답안 #543281

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
543281	2022-03-30T03:31:13 Z	8e7	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	2000 ms	7392 KB

monochrome

//Challenge: Accepted
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
using namespace std;
#ifdef zisk
void debug(){cout << endl;}
template<class T, class ... U> void debug(T a, U ... b){cout << a << " ", debug(b...);}
template<class T> void pary(T l, T r) {
	while (l != r) cout << *l << " ", l++;
	cout << endl;
}
#else
#define debug(...) 0
#define pary(...) 0
#endif
#define ll long long
#define maxn 400005
#define pii pair<int, int>
#define ff first
#define ss second
#define io ios_base::sync_with_stdio(0);cin.tie(0);
int a[maxn], p[maxn];
int bp[maxn], wp[maxn];
struct BIT{
	int bit[maxn];
	void init(int n) {
		for (int i = 0;i <= n + 1;i++) bit[i] = 0;
	}
	void modify(int ind, int val) {
		ind++;
		for (;ind < maxn;ind += ind & (-ind)) bit[ind] += val;	
	}
	int query(int ind) {
		ind++;
		int ret = 0;
		for (;ind > 0;ind -= ind & (-ind)) ret += bit[ind];
		return ret;
	}
} bit;
int main() {
	io
	int n;
	cin >> n;
	n *= 2;
	string s;
	cin >> s;
	int mi = 0, mpos = 0, cur = 0;
	for (int i = 0;i < n;i++) {
		if (cur < mi) {
			mi = cur;
			mpos = i;
		} 
		cur += (s[i] == 'B' ? 1 : -1);
	}
	int bi = 0, wi = 0;
	for (int i = 0;i < n;i++) {
		a[i] = (s[(mpos + i) % n] == 'B' ? 1 : -1);
		if (a[i] == 1) bp[bi++] = i;
		else wp[wi++] = i;
	}	
	auto getval = [&](int x) {
		for (int i = 0;i < n/2;i++) {
			p[bp[i]] = (i < x ? 1 : -1);
			p[wp[i]] = (i < n/2 - x ? 1 : -1);
		}
		int cur = 0;
		bit.init(n);
		ll ret = 0;
		int bi = 0, wi = 0;	
		//debug(x);
		//pary(p, p + n);
		for (int i = 0;i < n;i++) {
			cur += p[i];
			if (cur < 0) return 0LL;	
			if (p[i] == 1) {
				bit.modify(i, 1);
			} else {
				int cor = (a[i] > 0 ? wp[wi++] : bp[bi++]);
				//debug(i, cor);
				ret += bit.query(i) - bit.query(cor);	
				bit.modify(cor, -1);
			}
		}
		//debug(ret);
		return ret;
	};
	ll ans = 0;
	for (int i = 0;i <= n / 2;i++) {
		ans = max(ans, getval(i));	
	}
	cout << ans << endl;
}

Subtask #1

4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct

Subtask #2

21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	8 ms	332 KB	Output is correct
15	Correct	7 ms	400 KB	Output is correct
16	Correct	7 ms	396 KB	Output is correct
17	Correct	9 ms	340 KB	Output is correct
18	Correct	6 ms	340 KB	Output is correct
19	Correct	6 ms	340 KB	Output is correct
20	Correct	6 ms	340 KB	Output is correct
21	Correct	5 ms	340 KB	Output is correct
22	Correct	6 ms	400 KB	Output is correct
23	Correct	4 ms	340 KB	Output is correct
24	Correct	4 ms	340 KB	Output is correct
25	Correct	5 ms	340 KB	Output is correct
26	Correct	4 ms	340 KB	Output is correct
27	Correct	5 ms	340 KB	Output is correct
28	Correct	5 ms	328 KB	Output is correct
29	Correct	4 ms	340 KB	Output is correct
30	Correct	4 ms	340 KB	Output is correct
31	Correct	6 ms	340 KB	Output is correct
32	Correct	5 ms	340 KB	Output is correct
33	Correct	8 ms	324 KB	Output is correct

