답안 #623144

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
623144	2022-08-05T08:59:39 Z	S2speed	Monochrome Points (JOI20_monochrome)	C++17	100 / 100	1747 ms	10892 KB

monochrome

#include<bits/stdc++.h>

using namespace std;

#pragma GCC optimize ("Ofast")

typedef long long ll;
typedef pair<ll , ll> pll;

const ll maxn = 4e5 + 17;

ll n;
string s;
vector<ll> a , b;
ll ps[maxn] , c[maxn];

ll cal(ll k){
	if(c[k] != -1) return c[k];
	ll cur = 0;
	for(ll t = 0 ; t < n ; t++){
		ll i = a[t] , j = b[(t + k) % n];
		if(i < j){
			ll h1 = ps[j] - ps[i] , h0 = j - i - 1 - h1 , b0 = n - 1 - h0 , h = max(0ll , h1 - b0);
			cur += j - i - 1 - (h << 1);
		} else {
			ll d = (n << 1) - (i - j + 1) , h1 = n - ps[i] + ps[j] , h0 = d - h1 , b0 = n - 1 - h0 , h = max(0ll , h1 - b0);
			cur += d - (h << 1);
		}
	}
	cur >>= 1;
	return c[k] = cur;
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);

	memset(c , -1 , sizeof(c));
	cin>>n>>s;
    for(ll i = 0 ; i < (n << 1) ; i++){
		if(s[i] == 'B'){
			a.push_back(i);
		} else {
			b.push_back(i);
		}
	}
	ps[0] = (s[0] == 'B');
	for(ll i = 1 ; i < (n << 1) ; i++){
		ps[i] = ps[i - 1] + (s[i] == 'B');
	}
	ll sq = 500;
	ll res = 0;
	for(ll i = 0 ; i < n ; i += sq){
		c[i] = cal(i);
		res = max(res , c[i]);
	}
	bool f = false;
	for(ll i = sq ; i < n ; i += sq){
		f |= (c[i - sq] < c[i]);
		if(c[i - sq] >= c[i] && f){
			for(ll j = max(0ll , i - (sq << 1)) ; j <= i ; j++){
				res = max(res , cal(j));
			}
			cout<<res<<'\n';
			return 0;
		}
	}
	for(ll i = max(0ll , n - (sq << 1)) ; i < n ; i++){
		res = max(res , cal(i));
	}
	for(ll i = 0 ; i < sq ; i++){
		res = max(res , cal(i));
	}
	cout<<res<<'\n';
	return 0;
}

