oj.uz

Submission #886254

# Submission time Handle Problem Language Result Execution time Memory
886254 2023-12-11T16:00:19 Z vjudge1 Curtains (NOI23_curtains) C++11
20 / 100
 1033 ms 18196 KB 
#include <bits/stdc++.h>
#define pb push_back
#define all(aa) aa.begin(), aa.end()
using namespace std;

struct BIT{
	int n;
	vector<int> cnt, fen;
	BIT(vector<int> a) : cnt(a){
		n = a.size();
		fen.resize(n);
		for(int i = 0; i < n; i++){
			if(cnt[i]) upd(i);
		}
	}

	void upd(int pos){
		for(int j = pos; j < n; j = j|(j+1)){
			fen[j] += 1;
		}
	}

	int find(int pos){
		int ret = 0;
		for(int j = pos; j >= 0; j = (j & (j + 1)) - 1)
			ret += fen[j];
		return ret;
	}

	int find(int l, int r){
		return find(r) - find(l - 1);
	}
};

int main(){
	int n, m, q;
	cin >> n >> m >> q;
	vector<int> cnt(n);
	vector<int> ok(n);
	vector<int> mn(n, n+1);
	for(int i = 0; i < m; i++){
		int a, b;
		cin >> a >> b;
		--a, --b;
		mn[b] = min(mn[b], a);
		if(a == 0) cnt[b] = 1;
	}

 	BIT fen(cnt);

	for(int i = 0; i < n; i++){
		if(fen.find(mn[i]-1, i) > 0){
			ok[i] = 1;
			fen.upd(i);
		}
	}
	for(int i = 0; i < q; i++){
		int a, b;
		cin >> a >> b;
		--a, --b;
		cout << (ok[b] ? "YES" : "NO") << endl;
	}
}

Subtask #1
0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 6 ms 348 KB Output is correct
6 Correct 4 ms 344 KB Output is correct
7 Correct 4 ms 348 KB Output is correct
8 Correct 729 ms 4528 KB Output is correct
9 Correct 735 ms 4724 KB Output is correct
10 Correct 880 ms 6728 KB Output is correct
11 Correct 720 ms 4448 KB Output is correct
12 Correct 188 ms 4032 KB Output is correct
13 Correct 203 ms 4176 KB Output is correct
14 Correct 196 ms 4136 KB Output is correct
15 Correct 187 ms 4104 KB Output is correct
16 Correct 186 ms 4044 KB Output is correct
17 Correct 188 ms 4100 KB Output is correct
18 Correct 993 ms 18040 KB Output is correct
19 Correct 985 ms 18196 KB Output is correct
20 Correct 1033 ms 17780 KB Output is correct
21 Correct 1008 ms 17712 KB Output is correct
22 Correct 996 ms 17840 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Incorrect 1 ms 348 KB Output isn't correct
3 Halted 0 ms 0 KB -