답안 #855302

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
855302	2023-10-01T05:23:22 Z	willychan	Chorus (JOI23_chorus)	C++14	61 / 100	3634 ms	12004 KB

chorus

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
//#include<bits/extc++.h>
//__gnu_pbds
#define int ll
const int N = 1e6+5;
pair<ll,int> dp[N];
int Bpa[N];
ll Bpasum[N];
int n,K;

ll cost(int i,int j){
	int l = i;
	int r = j+1;
	while(r-l>1){
		int mid = (l+r)/2;
		if(Bpa[mid]<j) l = mid;
		else r = mid;
	}
	int cnt = l-i;
	ll ans = Bpasum[l]-Bpasum[i];
	return cnt*j-ans;	
}

struct seg{
	int pos;int l;int r;
	seg(int _pos,int _l,int _r):pos(_pos),l(_l),r(_r){}
};

bool ok(int v){
	for(int i=0;i<=n;i++) dp[i] = {1e18,0};
	dp[0]={0,0};
	dp[n+1] = {1e15,0};
	deque<seg> dq;
	dq.push_back(seg(0,1,n));
	for(int i=1;i<=n;i++){
		while(dq.size()){
			if(dq[0].r<i) dq.pop_front();
			else break;
		}
		dp[i] = {dp[dq[0].pos].first+cost(dq[0].pos,i)+v,dp[dq[0].pos].second+1};
		while(dq.size()){
			if(dp[dq.back().pos].first+cost(dq.back().pos,dq.back().l)>dp[i].first+cost(i,dq.back().l)) dq.pop_back();
			else break;
		}
		if(dq.empty()) dq.push_back(seg(i,i+1,n));
		else{
			seg pseg = dq.back();
			dq.pop_back();
			int l = pseg.l;int r = pseg.r+1;
			while(r-l>1){
				int mid = (l+r)/2;
				if(dp[pseg.pos].first+cost(pseg.pos,mid)>dp[i].first+cost(i,mid)) r=mid;
				else l = mid;
			}
			dq.push_back(seg(pseg.pos,pseg.l,l));
			if(l!=n) dq.push_back(seg(i,l+1,n));
		}
	}
	//cout<<(dp[n].second<=K)<<" "<<dp[n].first<<" "<<v<<"\n";
	return (dp[n].second<=K);
}
 
signed main(){
	ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
	cin>>n>>K;			
	string s;cin>>s;
	int pa = 0;
	int pb = 0;
	for(int i=1;i<=2*n;i++){
		if(s[i-1]=='A') pa++;
		if(s[i-1]=='B') Bpa[++pb]=pa;
	}
	for(int i=1;i<=n;i++){
		Bpasum[i] = Bpasum[i-1]+Bpa[i];
	}
	ll l = -1;ll r = 1e9;
	while(r-l>1){
		ll mid = l+((r-l)/2);
		if(ok(mid)) r = mid;
		else l = mid;
	}
	ok(r);
	//cout<<r<<"\n";
	cout<<dp[n].first-r*K<<"\n";
 
	return 0;
}

Subtask #1
16.0 / 16.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	4444 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	4444 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	1 ms	4440 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	2 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4444 KB	Output is correct

Subtask #2
24.0 / 24.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	4444 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	4444 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	1 ms	4440 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	2 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4444 KB	Output is correct
17	Correct	2 ms	4444 KB	Output is correct
18	Correct	7 ms	4572 KB	Output is correct
19	Correct	7 ms	4572 KB	Output is correct
20	Correct	10 ms	4572 KB	Output is correct
21	Correct	7 ms	4444 KB	Output is correct
22	Correct	7 ms	4444 KB	Output is correct
23	Correct	7 ms	4576 KB	Output is correct
24	Correct	7 ms	4444 KB	Output is correct
25	Correct	7 ms	4444 KB	Output is correct
26	Correct	7 ms	4444 KB	Output is correct
27	Correct	7 ms	4444 KB	Output is correct
28	Correct	7 ms	4556 KB	Output is correct

Subtask #3
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	4444 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	4444 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	1 ms	4440 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	2 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4444 KB	Output is correct
17	Correct	2 ms	4444 KB	Output is correct
18	Correct	7 ms	4572 KB	Output is correct
19	Correct	7 ms	4572 KB	Output is correct
20	Correct	10 ms	4572 KB	Output is correct
21	Correct	7 ms	4444 KB	Output is correct
22	Correct	7 ms	4444 KB	Output is correct
23	Correct	7 ms	4576 KB	Output is correct
24	Correct	7 ms	4444 KB	Output is correct
25	Correct	7 ms	4444 KB	Output is correct
26	Correct	7 ms	4444 KB	Output is correct
27	Correct	7 ms	4444 KB	Output is correct
28	Correct	7 ms	4556 KB	Output is correct
29	Correct	107 ms	4624 KB	Output is correct
30	Correct	106 ms	4620 KB	Output is correct
31	Correct	99 ms	4624 KB	Output is correct
32	Correct	158 ms	4608 KB	Output is correct
33	Correct	116 ms	4444 KB	Output is correct
34	Correct	111 ms	4628 KB	Output is correct
35	Correct	111 ms	4632 KB	Output is correct
36	Correct	113 ms	4444 KB	Output is correct
37	Correct	99 ms	4620 KB	Output is correct
38	Correct	116 ms	4440 KB	Output is correct
39	Correct	104 ms	4444 KB	Output is correct
40	Correct	90 ms	4608 KB	Output is correct
41	Correct	84 ms	4692 KB	Output is correct
42	Correct	146 ms	4444 KB	Output is correct

