.push_back({qt&1?l:n-l, qt-2, st[u].q.size()});
                                          ~~~~~~~~~~~~^~

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 212 ms 363128 KB Output is correct
2 Correct 217 ms 363896 KB Output is correct
3 Correct 198 ms 361720 KB Output is correct
4 Correct 210 ms 363128 KB Output is correct
5 Correct 222 ms 365304 KB Output is correct
6 Correct 219 ms 364024 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7000 ms 1102980 KB Output is correct
2 Correct 7138 ms 1113356 KB Output is correct
3 Correct 7125 ms 1124616 KB Output is correct
4 Correct 4512 ms 1014024 KB Output is correct
5 Correct 5717 ms 1231240 KB Output is correct
6 Correct 7185 ms 1123720 KB Output is correct
7 Correct 7893 ms 1123852 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8131 ms 1230240 KB Output is correct
2 Correct 7646 ms 1220288 KB Output is correct
3 Correct 5570 ms 1133852 KB Output is correct
4 Correct 7192 ms 1379492 KB Output is correct
5 Correct 8366 ms 1235224 KB Output is correct
6 Correct 8131 ms 1219176 KB Output is correct

Subtask #4
0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8131 ms 1230240 KB Output is correct
2 Correct 7646 ms 1220288 KB Output is correct
3 Correct 5570 ms 1133852 KB Output is correct
4 Correct 7192 ms 1379492 KB Output is correct
5 Correct 8366 ms 1235224 KB Output is correct
6 Correct 8131 ms 1219176 KB Output is correct
7 Correct 7518 ms 1219624 KB Output is correct
8 Correct 7642 ms 1219948 KB Output is correct
9 Correct 7559 ms 1220308 KB Output is correct
10 Correct 5623 ms 1133988 KB Output is correct
11 Correct 7209 ms 1379492 KB Output is correct
12 Correct 8090 ms 1219116 KB Output is correct
13 Correct 8069 ms 1219276 KB Output is correct
14 Runtime error 9104 ms 2097152 KB Execution killed with signal 9 (could be triggered by violating memory limits)
15 Halted 0 ms 0 KB -

Subtask #5
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 212 ms 363128 KB Output is correct
2 Correct 217 ms 363896 KB Output is correct
3 Correct 198 ms 361720 KB Output is correct
4 Correct 210 ms 363128 KB Output is correct
5 Correct 222 ms 365304 KB Output is correct
6 Correct 219 ms 364024 KB Output is correct
7 Correct 7000 ms 1102980 KB Output is correct
8 Correct 7138 ms 1113356 KB Output is correct
9 Correct 7125 ms 1124616 KB Output is correct
10 Correct 4512 ms 1014024 KB Output is correct
11 Correct 5717 ms 1231240 KB Output is correct
12 Correct 7185 ms 1123720 KB Output is correct
13 Correct 7893 ms 1123852 KB Output is correct
14 Correct 8131 ms 1230240 KB Output is correct
15 Correct 7646 ms 1220288 KB Output is correct
16 Correct 5570 ms 1133852 KB Output is correct
17 Correct 7192 ms 1379492 KB Output is correct
18 Correct 8366 ms 1235224 KB Output is correct
19 Correct 8131 ms 1219176 KB Output is correct
20 Correct 7518 ms 1219624 KB Output is correct
21 Correct 7642 ms 1219948 KB Output is correct
22 Correct 7559 ms 1220308 KB Output is correct
23 Correct 5623 ms 1133988 KB Output is correct
24 Correct 7209 ms 1379492 KB Output is correct
25 Correct 8090 ms 1219116 KB Output is correct
26 Correct 8069 ms 1219276 KB Output is correct
27 Runtime error 9104 ms 2097152 KB Execution killed with signal 9 (could be triggered by violating memory limits)
28 Halted 0 ms 0 KB -