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	3412 KB	Output is correct
2	Correct	1 ms	3412 KB	Output is correct
3	Correct	1 ms	3412 KB	Output is correct
4	Correct	2 ms	3412 KB	Output is correct
5	Correct	2 ms	3412 KB	Output is correct
6	Correct	1 ms	3412 KB	Output is correct
7	Correct	1 ms	3412 KB	Output is correct
8	Correct	1 ms	3412 KB	Output is correct
9	Correct	1 ms	3412 KB	Output is correct
10	Correct	2 ms	3412 KB	Output is correct
11	Correct	1 ms	3412 KB	Output is correct
12	Correct	2 ms	3412 KB	Output is correct
13	Correct	2 ms	3412 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	3412 KB	Output is correct
2	Correct	1 ms	3412 KB	Output is correct
3	Correct	1 ms	3412 KB	Output is correct
4	Correct	2 ms	3412 KB	Output is correct
5	Correct	2 ms	3412 KB	Output is correct
6	Correct	1 ms	3412 KB	Output is correct
7	Correct	1 ms	3412 KB	Output is correct
8	Correct	1 ms	3412 KB	Output is correct
9	Correct	1 ms	3412 KB	Output is correct
10	Correct	2 ms	3412 KB	Output is correct
11	Correct	1 ms	3412 KB	Output is correct
12	Correct	2 ms	3412 KB	Output is correct
13	Correct	2 ms	3412 KB	Output is correct
14	Correct	3 ms	3412 KB	Output is correct
15	Correct	2 ms	3412 KB	Output is correct
16	Correct	3 ms	3412 KB	Output is correct
17	Correct	2 ms	3412 KB	Output is correct
18	Correct	3 ms	3412 KB	Output is correct
19	Correct	2 ms	3412 KB	Output is correct
20	Correct	2 ms	3412 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	2 ms	3412 KB	Output is correct
23	Correct	2 ms	3412 KB	Output is correct
24	Correct	2 ms	3412 KB	Output is correct
25	Correct	2 ms	3412 KB	Output is correct
26	Correct	2 ms	3412 KB	Output is correct
27	Correct	2 ms	3412 KB	Output is correct
28	Correct	2 ms	3412 KB	Output is correct
29	Correct	2 ms	3412 KB	Output is correct
30	Correct	2 ms	3412 KB	Output is correct
31	Correct	2 ms	3412 KB	Output is correct
32	Correct	2 ms	3412 KB	Output is correct
33	Correct	3 ms	3412 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	3412 KB	Output is correct
2	Correct	1 ms	3412 KB	Output is correct
3	Correct	1 ms	3412 KB	Output is correct
4	Correct	2 ms	3412 KB	Output is correct
5	Correct	2 ms	3412 KB	Output is correct
6	Correct	1 ms	3412 KB	Output is correct
7	Correct	1 ms	3412 KB	Output is correct
8	Correct	1 ms	3412 KB	Output is correct
9	Correct	1 ms	3412 KB	Output is correct
10	Correct	2 ms	3412 KB	Output is correct
11	Correct	1 ms	3412 KB	Output is correct
12	Correct	2 ms	3412 KB	Output is correct
13	Correct	2 ms	3412 KB	Output is correct
14	Correct	3 ms	3412 KB	Output is correct
15	Correct	2 ms	3412 KB	Output is correct
16	Correct	3 ms	3412 KB	Output is correct
17	Correct	2 ms	3412 KB	Output is correct
18	Correct	3 ms	3412 KB	Output is correct
19	Correct	2 ms	3412 KB	Output is correct
20	Correct	2 ms	3412 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	2 ms	3412 KB	Output is correct
23	Correct	2 ms	3412 KB	Output is correct
24	Correct	2 ms	3412 KB	Output is correct
25	Correct	2 ms	3412 KB	Output is correct
26	Correct	2 ms	3412 KB	Output is correct
27	Correct	2 ms	3412 KB	Output is correct
28	Correct	2 ms	3412 KB	Output is correct
29	Correct	2 ms	3412 KB	Output is correct
30	Correct	2 ms	3412 KB	Output is correct
31	Correct	2 ms	3412 KB	Output is correct
32	Correct	2 ms	3412 KB	Output is correct
33	Correct	3 ms	3412 KB	Output is correct
34	Correct	11 ms	3540 KB	Output is correct
35	Correct	11 ms	3540 KB	Output is correct
36	Correct	11 ms	3556 KB	Output is correct
37	Correct	11 ms	3556 KB	Output is correct
38	Correct	10 ms	3540 KB	Output is correct
39	Correct	11 ms	3540 KB	Output is correct
40	Correct	10 ms	3540 KB	Output is correct
41	Correct	9 ms	3544 KB	Output is correct
42	Correct	11 ms	3540 KB	Output is correct
43	Correct	17 ms	3432 KB	Output is correct
44	Correct	10 ms	3540 KB	Output is correct
45	Correct	15 ms	3544 KB	Output is correct
46	Correct	15 ms	3540 KB	Output is correct
47	Correct	15 ms	3540 KB	Output is correct
48	Correct	11 ms	3540 KB	Output is correct
49	Correct	10 ms	3540 KB	Output is correct
50	Correct	16 ms	3548 KB	Output is correct
51	Correct	15 ms	3540 KB	Output is correct
52	Correct	11 ms	3540 KB	Output is correct

