답안 #516574

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
516574	2022-01-21T13:41:08 Z	leinad2	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	2000 ms	12248 KB

monochrome

#include<bits/stdc++.h>
using namespace std;
int n, i, j, k, a, b;
long long ans=0;
char S[400010];
vector<int>A, B;
int seg[1600010];
void init(){for(int i=0;i<8*n;i++)seg[i]=0;}
void update(int id, int s, int e, int x, int v)
{
    if(e<x||x<s)return;
    if(s==e)
    {
        seg[id]+=v;
        return;
    }
    int m=s+e>>1;
    update(id*2, s, m, x, v);update(id*2+1, m+1, e, x, v);
    seg[id]=seg[id*2]+seg[id*2+1];
}
int get(int id, int s, int e, int l, int r)
{
    if(e<l||r<s)return 0;
    if(l<=s&&e<=r)return seg[id];
    int m=s+e>>1;
    return get(id*2, s, m, l, r)+get(id*2+1, m+1, e, l, r);
}
long long f(int i)
{
    init();
    vector<pair<int, int> >V;
    for(int j=i;j<n;j++)V.push_back({A[j-i], B[j]});
    for(int j=0;j<i;j++)V.push_back({A[j+n-i], B[j]});
    for(auto &p:V)if(p.first>p.second)swap(p.first, p.second);
    sort(V.begin(), V.end());
    long long res=0;
    for(auto p:V)
    {
        int a=p.second;
        update(1, 1, 2*n, a, 1);
        res+=get(1, 1, 2*n, p.first, a-1);
    }
    ans=max(ans, res);
    return res;
}
main()
{
    scanf("%d", &n);
    scanf("%s", &S);
    for(i=0;i<2*n;i++)
    {
        if(S[i]=='B')A.push_back(i+1);
        else B.push_back(i+1);
    }
    if(n<200)for(i=0;i<n;i++)f(i);
    else
    {
        int a=0, b=n-1;
        while(a+3<=b)
        {
            int m1=(a+a+b)/3, m2=(a+b+b)/3;
            if(f(m1)>f(m2))b=m2;
            else a=m1;
        }
        for(i=a;i<=b;i++)f(i);
        for(i=0;i<25;i++)f(i);
        for(i=n-25;i<n;i++)f(i);
    }
    cout<<ans;
}

Compilation message

monochrome.cpp: In function 'void update(int, int, int, int, int)':
monochrome.cpp:17:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |     int m=s+e>>1;
      |           ~^~
monochrome.cpp: In function 'int get(int, int, int, int, int)':
monochrome.cpp:25:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   25 |     int m=s+e>>1;
      |           ~^~
monochrome.cpp: At global scope:
monochrome.cpp:46:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   46 | main()
      | ^~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:49:13: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[400010]' [-Wformat=]
   49 |     scanf("%s", &S);
      |            ~^   ~~
      |             |   |
      |             |   char (*)[400010]
      |             char*
monochrome.cpp:48:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
monochrome.cpp:49:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |     scanf("%s", &S);
      |     ~~~~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	6 ms	332 KB	Output is correct
17	Correct	6 ms	204 KB	Output is correct
18	Correct	5 ms	332 KB	Output is correct
19	Correct	5 ms	204 KB	Output is correct
20	Correct	5 ms	332 KB	Output is correct
21	Correct	5 ms	332 KB	Output is correct
22	Correct	5 ms	328 KB	Output is correct
23	Correct	9 ms	312 KB	Output is correct
24	Correct	5 ms	328 KB	Output is correct
25	Correct	5 ms	204 KB	Output is correct
26	Correct	5 ms	204 KB	Output is correct
27	Correct	5 ms	204 KB	Output is correct
28	Correct	6 ms	300 KB	Output is correct
29	Correct	4 ms	204 KB	Output is correct
30	Correct	5 ms	204 KB	Output is correct
31	Correct	6 ms	204 KB	Output is correct
32	Correct	8 ms	204 KB	Output is correct
33	Correct	6 ms	204 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	6 ms	332 KB	Output is correct
17	Correct	6 ms	204 KB	Output is correct
18	Correct	5 ms	332 KB	Output is correct
19	Correct	5 ms	204 KB	Output is correct
20	Correct	5 ms	332 KB	Output is correct
21	Correct	5 ms	332 KB	Output is correct
22	Correct	5 ms	328 KB	Output is correct
23	Correct	9 ms	312 KB	Output is correct
24	Correct	5 ms	328 KB	Output is correct
25	Correct	5 ms	204 KB	Output is correct
26	Correct	5 ms	204 KB	Output is correct
27	Correct	5 ms	204 KB	Output is correct
28	Correct	6 ms	300 KB	Output is correct
29	Correct	4 ms	204 KB	Output is correct
30	Correct	5 ms	204 KB	Output is correct
31	Correct	6 ms	204 KB	Output is correct
32	Correct	8 ms	204 KB	Output is correct
33	Correct	6 ms	204 KB	Output is correct
34	Correct	50 ms	412 KB	Output is correct
35	Correct	52 ms	420 KB	Output is correct
36	Correct	53 ms	400 KB	Output is correct
37	Correct	57 ms	332 KB	Output is correct
38	Correct	45 ms	332 KB	Output is correct
39	Correct	49 ms	396 KB	Output is correct
40	Correct	42 ms	332 KB	Output is correct
41	Correct	43 ms	396 KB	Output is correct
42	Correct	57 ms	404 KB	Output is correct
43	Correct	58 ms	332 KB	Output is correct
44	Correct	49 ms	452 KB	Output is correct
45	Correct	51 ms	396 KB	Output is correct
46	Correct	51 ms	396 KB	Output is correct
47	Correct	52 ms	332 KB	Output is correct
48	Correct	50 ms	332 KB	Output is correct
49	Correct	45 ms	332 KB	Output is correct
50	Correct	49 ms	392 KB	Output is correct
51	Correct	50 ms	332 KB	Output is correct
52	Correct	50 ms	408 KB	Output is correct

