답안 #709723

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
709723	2023-03-14T09:03:24 Z	Antekb	Monochrome Points (JOI20_monochrome)	C++17	100 / 100	1367 ms	9436 KB

monochrome

#include<bits/stdc++.h>

#define st first
#define nd second
#define eb emplace_back
#define pb push_back
#define mp make_pair
#define pp pop_back
#define all(x) x.begin(), x.end()

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

void debug(){cerr<<"\n";}
template<typename H, typename... T>
void debug(H h, T... t){cerr<<h;if(sizeof...(t))cerr<<", ";debug(t...);};
#define deb(x...) cerr<<#x<<" = ";debug(x);

mt19937 rng(chrono::high_resolution_clock::now().time_since_epoch().count());

const int N=1<<19, INF=1e9+5;
int tab[N+N];
void add(int v, int c){
	for(v+=N; v; v>>=1)tab[v]+=c;
}
int sum(int l, int r){
	int ans=0;
	for(l+=N,r+=N; l<r; l>>=1, r>>=1){
		if(l&1)ans+=tab[l++];
		if(r&1)ans+=tab[--r];
	}
	return ans;
}
vi A, B;
int n;
ll solve(int a){
	int wsk=n, wsk2=n;
	vector<pii> V(n);
	for(int i=0; i<a; i++){
		//deb(wsk, wsk2);
		V[i]=mp(A[i], B[n-a+i]);
	}
	for(int i=a; i<n; i++){
		V[i]=mp(A[i], B[i-a]);
	}
	for(pii &i:V)if(i.st>i.nd)swap(i.st, i.nd);
	sort(all(V));
	ll ans=0;
	for(int i=0; i<n; i++){
		//deb(V[i]);
		//deb(V[i].st, V[i].nd);
		ans+=sum(V[i].st, V[i].nd);
		add(V[i].nd, 1);
	}
	for(int i=0; i<n; i++){
		add(V[i].nd, -1);
	}
	//deb(ans);
	return ans;
}
ll res[N];
ll ans;
ll getans(int t){
	t%=n;
	if(res[t]==-1)res[t]=solve(t);
	ans=max(ans, res[t]);
	return res[t];
}
int main(){
	//ios_base::sync_with_stdio(0);cin.tie(0);
	cin>>n;
	string s;
	cin>>s;
	for(int i=0; i<n+n; i++){
		if(s[i]=='B')A.pb(i);
		else B.pb(i);
	}
	for(int i=0; i<n; i++){
		res[i]=-1ll;
		//deb(getans(i));
	}
	if(n<=10){
		for(int i=0;i<n; i++)getans(i);
	}
	else{
		int k=n/8;
		for(int i=0; ;i+=k){
			if(getans(i)<=getans(i+1) && getans(i+k)>getans(i+k+1)){
				int l=i+1, r=i+k;
				while(l<r){
					int m=(l+r)>>1;
					if(getans(m)<=getans(m+1))l=m+1;
					else r=m;
				}
				getans(r);
				break;
			}
		}
	}
	cout<<ans;
}

Compilation message

monochrome.cpp: In function 'll solve(int)':
monochrome.cpp:40:6: warning: unused variable 'wsk' [-Wunused-variable]
   40 |  int wsk=n, wsk2=n;
      |      ^~~
monochrome.cpp:40:13: warning: unused variable 'wsk2' [-Wunused-variable]
   40 |  int wsk=n, wsk2=n;
      |             ^~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 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	0 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	0 ms	340 KB	Output is correct
9	Correct	0 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	1 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	0 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	0 ms	340 KB	Output is correct
9	Correct	0 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	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Correct	1 ms	340 KB	Output is correct
32	Correct	1 ms	340 KB	Output is correct
33	Correct	2 ms	340 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 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	0 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	0 ms	340 KB	Output is correct
9	Correct	0 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	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Correct	1 ms	340 KB	Output is correct
32	Correct	1 ms	340 KB	Output is correct
33	Correct	2 ms	340 KB	Output is correct
34	Correct	7 ms	340 KB	Output is correct
35	Correct	7 ms	340 KB	Output is correct
36	Correct	8 ms	340 KB	Output is correct
37	Correct	7 ms	340 KB	Output is correct
38	Correct	6 ms	464 KB	Output is correct
39	Correct	6 ms	340 KB	Output is correct
40	Correct	6 ms	444 KB	Output is correct
41	Correct	6 ms	340 KB	Output is correct
42	Correct	7 ms	340 KB	Output is correct
43	Correct	5 ms	340 KB	Output is correct
44	Correct	6 ms	340 KB	Output is correct
45	Correct	7 ms	448 KB	Output is correct
46	Correct	7 ms	340 KB	Output is correct
47	Correct	5 ms	340 KB	Output is correct
48	Correct	6 ms	340 KB	Output is correct
49	Correct	5 ms	340 KB	Output is correct
50	Correct	6 ms	340 KB	Output is correct
51	Correct	7 ms	440 KB	Output is correct
52	Correct	6 ms	340 KB	Output is correct

