oj.uz

Submission #292580

# Submission time Handle Problem Language Result Execution time Memory
292580 2020-09-07T10:06:10 Z model_code Monochrome Points (JOI20_monochrome) C++17
100 / 100
 42 ms 4840 KB 
#include <bits/stdc++.h>
#define SIZE 400005
using namespace std;
typedef pair <int,int> P;
typedef long long int ll;

char str[SIZE];
ll rt[SIZE];
int n;

void add(int l,int r,int k)
{
	if(l>r) return;
	while(l<0) l+=n,r+=n;
	while(1)
	{
		if(l/n!=r/n)
		{
			rt[l%n]+=k;
			rt[n]-=k;
			l=(l/n+1)*n;
		}
		else
		{
			rt[l%n]+=k;
			rt[r%n+1]-=k;
			break;
		}
	}
}
int main()
{
	scanf("%d",&n);
	scanf("%s",&str);
	vector <int> vb,vw;
	for(int i=0;i<2*n;i++)
	{
		if(str[i]=='B') vb.push_back(i);
		else vw.push_back(i);
	}
	for(int i=0;i<n;i++) vw.push_back(vw[i]+2*n);
	int s=0,t=0;
	for(int i=0;i<n;i++)
	{
		while(t<vw.size()&&vw[t]<=vb[i]+n) t++;
		while(s<vw.size()&&vw[s]<vb[i]) s++;
		add(s-i,t-i-1,-vb[i]-1);
		add(t-i,s+n-i-1,2*n+vb[i]-1);
	}
	s=t=0;
	int r=0;
	for(int i=0;i<2*n;i++)
	{
		while(t<vb.size()&&vb[t]<vw[i]) t++;
		while(s<vb.size()&&vb[s]<vw[i]-n) s++;
		while(r<vb.size()&&vb[r]<vw[i]-2*n) r++;
		add(i-t+1,i-s,vw[i]);
		add(i-s+1,i-r,-vw[i]);
	}
	for(int i=1;i<n;i++) rt[i]+=rt[i-1];
	ll ret=0;
	for(int i=0;i<n;i++) ret=max(ret,rt[i]);
	printf("%lld\n",ret/2);
}

Compilation message

monochrome.cpp: In function 'int main()':
monochrome.cpp:34:10: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[400005]' [-Wformat=]
   34 |  scanf("%s",&str);
      |         ~^  ~~~~
      |          |  |
      |          |  char (*)[400005]
      |          char*
monochrome.cpp:45:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   while(t<vw.size()&&vw[t]<=vb[i]+n) t++;
      |         ~^~~~~~~~~~
monochrome.cpp:46:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |   while(s<vw.size()&&vw[s]<vb[i]) s++;
      |         ~^~~~~~~~~~
monochrome.cpp:54:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |   while(t<vb.size()&&vb[t]<vw[i]) t++;
      |         ~^~~~~~~~~~
monochrome.cpp:55:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   55 |   while(s<vb.size()&&vb[s]<vw[i]-n) s++;
      |         ~^~~~~~~~~~
monochrome.cpp:56:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |   while(r<vb.size()&&vb[r]<vw[i]-2*n) r++;
      |         ~^~~~~~~~~~
monochrome.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d",&n);
      |  ~~~~~^~~~~~~~~
monochrome.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |  scanf("%s",&str);
      |  ~~~~~^~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 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 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 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 256 KB Output is correct
2 Correct 0 ms 256 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 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 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 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 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 0 ms 384 KB Output is correct
25 Correct 0 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 0 ms 384 KB Output is correct
32 Correct 1 ms 512 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 0 ms 256 KB Output is correct
2 Correct 0 ms 256 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 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 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 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 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 0 ms 384 KB Output is correct
25 Correct 0 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 0 ms 384 KB Output is correct
32 Correct 1 ms 512 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 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 384 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 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 0 ms 256 KB Output is correct
2 Correct 0 ms 256 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 256 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 384 KB Output is correct
10 Correct 0 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 384 KB Output is correct
14 Correct 0 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 0 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 0 ms 384 KB Output is correct
20 Correct 0 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 0 ms 384 KB Output is correct
25 Correct 0 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 0 ms 384 KB Output is correct
32 Correct 1 ms 512 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 1 ms 384 KB Output is correct
35 Correct 1 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 384 KB Output is correct
43 Correct 1 ms 384 KB Output is correct
44 Correct 1 ms 384 KB Output is correct
45 Correct 1 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 42 ms 4708 KB Output is correct
54 Correct 42 ms 4808 KB Output is correct
55 Correct 39 ms 4572 KB Output is correct
56 Correct 39 ms 4628 KB Output is correct
57 Correct 29 ms 4584 KB Output is correct
58 Correct 31 ms 4716 KB Output is correct
59 Correct 29 ms 4704 KB Output is correct
60 Correct 29 ms 4620 KB Output is correct
61 Correct 29 ms 4624 KB Output is correct
62 Correct 30 ms 4620 KB Output is correct
63 Correct 32 ms 4704 KB Output is correct
64 Correct 27 ms 4592 KB Output is correct
65 Correct 29 ms 4368 KB Output is correct
66 Correct 30 ms 4592 KB Output is correct
67 Correct 30 ms 4584 KB Output is correct
68 Correct 28 ms 4336 KB Output is correct
69 Correct 29 ms 4712 KB Output is correct
70 Correct 27 ms 4332 KB Output is correct
71 Correct 27 ms 4720 KB Output is correct
72 Correct 27 ms 4720 KB Output is correct
73 Correct 27 ms 4840 KB Output is correct