Subtask #3

10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	8 ms	332 KB	Output is correct
15	Correct	7 ms	400 KB	Output is correct
16	Correct	7 ms	396 KB	Output is correct
17	Correct	9 ms	340 KB	Output is correct
18	Correct	6 ms	340 KB	Output is correct
19	Correct	6 ms	340 KB	Output is correct
20	Correct	6 ms	340 KB	Output is correct
21	Correct	5 ms	340 KB	Output is correct
22	Correct	6 ms	400 KB	Output is correct
23	Correct	4 ms	340 KB	Output is correct
24	Correct	4 ms	340 KB	Output is correct
25	Correct	5 ms	340 KB	Output is correct
26	Correct	4 ms	340 KB	Output is correct
27	Correct	5 ms	340 KB	Output is correct
28	Correct	5 ms	328 KB	Output is correct
29	Correct	4 ms	340 KB	Output is correct
30	Correct	4 ms	340 KB	Output is correct
31	Correct	6 ms	340 KB	Output is correct
32	Correct	5 ms	340 KB	Output is correct
33	Correct	8 ms	324 KB	Output is correct
34	Correct	304 ms	432 KB	Output is correct
35	Correct	310 ms	444 KB	Output is correct
36	Correct	288 ms	340 KB	Output is correct
37	Correct	277 ms	424 KB	Output is correct
38	Correct	197 ms	428 KB	Output is correct
39	Correct	234 ms	440 KB	Output is correct
40	Correct	237 ms	428 KB	Output is correct
41	Correct	200 ms	340 KB	Output is correct
42	Correct	289 ms	440 KB	Output is correct
43	Correct	285 ms	340 KB	Output is correct
44	Correct	236 ms	428 KB	Output is correct
45	Correct	180 ms	340 KB	Output is correct
46	Correct	191 ms	428 KB	Output is correct
47	Correct	191 ms	460 KB	Output is correct
48	Correct	240 ms	436 KB	Output is correct
49	Correct	209 ms	340 KB	Output is correct
50	Correct	186 ms	432 KB	Output is correct
51	Correct	195 ms	432 KB	Output is correct
52	Correct	277 ms	452 KB	Output is correct

Subtask #4

0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	340 KB	Output is correct
2	Correct	0 ms	340 KB	Output is correct
3	Correct	0 ms	340 KB	Output is correct
4	Correct	0 ms	340 KB	Output is correct
5	Correct	1 ms	340 KB	Output is correct
6	Correct	0 ms	340 KB	Output is correct
7	Correct	0 ms	340 KB	Output is correct
8	Correct	1 ms	340 KB	Output is correct
9	Correct	1 ms	340 KB	Output is correct
10	Correct	1 ms	340 KB	Output is correct
11	Correct	0 ms	340 KB	Output is correct
12	Correct	1 ms	340 KB	Output is correct
13	Correct	0 ms	340 KB	Output is correct
14	Correct	8 ms	332 KB	Output is correct
15	Correct	7 ms	400 KB	Output is correct
16	Correct	7 ms	396 KB	Output is correct
17	Correct	9 ms	340 KB	Output is correct
18	Correct	6 ms	340 KB	Output is correct
19	Correct	6 ms	340 KB	Output is correct
20	Correct	6 ms	340 KB	Output is correct
21	Correct	5 ms	340 KB	Output is correct
22	Correct	6 ms	400 KB	Output is correct
23	Correct	4 ms	340 KB	Output is correct
24	Correct	4 ms	340 KB	Output is correct
25	Correct	5 ms	340 KB	Output is correct
26	Correct	4 ms	340 KB	Output is correct
27	Correct	5 ms	340 KB	Output is correct
28	Correct	5 ms	328 KB	Output is correct
29	Correct	4 ms	340 KB	Output is correct
30	Correct	4 ms	340 KB	Output is correct
31	Correct	6 ms	340 KB	Output is correct
32	Correct	5 ms	340 KB	Output is correct
33	Correct	8 ms	324 KB	Output is correct
34	Correct	304 ms	432 KB	Output is correct
35	Correct	310 ms	444 KB	Output is correct
36	Correct	288 ms	340 KB	Output is correct
37	Correct	277 ms	424 KB	Output is correct
38	Correct	197 ms	428 KB	Output is correct
39	Correct	234 ms	440 KB	Output is correct
40	Correct	237 ms	428 KB	Output is correct
41	Correct	200 ms	340 KB	Output is correct
42	Correct	289 ms	440 KB	Output is correct
43	Correct	285 ms	340 KB	Output is correct
44	Correct	236 ms	428 KB	Output is correct
45	Correct	180 ms	340 KB	Output is correct
46	Correct	191 ms	428 KB	Output is correct
47	Correct	191 ms	460 KB	Output is correct
48	Correct	240 ms	436 KB	Output is correct
49	Correct	209 ms	340 KB	Output is correct
50	Correct	186 ms	432 KB	Output is correct
51	Correct	195 ms	432 KB	Output is correct
52	Correct	277 ms	452 KB	Output is correct
53	Execution timed out	2089 ms	7392 KB	Time limit exceeded
54	Halted	0 ms	0 KB	-