oj.uz

Submission #292592

# Submission time Handle Problem Language Result Execution time Memory
292592 2020-09-07T10:20:24 Z kshitij_sodani Monochrome Points (JOI20_monochrome) C++14
100 / 100
 1282 ms 18884 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
//#define endl '\n' 


int n;
vector<int> aa;
vector<int> bb;
bool sect(int cc,int dd,int ee,int ff){
	if(cc>dd){
		swap(cc,dd);
	}
	if(ee>ff){
		swap(ee,ff);
	}
	if(cc>ee){
		swap(cc,ee);
		swap(dd,ff);
	}


	if(cc<=ee and ee<=dd and dd<=ff){
		return true;
	}

	return false;
}
int tree[400001];
int vis[400001];
void u(int i,int j){
	while(i<400001){
		tree[i]+=j;
		i+=(i&-i);
	}
}
int stt(int i){
	int su=0;
	while(i>0){
		su+=tree[i];
		i-=(i&-i);
	}
	return su;
}
llo vis2[200001];
pair<int,int> sto[400001];
llo val(int ii){
	if(vis2[ii]>-1){
		return vis2[ii];
	}
	vector<int> ss;
	for(int i=ii;i<n;i++){
		ss.pb(bb[i]);
	}
	for(int i=0;i<ii;i++){
		ss.pb(bb[i]);
	}
	llo co=0;
	vector<pair<int,int>> mm;
	for(int i=0;i<n;i++){
	//	mm.pb({aa[i],i});
	//	mm.pb({ss[i],i});
		sto[aa[i]]={aa[i],i};
		sto[ss[i]]={ss[i],i};
	}
	for(int i=0;i<2*n;i++){
		mm.pb(sto[i]);
	}
	for(int j=0;j<2*n;j++){
		tree[j+1]=0;
		vis[j]=0;
	}
//	sort(mm.begin(),mm.end());
	for(auto j:mm){
		if(vis[j.b]){
			co+=stt(j.a+1)-stt(vis[j.b]+1);
			u(vis[j.b]+1,-1);
		}
		else{
			vis[j.b]=j.a;
			u(j.a+1,1);
		}
	}
	vis2[ii]=co;
	return co;
}
llo cal(int  x,int y){
	int low=x;
	int high=y;
	while(low<high-1){
		int mid=(low+high)/2;
		int xx=val(mid);
		int yy=val(mid+1);
		if(xx<yy){
			low=mid+1;
		}
		else{
			high=mid;
		}
	}
	llo ma=0;
	for(int i=low;i<=high;i++){
		ma=max(ma,val(i));
	}





	return ma;
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n;
		for(int i=0;i<n;i++){
			vis2[i]=-1;
		}

	for(int i=0;i<2*n;i++){
		char cc;
		cin>>cc;
		if(cc=='B'){
			aa.pb(i);
		}	
		else{
			bb.pb(i);
		}
	}
	/*if(n>10){
		return 0;
	}*/
	vector<int> ss;
	for(auto j:bb){
		ss.pb(j);
	}
	llo ans=0;
	/*vector<int> pp;
	for(int jj=0;jj<n;jj++){
		ans=max(ans,val(jj));
	}*/
	ans=val(n-1);
	llo xx=val(0);
	llo ans2=0;
	

	if(xx<ans){
		int low=0;
		int high=n-1;
		while(low<high-1){
			int mid=(low+high)/2;
			if(val(mid)<ans){
				low=mid+1;
			}
			else{
				high=mid;
			}
		}
		int ind=high;
		if(val(low)>=ans){
			ind=min(ind,low);
		}
		ans2=max(ans2,cal(ind,n-1));
/*	for(int j=ind;j<n;j++){
		ans=max(ans,val(j));
	}*/
   	 }
   	 if(xx>=ans){
   	 	int low=0;
		int high=n-1;
		while(low<high-1){
			int mid=(low+high)/2;
			if(val(mid)>=ans){
				low=mid;
			}
			else{
				high=mid;
			}
		}
		int ind=low;
		if(val(high)>=ans){
			ind=max(ind,high);
		}
	/*	for(int i=0;i<=ind;i++){
			ans=max(ans,val(i));
		}*/
		ans2=max(ans2,(cal(0,ind)));
   	 }


