oj.uz

Submission #292589

# Submission time Handle Problem Language Result Execution time Memory
292589 2020-09-07T10:15:49 Z Pajaraja Monochrome Points (JOI20_monochrome) C++17
100 / 100
 166 ms 4240 KB 
#include <bits/stdc++.h>
#define MAXN 200007
using namespace std;
vector<int> b,w;
int dx[MAXN],dy[MAXN],n;
long long val(int x)
{
	long long solc=0;
	int k=x,p=x;
	for(int i=0;i<x;i++)
	{
		while(w[k-x]<b[i] && k<n) k++;
		while(b[p]<w[n-x+i] && p<n) p++;
		solc+=(n-max(k,p)+min(k,p)-x);
	}
	k=0;
	for(int i=0;i<x;i++) 
	{
		while(w[n-x+k]<b[i]) k++;
		solc+=(i-k);
	}
	k=x;
	for(int i=x;i<n;i++) 
	{
		while(b[k]<w[i-x]) k++;
		solc+=(i-k);
	}
	return solc;
}
bool validl(int x)
{
	for(int i=0;i<x;i++) {dx[i]=b[i]; dy[i]=w[n-x+i];}
	for(int i=x;i<n;i++) {dx[i]=b[i]; dy[i]=w[i-x];}
	for(int i=0;i<x;i++) if(dx[i]>dy[i]) return false;
	return true;
}

bool validr(int x)
{
	for(int i=0;i<x;i++) {dx[i]=b[i]; dy[i]=w[n-x+i];}
	for(int i=x;i<n;i++) {dx[i]=b[i]; dy[i]=w[i-x];}
	for(int i=x;i<n;i++) if(dx[i]<dy[i]) return false;
	return true;
}
int main()
{
	string s;
	cin>>n; cin>>s;
	for(int i=0;i<2*n;i++) 
	{
		if(s[i]=='W') w.push_back(i);
		else b.push_back(i);
	}
	long long sol=0;
	int r=n,l=0,rzl,rzr;
	while(l!=r)
	{
		int s=(l+r)/2;
		if(validr(s)) r=s;
		else l=s+1;
	}
	rzl=l;
	r=n; l=0;
	while(l!=r)
	{
		int s=(l+r+1)/2;
		if(validl(s)) l=s;
		else r=s-1;
	}
	rzr=r;
	l=rzl; r=rzr;
	while(r-l>3)
	{
		int s1=(l+r)/2-1;
		int s2=(l+r)/2+1;
		int x=val(s1),y=val(s2);
		if(x<y) l=s1;
		else r=s2;
	}
	for(int i=l;i<=r;i++) sol=max(sol,val(i));
	cout<<sol;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 0 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 0 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 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 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 0 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 0 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 0 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 0 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 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 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 0 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 0 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 2 ms 384 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 416 KB Output is correct
43 Correct 1 ms 424 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 4 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 1 ms 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 1 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 384 KB Output is correct
15 Correct 0 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 0 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 0 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 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 0 ms 384 KB Output is correct
29 Correct 0 ms 384 KB Output is correct
30 Correct 0 ms 384 KB Output is correct
31 Correct 1 ms 384 KB Output is correct
32 Correct 0 ms 384 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 2 ms 384 KB Output is correct
36 Correct 1 ms 384 KB Output is correct
37 Correct 1 ms 384 KB Output is correct
38 Correct 1 ms 384 KB Output is correct
39 Correct 1 ms 384 KB Output is correct
40 Correct 1 ms 384 KB Output is correct
41 Correct 1 ms 384 KB Output is correct
42 Correct 1 ms 416 KB Output is correct
43 Correct 1 ms 424 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 4 ms 384 KB Output is correct
46 Correct 1 ms 384 KB Output is correct
47 Correct 1 ms 384 KB Output is correct
48 Correct 1 ms 384 KB Output is correct
49 Correct 1 ms 384 KB Output is correct
50 Correct 1 ms 384 KB Output is correct
51 Correct 1 ms 384 KB Output is correct
52 Correct 1 ms 384 KB Output is correct
53 Correct 144 ms 4232 KB Output is correct
54 Correct 144 ms 3916 KB Output is correct
55 Correct 138 ms 3812 KB Output is correct
56 Correct 138 ms 4100 KB Output is correct
57 Correct 53 ms 3980 KB Output is correct
58 Correct 100 ms 3976 KB Output is correct
59 Correct 86 ms 4112 KB Output is correct
60 Correct 166 ms 4104 KB Output is correct
61 Correct 60 ms 4108 KB Output is correct
62 Correct 62 ms 4112 KB Output is correct
63 Correct 78 ms 4104 KB Output is correct
64 Correct 63 ms 3860 KB Output is correct
65 Correct 63 ms 3976 KB Output is correct
66 Correct 62 ms 3732 KB Output is correct
67 Correct 60 ms 3852 KB Output is correct
68 Correct 50 ms 3604 KB Output is correct
69 Correct 53 ms 4140 KB Output is correct
70 Correct 45 ms 3600 KB Output is correct
71 Correct 33 ms 3988 KB Output is correct
72 Correct 32 ms 3988 KB Output is correct
73 Correct 59 ms 4240 KB Output is correct