Subtask #4
0 / 26.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	4444 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	4444 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	1 ms	4440 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	2 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4444 KB	Output is correct
17	Correct	2 ms	4444 KB	Output is correct
18	Correct	7 ms	4572 KB	Output is correct
19	Correct	7 ms	4572 KB	Output is correct
20	Correct	10 ms	4572 KB	Output is correct
21	Correct	7 ms	4444 KB	Output is correct
22	Correct	7 ms	4444 KB	Output is correct
23	Correct	7 ms	4576 KB	Output is correct
24	Correct	7 ms	4444 KB	Output is correct
25	Correct	7 ms	4444 KB	Output is correct
26	Correct	7 ms	4444 KB	Output is correct
27	Correct	7 ms	4444 KB	Output is correct
28	Correct	7 ms	4556 KB	Output is correct
29	Correct	107 ms	4624 KB	Output is correct
30	Correct	106 ms	4620 KB	Output is correct
31	Correct	99 ms	4624 KB	Output is correct
32	Correct	158 ms	4608 KB	Output is correct
33	Correct	116 ms	4444 KB	Output is correct
34	Correct	111 ms	4628 KB	Output is correct
35	Correct	111 ms	4632 KB	Output is correct
36	Correct	113 ms	4444 KB	Output is correct
37	Correct	99 ms	4620 KB	Output is correct
38	Correct	116 ms	4440 KB	Output is correct
39	Correct	104 ms	4444 KB	Output is correct
40	Correct	90 ms	4608 KB	Output is correct
41	Correct	84 ms	4692 KB	Output is correct
42	Correct	146 ms	4444 KB	Output is correct
43	Correct	1453 ms	9196 KB	Output is correct
44	Correct	2631 ms	11484 KB	Output is correct
45	Correct	2605 ms	12004 KB	Output is correct
46	Incorrect	3634 ms	11828 KB	Output isn't correct
47	Halted	0 ms	0 KB	-

Subtask #5
0 / 13.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	4444 KB	Output is correct
2	Correct	1 ms	4444 KB	Output is correct
3	Correct	1 ms	4444 KB	Output is correct
4	Correct	1 ms	4444 KB	Output is correct
5	Correct	1 ms	4444 KB	Output is correct
6	Correct	1 ms	4440 KB	Output is correct
7	Correct	1 ms	4440 KB	Output is correct
8	Correct	1 ms	4444 KB	Output is correct
9	Correct	1 ms	4444 KB	Output is correct
10	Correct	1 ms	4444 KB	Output is correct
11	Correct	1 ms	4444 KB	Output is correct
12	Correct	1 ms	4444 KB	Output is correct
13	Correct	1 ms	4444 KB	Output is correct
14	Correct	2 ms	4444 KB	Output is correct
15	Correct	1 ms	4444 KB	Output is correct
16	Correct	1 ms	4444 KB	Output is correct
17	Correct	2 ms	4444 KB	Output is correct
18	Correct	7 ms	4572 KB	Output is correct
19	Correct	7 ms	4572 KB	Output is correct
20	Correct	10 ms	4572 KB	Output is correct
21	Correct	7 ms	4444 KB	Output is correct
22	Correct	7 ms	4444 KB	Output is correct
23	Correct	7 ms	4576 KB	Output is correct
24	Correct	7 ms	4444 KB	Output is correct
25	Correct	7 ms	4444 KB	Output is correct
26	Correct	7 ms	4444 KB	Output is correct
27	Correct	7 ms	4444 KB	Output is correct
28	Correct	7 ms	4556 KB	Output is correct
29	Correct	107 ms	4624 KB	Output is correct
30	Correct	106 ms	4620 KB	Output is correct
31	Correct	99 ms	4624 KB	Output is correct
32	Correct	158 ms	4608 KB	Output is correct
33	Correct	116 ms	4444 KB	Output is correct
34	Correct	111 ms	4628 KB	Output is correct
35	Correct	111 ms	4632 KB	Output is correct
36	Correct	113 ms	4444 KB	Output is correct
37	Correct	99 ms	4620 KB	Output is correct
38	Correct	116 ms	4440 KB	Output is correct
39	Correct	104 ms	4444 KB	Output is correct
40	Correct	90 ms	4608 KB	Output is correct
41	Correct	84 ms	4692 KB	Output is correct
42	Correct	146 ms	4444 KB	Output is correct
43	Correct	1453 ms	9196 KB	Output is correct
44	Correct	2631 ms	11484 KB	Output is correct
45	Correct	2605 ms	12004 KB	Output is correct
46	Incorrect	3634 ms	11828 KB	Output isn't correct
47	Halted	0 ms	0 KB	-

답안 #855302

Compilation message

Subtask #1 16.0 / 16.0

Subtask #2 24.0 / 24.0

Subtask #3 21.0 / 21.0

Subtask #4 0 / 26.0

Subtask #5 0 / 13.0

Subtask #1
16.0 / 16.0

Subtask #2
24.0 / 24.0

Subtask #3
21.0 / 21.0

Subtask #4
0 / 26.0

Subtask #5
0 / 13.0