oj.uz

Submission #869465

# Submission time Handle Problem Language Result Execution time Memory
869465 2023-11-04T11:59:23 Z Hakiers Monochrome Points (JOI20_monochrome) C++17
35 / 100
 300 ms 4304 KB 
#include <bits/stdc++.h>
using namespace std;
const int BASE = 1 << 12;
int TREE[BASE << 1];
int n;
string monochrome;
queue<int> BPOS;
queue<int> WPOS;

void add(int v, int val){
	v+=BASE;
	TREE[v] += val;
	v/=2;
	while(v > 0){
		int l = 2*v, r = 2*v+1;
		TREE[v] = TREE[l] + TREE[r];
		v/=2;
	}
}
int query(int a, int b){
	a += BASE - 1;
	b += BASE + 1;
	
	int res = 0;
	while(a/2 != b/2){
		if(!(a&1)) res += TREE[a+1];
		if(b&1) res += TREE[b-1];
		a/=2; b/=2;
	}
	return res;
}

void treeclear(){
	for(int i = 0; i < (BASE << 1); i++)
		TREE[i] = 0;

}

int solve(int wsp){
	treeclear();

	for(int i = n+wsp; i >= 1 + wsp; i--){
		if(monochrome[i] == 'B')
			BPOS.push(i);
		else if(monochrome[i] == 'W')
			WPOS.push(i);
	}
	
	int res = 0;
	
	for(int i = 2*n+wsp; i >= n+1 + wsp; i--){
		if(monochrome[i] == 'B'){
			int v = WPOS.front();
			WPOS.pop();
			//cout << "query: " << query(v, BASE-1) << "\n";
			res += query(v, BASE-1);
			add(v, 1);
		}
		else if(monochrome[i] == 'W'){
			int v = BPOS.front();
			BPOS.pop();
			//cout << "query: " << query(v, BASE-1) << "\n";
			res += query(v, BASE-1);
			add(v, 1);
		}
	}

	return res;
}

int best(){
	int res = 0;
	
	for(int i = 0; i <= n; i++)
		res = max(res, solve(i));
	return res;

}

int main(){
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n;
	cin >> monochrome;
	monochrome = monochrome + monochrome;
	monochrome = "#" + monochrome;
	
	/*
	for(int i = n; i >= 1; i--){
		if(monochrome[i] == 'B')
			BPOS.push(i);
		else if(monochrome[i] == 'W')
			WPOS.push(i);
	}
	*/
	cout << best() << "\n";

}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 6 ms 604 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 5 ms 496 KB Output is correct
17 Correct 5 ms 348 KB Output is correct
18 Correct 5 ms 348 KB Output is correct
19 Correct 5 ms 348 KB Output is correct
20 Correct 4 ms 348 KB Output is correct
21 Correct 4 ms 348 KB Output is correct
22 Correct 4 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 4 ms 348 KB Output is correct
25 Correct 3 ms 348 KB Output is correct
26 Correct 4 ms 600 KB Output is correct
27 Correct 4 ms 348 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 4 ms 488 KB Output is correct
30 Correct 4 ms 348 KB Output is correct
31 Correct 5 ms 496 KB Output is correct
32 Correct 5 ms 348 KB Output is correct
33 Correct 6 ms 348 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 6 ms 604 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 5 ms 496 KB Output is correct
17 Correct 5 ms 348 KB Output is correct
18 Correct 5 ms 348 KB Output is correct
19 Correct 5 ms 348 KB Output is correct
20 Correct 4 ms 348 KB Output is correct
21 Correct 4 ms 348 KB Output is correct
22 Correct 4 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 4 ms 348 KB Output is correct
25 Correct 3 ms 348 KB Output is correct
26 Correct 4 ms 600 KB Output is correct
27 Correct 4 ms 348 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 4 ms 488 KB Output is correct
30 Correct 4 ms 348 KB Output is correct
31 Correct 5 ms 496 KB Output is correct
32 Correct 5 ms 348 KB Output is correct
33 Correct 6 ms 348 KB Output is correct
34 Correct 292 ms 480 KB Output is correct
35 Correct 287 ms 496 KB Output is correct
36 Correct 277 ms 596 KB Output is correct
37 Correct 256 ms 544 KB Output is correct
38 Correct 241 ms 348 KB Output is correct
39 Correct 271 ms 488 KB Output is correct
40 Correct 227 ms 484 KB Output is correct
41 Correct 206 ms 488 KB Output is correct
42 Correct 273 ms 348 KB Output is correct
43 Correct 279 ms 344 KB Output is correct
44 Correct 252 ms 484 KB Output is correct
45 Correct 246 ms 344 KB Output is correct
46 Correct 269 ms 348 KB Output is correct
47 Correct 265 ms 348 KB Output is correct
48 Correct 300 ms 344 KB Output is correct
49 Correct 244 ms 492 KB Output is correct
50 Correct 287 ms 348 KB Output is correct
51 Correct 287 ms 348 KB Output is correct
52 Correct 296 ms 484 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 344 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 6 ms 604 KB Output is correct
15 Correct 5 ms 348 KB Output is correct
16 Correct 5 ms 496 KB Output is correct
17 Correct 5 ms 348 KB Output is correct
18 Correct 5 ms 348 KB Output is correct
19 Correct 5 ms 348 KB Output is correct
20 Correct 4 ms 348 KB Output is correct
21 Correct 4 ms 348 KB Output is correct
22 Correct 4 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 4 ms 348 KB Output is correct
25 Correct 3 ms 348 KB Output is correct
26 Correct 4 ms 600 KB Output is correct
27 Correct 4 ms 348 KB Output is correct
28 Correct 5 ms 348 KB Output is correct
29 Correct 4 ms 488 KB Output is correct
30 Correct 4 ms 348 KB Output is correct
31 Correct 5 ms 496 KB Output is correct
32 Correct 5 ms 348 KB Output is correct
33 Correct 6 ms 348 KB Output is correct
34 Correct 292 ms 480 KB Output is correct
35 Correct 287 ms 496 KB Output is correct
36 Correct 277 ms 596 KB Output is correct
37 Correct 256 ms 544 KB Output is correct
38 Correct 241 ms 348 KB Output is correct
39 Correct 271 ms 488 KB Output is correct
40 Correct 227 ms 484 KB Output is correct
41 Correct 206 ms 488 KB Output is correct
42 Correct 273 ms 348 KB Output is correct
43 Correct 279 ms 344 KB Output is correct
44 Correct 252 ms 484 KB Output is correct
45 Correct 246 ms 344 KB Output is correct
46 Correct 269 ms 348 KB Output is correct
47 Correct 265 ms 348 KB Output is correct
48 Correct 300 ms 344 KB Output is correct
49 Correct 244 ms 492 KB Output is correct
50 Correct 287 ms 348 KB Output is correct
51 Correct 287 ms 348 KB Output is correct
52 Correct 296 ms 484 KB Output is correct
53 Runtime error 5 ms 4304 KB Execution killed with signal 11
54 Halted 0 ms 0 KB -