답안 #411575

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
411575	2021-05-25T14:27:22 Z	nichke	Monochrome Points (JOI20_monochrome)	C++14	100 / 100	1229 ms	14884 KB

monochrome

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl '\n'

int ans;
int n;
string s;

vector<int> a, b;
int bit[400005];

void clr() {
	for (int i = 1; i <= 2 * n; i++) {
		bit[i] = 0;
	}
}

void upd(int v, int k) {
	while (v <= 2 * n) {
		bit[v] += k;
		v += (v & (-v));
	}
}

int qry(int v) {
	int res = 0;
	while (v) {
		res += bit[v];
		v -= (v & (-v));
	}
	return res;
}

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

int calc(int k) {
	int res = 0;
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		v.push_back({a[i], b[(i + k) % n]});
	}
	for (int i = 0; i < v.size(); i++) {
		if (v[i].first > v[i].second) {
			swap(v[i].first, v[i].second);
		}
	}
	sort(v.begin(), v.end());
	clr();
	for (int i = 0; i < v.size(); i++) {
		res += sum(v[i].first, v[i].second);
		upd(v[i].second, 1);
	}
	return res;
}

signed main() {
	ios_base::sync_with_stdio(0);
	cin.tie(0);
	cin >> n >> s;
	for (int i = 0; i < 2 * n; i++) {
		if (s[i] == 'W') {
			a.push_back(i + 1);
		} else {
			b.push_back(i + 1);
		}
	}
	ans = max(calc(0), calc(n - 1));
	int l = 0, r = n - 2;
	while (l <= r) {
		int m = (l + r) / 2;
		int a = calc(m);
		int b = calc(m + 1);
		ans = max(ans, max(a, b));
		if (a < b) {
			l = m + 1;
		} else {
			r = m - 1;
		}
	}
	cout << ans << '\n';
	return 0;
}

Compilation message

monochrome.cpp: In function 'long long int calc(long long int)':
monochrome.cpp:45:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~
monochrome.cpp:52:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |  for (int i = 0; i < v.size(); i++) {
      |                  ~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	2 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	2 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	5 ms	332 KB	Output is correct
35	Correct	6 ms	460 KB	Output is correct
36	Correct	5 ms	332 KB	Output is correct
37	Correct	5 ms	456 KB	Output is correct
38	Correct	4 ms	332 KB	Output is correct
39	Correct	5 ms	332 KB	Output is correct
40	Correct	4 ms	332 KB	Output is correct
41	Correct	4 ms	332 KB	Output is correct
42	Correct	5 ms	460 KB	Output is correct
43	Correct	5 ms	332 KB	Output is correct
44	Correct	5 ms	452 KB	Output is correct
45	Correct	4 ms	452 KB	Output is correct
46	Correct	5 ms	332 KB	Output is correct
47	Correct	6 ms	452 KB	Output is correct
48	Correct	4 ms	460 KB	Output is correct
49	Correct	4 ms	460 KB	Output is correct
50	Correct	5 ms	332 KB	Output is correct
51	Correct	3 ms	452 KB	Output is correct
52	Correct	5 ms	460 KB	Output is correct

Subtask #4
65.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	204 KB	Output is correct
2	Correct	1 ms	204 KB	Output is correct
3	Correct	1 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	1 ms	204 KB	Output is correct
6	Correct	1 ms	204 KB	Output is correct
7	Correct	1 ms	204 KB	Output is correct
8	Correct	1 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	1 ms	204 KB	Output is correct
13	Correct	1 ms	204 KB	Output is correct
14	Correct	1 ms	332 KB	Output is correct
15	Correct	1 ms	332 KB	Output is correct
16	Correct	1 ms	332 KB	Output is correct
17	Correct	1 ms	332 KB	Output is correct
18	Correct	1 ms	332 KB	Output is correct
19	Correct	1 ms	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	2 ms	332 KB	Output is correct
25	Correct	1 ms	332 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	1 ms	332 KB	Output is correct
31	Correct	1 ms	332 KB	Output is correct
32	Correct	1 ms	332 KB	Output is correct
33	Correct	1 ms	332 KB	Output is correct
34	Correct	5 ms	332 KB	Output is correct
35	Correct	6 ms	460 KB	Output is correct
36	Correct	5 ms	332 KB	Output is correct
37	Correct	5 ms	456 KB	Output is correct
38	Correct	4 ms	332 KB	Output is correct
39	Correct	5 ms	332 KB	Output is correct
40	Correct	4 ms	332 KB	Output is correct
41	Correct	4 ms	332 KB	Output is correct
42	Correct	5 ms	460 KB	Output is correct
43	Correct	5 ms	332 KB	Output is correct
44	Correct	5 ms	452 KB	Output is correct
45	Correct	4 ms	452 KB	Output is correct
46	Correct	5 ms	332 KB	Output is correct
47	Correct	6 ms	452 KB	Output is correct
48	Correct	4 ms	460 KB	Output is correct
49	Correct	4 ms	460 KB	Output is correct
50	Correct	5 ms	332 KB	Output is correct
51	Correct	3 ms	452 KB	Output is correct
52	Correct	5 ms	460 KB	Output is correct
53	Correct	1203 ms	14220 KB	Output is correct
54	Correct	1219 ms	14880 KB	Output is correct
55	Correct	1075 ms	14280 KB	Output is correct
56	Correct	1121 ms	14348 KB	Output is correct
57	Correct	946 ms	14524 KB	Output is correct
58	Correct	908 ms	14688 KB	Output is correct
59	Correct	960 ms	14332 KB	Output is correct
60	Correct	988 ms	14340 KB	Output is correct
61	Correct	1103 ms	14444 KB	Output is correct
62	Correct	1016 ms	14604 KB	Output is correct
63	Correct	1086 ms	14292 KB	Output is correct
64	Correct	847 ms	14324 KB	Output is correct
65	Correct	1078 ms	13888 KB	Output is correct
66	Correct	999 ms	14216 KB	Output is correct
67	Correct	1040 ms	14168 KB	Output is correct
68	Correct	821 ms	13636 KB	Output is correct
69	Correct	917 ms	14664 KB	Output is correct
70	Correct	865 ms	13724 KB	Output is correct
71	Correct	1229 ms	14780 KB	Output is correct
72	Correct	796 ms	14776 KB	Output is correct
73	Correct	1207 ms	14884 KB	Output is correct

답안 #411575

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 65.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
65.0 / 65.0