	/*int pop=0;
	for(int ii=0;ii<n;ii++){
		vector<int> tt;
		for(int j=ii;j<n;j++){
			tt.pb(pp[j]);
		}
		for(int j=0;j<ii;j++){
			tt.pb(pp[j]);
		}
		int kk=1;
		for(int i=1;i<n-1;i++){
			if(tt[i]<tt[i+1] and tt[i]<tt[i-1]){
				kk=0;
			}
		}
		for(int i=0;i<n;i++){
			if(tt[i]==tt[(i+1)%n]){
				kk=0;
			}
		}

		pop=max(pop,kk);


	}*/
/*	if(pop==0){
		while(true){
			continue;
		}
	}*/
	cout<<ans2<<endl;
	/*for(auto j:pp){
		cout<<j<<",";
	}
	cout<<endl;*/



	return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 2 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 2 ms 384 KB Output is correct
34 Correct 8 ms 512 KB Output is correct
35 Correct 7 ms 512 KB Output is correct
36 Correct 8 ms 512 KB Output is correct
37 Correct 7 ms 512 KB Output is correct
38 Correct 7 ms 512 KB Output is correct
39 Correct 8 ms 512 KB Output is correct
40 Correct 7 ms 512 KB Output is correct
41 Correct 7 ms 512 KB Output is correct
42 Correct 8 ms 512 KB Output is correct
43 Correct 6 ms 512 KB Output is correct
44 Correct 8 ms 512 KB Output is correct
45 Correct 6 ms 512 KB Output is correct
46 Correct 6 ms 512 KB Output is correct
47 Correct 6 ms 512 KB Output is correct
48 Correct 7 ms 512 KB Output is correct
49 Correct 7 ms 512 KB Output is correct
50 Correct 3 ms 512 KB Output is correct
51 Correct 3 ms 512 KB Output is correct
52 Correct 7 ms 512 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 384 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 1 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 1 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 1 ms 384 KB Output is correct
33 Correct 2 ms 384 KB Output is correct
34 Correct 8 ms 512 KB Output is correct
35 Correct 7 ms 512 KB Output is correct
36 Correct 8 ms 512 KB Output is correct
37 Correct 7 ms 512 KB Output is correct
38 Correct 7 ms 512 KB Output is correct
39 Correct 8 ms 512 KB Output is correct
40 Correct 7 ms 512 KB Output is correct
41 Correct 7 ms 512 KB Output is correct
42 Correct 8 ms 512 KB Output is correct
43 Correct 6 ms 512 KB Output is correct
44 Correct 8 ms 512 KB Output is correct
45 Correct 6 ms 512 KB Output is correct
46 Correct 6 ms 512 KB Output is correct
47 Correct 6 ms 512 KB Output is correct
48 Correct 7 ms 512 KB Output is correct
49 Correct 7 ms 512 KB Output is correct
50 Correct 3 ms 512 KB Output is correct
51 Correct 3 ms 512 KB Output is correct
52 Correct 7 ms 512 KB Output is correct
53 Correct 1282 ms 18756 KB Output is correct
54 Correct 1244 ms 18744 KB Output is correct
55 Correct 1200 ms 18116 KB Output is correct
56 Correct 1213 ms 18264 KB Output is correct
57 Correct 1150 ms 18272 KB Output is correct
58 Correct 1169 ms 18700 KB Output is correct
59 Correct 1099 ms 18196 KB Output is correct
60 Correct 1139 ms 18320 KB Output is correct
61 Correct 1169 ms 18568 KB Output is correct
62 Correct 1185 ms 18752 KB Output is correct
63 Correct 1153 ms 18252 KB Output is correct
64 Correct 1067 ms 18436 KB Output is correct
65 Correct 1115 ms 17872 KB Output is correct
66 Correct 1004 ms 18112 KB Output is correct
67 Correct 998 ms 18096 KB Output is correct
68 Correct 945 ms 17420 KB Output is correct
69 Correct 1196 ms 18884 KB Output is correct
70 Correct 1040 ms 17600 KB Output is correct
71 Correct 457 ms 18680 KB Output is correct
72 Correct 459 ms 18668 KB Output is correct
73 Correct 1150 ms 18824 KB Output is correct