답안 #516577

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
516577	2022-01-21T13:47:48 Z	leinad2	Monochrome Points (JOI20_monochrome)	C++17	100 / 100	1512 ms	8056 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 tree[400010];
void init(){for(int i=1;i<=2*n;i++)tree[i]=0;}
void update(int pos, int v){while(pos<=2*n)tree[pos]+=v,pos+=(pos&-pos);}
int get(int pos){int res=0;while(pos)res+=tree[pos],pos-=(pos&-pos);return res;}
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(a, 1);
        res+=get(a-1)-get(p.first);
    }
    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);
    }
    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);
    cout<<ans;
}

Compilation message

monochrome.cpp:29:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   29 | main()
      | ^~~~
monochrome.cpp: In function 'int main()':
monochrome.cpp:32:13: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[400010]' [-Wformat=]
   32 |     scanf("%s", &S);
      |            ~^   ~~
      |             |   |
      |             |   char (*)[400010]
      |             char*
monochrome.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
monochrome.cpp:32:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 |     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	0 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	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	0 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	0 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	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	0 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	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	204 KB	Output is correct
30	Correct	1 ms	204 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	1 ms	204 KB	Output is correct
33	Correct	1 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	0 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	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	0 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	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	204 KB	Output is correct
30	Correct	1 ms	204 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	1 ms	204 KB	Output is correct
33	Correct	1 ms	204 KB	Output is correct
34	Correct	5 ms	332 KB	Output is correct
35	Correct	5 ms	372 KB	Output is correct
36	Correct	6 ms	332 KB	Output is correct
37	Correct	6 ms	332 KB	Output is correct
38	Correct	4 ms	372 KB	Output is correct
39	Correct	4 ms	332 KB	Output is correct
40	Correct	4 ms	332 KB	Output is correct
41	Correct	4 ms	372 KB	Output is correct
42	Correct	5 ms	332 KB	Output is correct
43	Correct	4 ms	332 KB	Output is correct
44	Correct	5 ms	332 KB	Output is correct
45	Correct	4 ms	332 KB	Output is correct
46	Correct	4 ms	372 KB	Output is correct
47	Correct	5 ms	376 KB	Output is correct
48	Correct	5 ms	372 KB	Output is correct
49	Correct	4 ms	368 KB	Output is correct
50	Correct	4 ms	332 KB	Output is correct
51	Correct	5 ms	332 KB	Output is correct
52	Correct	6 ms	332 KB	Output is correct

Subtask #4
65.0 / 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	0 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	0 ms	204 KB	Output is correct
10	Correct	1 ms	204 KB	Output is correct
11	Correct	0 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	1 ms	204 KB	Output is correct
15	Correct	1 ms	204 KB	Output is correct
16	Correct	1 ms	204 KB	Output is correct
17	Correct	1 ms	204 KB	Output is correct
18	Correct	1 ms	204 KB	Output is correct
19	Correct	1 ms	204 KB	Output is correct
20	Correct	1 ms	204 KB	Output is correct
21	Correct	1 ms	204 KB	Output is correct
22	Correct	1 ms	204 KB	Output is correct
23	Correct	1 ms	204 KB	Output is correct
24	Correct	1 ms	204 KB	Output is correct
25	Correct	1 ms	204 KB	Output is correct
26	Correct	1 ms	204 KB	Output is correct
27	Correct	1 ms	204 KB	Output is correct
28	Correct	1 ms	204 KB	Output is correct
29	Correct	1 ms	204 KB	Output is correct
30	Correct	1 ms	204 KB	Output is correct
31	Correct	1 ms	204 KB	Output is correct
32	Correct	1 ms	204 KB	Output is correct
33	Correct	1 ms	204 KB	Output is correct
34	Correct	5 ms	332 KB	Output is correct
35	Correct	5 ms	372 KB	Output is correct
36	Correct	6 ms	332 KB	Output is correct
37	Correct	6 ms	332 KB	Output is correct
38	Correct	4 ms	372 KB	Output is correct
39	Correct	4 ms	332 KB	Output is correct
40	Correct	4 ms	332 KB	Output is correct
41	Correct	4 ms	372 KB	Output is correct
42	Correct	5 ms	332 KB	Output is correct
43	Correct	4 ms	332 KB	Output is correct
44	Correct	5 ms	332 KB	Output is correct
45	Correct	4 ms	332 KB	Output is correct
46	Correct	4 ms	372 KB	Output is correct
47	Correct	5 ms	376 KB	Output is correct
48	Correct	5 ms	372 KB	Output is correct
49	Correct	4 ms	368 KB	Output is correct
50	Correct	4 ms	332 KB	Output is correct
51	Correct	5 ms	332 KB	Output is correct
52	Correct	6 ms	332 KB	Output is correct
53	Correct	1459 ms	7640 KB	Output is correct
54	Correct	1390 ms	7928 KB	Output is correct
55	Correct	1319 ms	7708 KB	Output is correct
56	Correct	1257 ms	7648 KB	Output is correct
57	Correct	901 ms	7812 KB	Output is correct
58	Correct	1028 ms	7824 KB	Output is correct
59	Correct	1203 ms	7600 KB	Output is correct
60	Correct	1071 ms	7660 KB	Output is correct
61	Correct	1328 ms	7732 KB	Output is correct
62	Correct	1164 ms	7816 KB	Output is correct
63	Correct	1308 ms	7692 KB	Output is correct
64	Correct	1080 ms	7648 KB	Output is correct
65	Correct	1317 ms	7480 KB	Output is correct
66	Correct	943 ms	7828 KB	Output is correct
67	Correct	916 ms	7576 KB	Output is correct
68	Correct	1148 ms	7404 KB	Output is correct
69	Correct	1079 ms	8056 KB	Output is correct
70	Correct	1110 ms	7448 KB	Output is correct
71	Correct	779 ms	7892 KB	Output is correct
72	Correct	1275 ms	7832 KB	Output is correct
73	Correct	1512 ms	7824 KB	Output is correct

답안 #516577

Compilation message

Subtask #1 4.0 / 4.0

Subtask #2 21.0 / 21.0

Subtask #3 10.0 / 10.0

Subtask #4 65.0 / 65.0

Subtask #1
4.0 / 4.0

Subtask #2
21.0 / 21.0

Subtask #3
10.0 / 10.0

Subtask #4
65.0 / 65.0