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답안 #213581

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
213581 2020-03-26T08:14:37 Z tmwilliamlin168 청소 (JOI20_sweeping) C++14
22 / 100
 9548 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 206 ms 363104 KB Output is correct
2 Correct 200 ms 363908 KB Output is correct
3 Correct 184 ms 361720 KB Output is correct
4 Correct 193 ms 363128 KB Output is correct
5 Correct 203 ms 365304 KB Output is correct
6 Correct 199 ms 364024 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7134 ms 1102996 KB Output is correct
2 Correct 7098 ms 1113432 KB Output is correct
3 Correct 7072 ms 1124656 KB Output is correct
4 Correct 4575 ms 1014152 KB Output is correct
5 Correct 5608 ms 1230800 KB Output is correct
6 Correct 7177 ms 1123848 KB Output is correct
7 Correct 7618 ms 1123976 KB Output is correct

Subtask #3
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8016 ms 1230288 KB Output is correct
2 Correct 7663 ms 1220284 KB Output is correct
3 Correct 5584 ms 1133992 KB Output is correct
4 Correct 7321 ms 1379512 KB Output is correct
5 Correct 8167 ms 1235224 KB Output is correct
6 Correct 8032 ms 1219180 KB Output is correct

Subtask #4
0 / 53.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8016 ms 1230288 KB Output is correct
2 Correct 7663 ms 1220284 KB Output is correct
3 Correct 5584 ms 1133992 KB Output is correct
4 Correct 7321 ms 1379512 KB Output is correct
5 Correct 8167 ms 1235224 KB Output is correct
6 Correct 8032 ms 1219180 KB Output is correct
7 Correct 7499 ms 1219624 KB Output is correct
8 Correct 7766 ms 1219944 KB Output is correct
9 Correct 7662 ms 1220304 KB Output is correct
10 Correct 5589 ms 1133856 KB Output is correct
11 Correct 7138 ms 1379404 KB Output is correct
12 Correct 8114 ms 1219120 KB Output is correct
13 Correct 8058 ms 1219284 KB Output is correct
14 Runtime error 9548 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 206 ms 363104 KB Output is correct
2 Correct 200 ms 363908 KB Output is correct
3 Correct 184 ms 361720 KB Output is correct
4 Correct 193 ms 363128 KB Output is correct
5 Correct 203 ms 365304 KB Output is correct
6 Correct 199 ms 364024 KB Output is correct
7 Correct 7134 ms 1102996 KB Output is correct
8 Correct 7098 ms 1113432 KB Output is correct
9 Correct 7072 ms 1124656 KB Output is correct
10 Correct 4575 ms 1014152 KB Output is correct
11 Correct 5608 ms 1230800 KB Output is correct
12 Correct 7177 ms 1123848 KB Output is correct
13 Correct 7618 ms 1123976 KB Output is correct
14 Correct 8016 ms 1230288 KB Output is correct
15 Correct 7663 ms 1220284 KB Output is correct
16 Correct 5584 ms 1133992 KB Output is correct
17 Correct 7321 ms 1379512 KB Output is correct
18 Correct 8167 ms 1235224 KB Output is correct
19 Correct 8032 ms 1219180 KB Output is correct
20 Correct 7499 ms 1219624 KB Output is correct
21 Correct 7766 ms 1219944 KB Output is correct
22 Correct 7662 ms 1220304 KB Output is correct
23 Correct 5589 ms 1133856 KB Output is correct
24 Correct 7138 ms 1379404 KB Output is correct
25 Correct 8114 ms 1219120 KB Output is correct
26 Correct 8058 ms 1219284 KB Output is correct
27 Runtime error 9548 ms 2097152 KB Execution killed with signal 9 (could be triggered by violating memory limits)
28 Halted 0 ms 0 KB -