Subtask #4
65.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 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	0 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	0 ms	340 KB	Output is correct
9	Correct	0 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	1 ms	340 KB	Output is correct
15	Correct	1 ms	340 KB	Output is correct
16	Correct	1 ms	340 KB	Output is correct
17	Correct	1 ms	340 KB	Output is correct
18	Correct	1 ms	340 KB	Output is correct
19	Correct	1 ms	340 KB	Output is correct
20	Correct	1 ms	340 KB	Output is correct
21	Correct	1 ms	340 KB	Output is correct
22	Correct	1 ms	340 KB	Output is correct
23	Correct	1 ms	340 KB	Output is correct
24	Correct	1 ms	340 KB	Output is correct
25	Correct	1 ms	340 KB	Output is correct
26	Correct	1 ms	340 KB	Output is correct
27	Correct	1 ms	340 KB	Output is correct
28	Correct	1 ms	340 KB	Output is correct
29	Correct	1 ms	340 KB	Output is correct
30	Correct	1 ms	340 KB	Output is correct
31	Correct	1 ms	340 KB	Output is correct
32	Correct	1 ms	340 KB	Output is correct
33	Correct	2 ms	340 KB	Output is correct
34	Correct	7 ms	340 KB	Output is correct
35	Correct	7 ms	340 KB	Output is correct
36	Correct	8 ms	340 KB	Output is correct
37	Correct	7 ms	340 KB	Output is correct
38	Correct	6 ms	464 KB	Output is correct
39	Correct	6 ms	340 KB	Output is correct
40	Correct	6 ms	444 KB	Output is correct
41	Correct	6 ms	340 KB	Output is correct
42	Correct	7 ms	340 KB	Output is correct
43	Correct	5 ms	340 KB	Output is correct
44	Correct	6 ms	340 KB	Output is correct
45	Correct	7 ms	448 KB	Output is correct
46	Correct	7 ms	340 KB	Output is correct
47	Correct	5 ms	340 KB	Output is correct
48	Correct	6 ms	340 KB	Output is correct
49	Correct	5 ms	340 KB	Output is correct
50	Correct	6 ms	340 KB	Output is correct
51	Correct	7 ms	440 KB	Output is correct
52	Correct	6 ms	340 KB	Output is correct
53	Correct	1338 ms	8916 KB	Output is correct
54	Correct	1367 ms	9436 KB	Output is correct
55	Correct	1220 ms	8844 KB	Output is correct
56	Correct	1224 ms	8888 KB	Output is correct
57	Correct	843 ms	8060 KB	Output is correct
58	Correct	940 ms	8672 KB	Output is correct
59	Correct	958 ms	8344 KB	Output is correct
60	Correct	960 ms	8936 KB	Output is correct
61	Correct	1078 ms	9056 KB	Output is correct
62	Correct	1080 ms	9052 KB	Output is correct
63	Correct	1137 ms	8964 KB	Output is correct
64	Correct	1026 ms	8164 KB	Output is correct
65	Correct	1100 ms	8576 KB	Output is correct
66	Correct	1055 ms	8544 KB	Output is correct
67	Correct	1058 ms	8636 KB	Output is correct
68	Correct	824 ms	8156 KB	Output is correct
69	Correct	865 ms	8328 KB	Output is correct
70	Correct	849 ms	7232 KB	Output is correct
71	Correct	845 ms	7524 KB	Output is correct
72	Correct	1137 ms	7520 KB	Output is correct
73	Correct	1172 ms	9268 KB	Output is correct

답안 #709723

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