Subtask #4
0.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	204 KB	Output is correct
2	Correct	0 ms	204 KB	Output is correct
3	Correct	0 ms	204 KB	Output is correct
4	Correct	1 ms	204 KB	Output is correct
5	Correct	0 ms	204 KB	Output is correct
6	Correct	0 ms	204 KB	Output is correct
7	Correct	0 ms	204 KB	Output is correct
8	Correct	0 ms	204 KB	Output is correct
9	Correct	1 ms	204 KB	Output is correct
10	Correct	0 ms	204 KB	Output is correct
11	Correct	1 ms	204 KB	Output is correct
12	Correct	0 ms	204 KB	Output is correct
13	Correct	0 ms	204 KB	Output is correct
14	Correct	7 ms	332 KB	Output is correct
15	Correct	7 ms	332 KB	Output is correct
16	Correct	6 ms	332 KB	Output is correct
17	Correct	6 ms	204 KB	Output is correct
18	Correct	5 ms	332 KB	Output is correct
19	Correct	5 ms	204 KB	Output is correct
20	Correct	5 ms	332 KB	Output is correct
21	Correct	5 ms	332 KB	Output is correct
22	Correct	5 ms	328 KB	Output is correct
23	Correct	9 ms	312 KB	Output is correct
24	Correct	5 ms	328 KB	Output is correct
25	Correct	5 ms	204 KB	Output is correct
26	Correct	5 ms	204 KB	Output is correct
27	Correct	5 ms	204 KB	Output is correct
28	Correct	6 ms	300 KB	Output is correct
29	Correct	4 ms	204 KB	Output is correct
30	Correct	5 ms	204 KB	Output is correct
31	Correct	6 ms	204 KB	Output is correct
32	Correct	8 ms	204 KB	Output is correct
33	Correct	6 ms	204 KB	Output is correct
34	Correct	50 ms	412 KB	Output is correct
35	Correct	52 ms	420 KB	Output is correct
36	Correct	53 ms	400 KB	Output is correct
37	Correct	57 ms	332 KB	Output is correct
38	Correct	45 ms	332 KB	Output is correct
39	Correct	49 ms	396 KB	Output is correct
40	Correct	42 ms	332 KB	Output is correct
41	Correct	43 ms	396 KB	Output is correct
42	Correct	57 ms	404 KB	Output is correct
43	Correct	58 ms	332 KB	Output is correct
44	Correct	49 ms	452 KB	Output is correct
45	Correct	51 ms	396 KB	Output is correct
46	Correct	51 ms	396 KB	Output is correct
47	Correct	52 ms	332 KB	Output is correct
48	Correct	50 ms	332 KB	Output is correct
49	Correct	45 ms	332 KB	Output is correct
50	Correct	49 ms	392 KB	Output is correct
51	Correct	50 ms	332 KB	Output is correct
52	Correct	50 ms	408 KB	Output is correct
53	Execution timed out	2052 ms	12248 KB	Time limit exceeded
54	Halted	0 ms	0 KB	-

답안 #516574

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 0.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
0.0 / 65.0