Subtask #4
65.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	3412 KB	Output is correct
2	Correct	1 ms	3412 KB	Output is correct
3	Correct	1 ms	3412 KB	Output is correct
4	Correct	2 ms	3412 KB	Output is correct
5	Correct	2 ms	3412 KB	Output is correct
6	Correct	1 ms	3412 KB	Output is correct
7	Correct	1 ms	3412 KB	Output is correct
8	Correct	1 ms	3412 KB	Output is correct
9	Correct	1 ms	3412 KB	Output is correct
10	Correct	2 ms	3412 KB	Output is correct
11	Correct	1 ms	3412 KB	Output is correct
12	Correct	2 ms	3412 KB	Output is correct
13	Correct	2 ms	3412 KB	Output is correct
14	Correct	3 ms	3412 KB	Output is correct
15	Correct	2 ms	3412 KB	Output is correct
16	Correct	3 ms	3412 KB	Output is correct
17	Correct	2 ms	3412 KB	Output is correct
18	Correct	3 ms	3412 KB	Output is correct
19	Correct	2 ms	3412 KB	Output is correct
20	Correct	2 ms	3412 KB	Output is correct
21	Correct	2 ms	3412 KB	Output is correct
22	Correct	2 ms	3412 KB	Output is correct
23	Correct	2 ms	3412 KB	Output is correct
24	Correct	2 ms	3412 KB	Output is correct
25	Correct	2 ms	3412 KB	Output is correct
26	Correct	2 ms	3412 KB	Output is correct
27	Correct	2 ms	3412 KB	Output is correct
28	Correct	2 ms	3412 KB	Output is correct
29	Correct	2 ms	3412 KB	Output is correct
30	Correct	2 ms	3412 KB	Output is correct
31	Correct	2 ms	3412 KB	Output is correct
32	Correct	2 ms	3412 KB	Output is correct
33	Correct	3 ms	3412 KB	Output is correct
34	Correct	11 ms	3540 KB	Output is correct
35	Correct	11 ms	3540 KB	Output is correct
36	Correct	11 ms	3556 KB	Output is correct
37	Correct	11 ms	3556 KB	Output is correct
38	Correct	10 ms	3540 KB	Output is correct
39	Correct	11 ms	3540 KB	Output is correct
40	Correct	10 ms	3540 KB	Output is correct
41	Correct	9 ms	3544 KB	Output is correct
42	Correct	11 ms	3540 KB	Output is correct
43	Correct	17 ms	3432 KB	Output is correct
44	Correct	10 ms	3540 KB	Output is correct
45	Correct	15 ms	3544 KB	Output is correct
46	Correct	15 ms	3540 KB	Output is correct
47	Correct	15 ms	3540 KB	Output is correct
48	Correct	11 ms	3540 KB	Output is correct
49	Correct	10 ms	3540 KB	Output is correct
50	Correct	16 ms	3548 KB	Output is correct
51	Correct	15 ms	3540 KB	Output is correct
52	Correct	11 ms	3540 KB	Output is correct
53	Correct	1281 ms	10608 KB	Output is correct
54	Correct	1275 ms	10884 KB	Output is correct
55	Correct	1194 ms	10580 KB	Output is correct
56	Correct	1215 ms	10620 KB	Output is correct
57	Correct	1235 ms	10332 KB	Output is correct
58	Correct	1273 ms	10632 KB	Output is correct
59	Correct	1217 ms	10588 KB	Output is correct
60	Correct	1224 ms	10392 KB	Output is correct
61	Correct	1241 ms	10448 KB	Output is correct
62	Correct	1238 ms	10464 KB	Output is correct
63	Correct	1233 ms	10580 KB	Output is correct
64	Correct	1229 ms	10344 KB	Output is correct
65	Correct	1153 ms	10052 KB	Output is correct
66	Correct	1202 ms	10268 KB	Output is correct
67	Correct	1228 ms	10284 KB	Output is correct
68	Correct	1128 ms	9960 KB	Output is correct
69	Correct	1288 ms	10584 KB	Output is correct
70	Correct	1148 ms	9992 KB	Output is correct
71	Correct	1747 ms	10708 KB	Output is correct
72	Correct	1733 ms	10636 KB	Output is correct
73	Correct	1298 ms	10892 KB	Output is correct

답안 #623144

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