답안 #893877

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
893877	2023-12-27T15:36:07 Z	Darren0724	Monochrome Points (JOI20_monochrome)	C++17	100 / 100	1228 ms	6236 KB

monochrome

#pragma GCC optimize("Ofast","O3","unroll-loops")
#pragma GCC target("avx2")
#include <bits/stdc++.h>
using namespace std;
#define ll long long 
#define LCBorz ios_base::sync_with_stdio(false); cin.tie(0);
#define all(x) x.begin(), x.end()
#define endl '\n'
#define x first
#define y second
const int N=400005;
const int INF=1e18;
const int mod=924844033;
struct BIT{
    vector<int> v=vector<int>(N);
    void add(int p,int t){
        for(int i=p;i<N;i+=i&(-i)){
            v[i]+=t;
        }
    }
    ll ask(int p){
        ll ans=0;
        for(int i=p;i>0;i-=i&(-i)){
            ans+=v[i];
        }
        return ans;
    }
};
int32_t main() {
    LCBorz;
    int n;cin>>n;
    string s;cin>>s;
    vector<int> a,b;
    for(int i=0;i<n<<1;i++){
        if(s[i]=='W'){
            a.push_back(i+1);
        }
        else{
            b.push_back(i+1);
        }
    }    
    auto solve=[&](int k)->ll {
        vector<pair<int,int>> v(n);
        BIT bit;
        for(int i=0;i<n;i++){
            v[i]=make_pair(a[i],b[(i+k)%n]);
            if(v[i].x>v[i].y){
                swap(v[i].x,v[i].y);
            }
            bit.add(v[i].x,1);
            bit.add(v[i].y,-1);
        }
        ll ans=0;
        sort(all(v));
        for(int i=0;i<n;i++){
            ans+=bit.ask(v[i].y-1)-bit.ask(v[i].x);
            bit.add(v[i].x,-1);
            bit.add(v[i].y,2);
        }
        return ans;
    };
    ll ans=0;
    int l=0,r=n+1;
    while(r-l>4){
        int m=(l+r)>>1;
        if(solve(m)>solve(m+1)){
            r=m+1;
        }
        else{
            l=m-1;
        }
    }
    for(int i=l;i<=r;i++){
        ans=max(ans,solve(i));
    }
    cout<<ans/2<<endl;

    return 0;
}

Compilation message

monochrome.cpp:12:15: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   12 | const int INF=1e18;
      |               ^~~~

Subtask #1
4.0 / 4.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	1880 KB	Output is correct
2	Correct	1 ms	1884 KB	Output is correct
3	Correct	1 ms	1884 KB	Output is correct
4	Correct	1 ms	1884 KB	Output is correct
5	Correct	1 ms	1884 KB	Output is correct
6	Correct	2 ms	1884 KB	Output is correct
7	Correct	2 ms	1884 KB	Output is correct
8	Correct	1 ms	2136 KB	Output is correct
9	Correct	1 ms	1884 KB	Output is correct
10	Correct	2 ms	1884 KB	Output is correct
11	Correct	2 ms	1884 KB	Output is correct
12	Correct	1 ms	1884 KB	Output is correct
13	Correct	1 ms	1884 KB	Output is correct

Subtask #2
21.0 / 21.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	1880 KB	Output is correct
2	Correct	1 ms	1884 KB	Output is correct
3	Correct	1 ms	1884 KB	Output is correct
4	Correct	1 ms	1884 KB	Output is correct
5	Correct	1 ms	1884 KB	Output is correct
6	Correct	2 ms	1884 KB	Output is correct
7	Correct	2 ms	1884 KB	Output is correct
8	Correct	1 ms	2136 KB	Output is correct
9	Correct	1 ms	1884 KB	Output is correct
10	Correct	2 ms	1884 KB	Output is correct
11	Correct	2 ms	1884 KB	Output is correct
12	Correct	1 ms	1884 KB	Output is correct
13	Correct	1 ms	1884 KB	Output is correct
14	Correct	3 ms	1884 KB	Output is correct
15	Correct	3 ms	1884 KB	Output is correct
16	Correct	2 ms	2136 KB	Output is correct
17	Correct	3 ms	1884 KB	Output is correct
18	Correct	2 ms	1884 KB	Output is correct
19	Correct	3 ms	1880 KB	Output is correct
20	Correct	3 ms	2044 KB	Output is correct
21	Correct	3 ms	2036 KB	Output is correct
22	Correct	3 ms	1888 KB	Output is correct
23	Correct	2 ms	1884 KB	Output is correct
24	Correct	2 ms	1884 KB	Output is correct
25	Correct	2 ms	1884 KB	Output is correct
26	Correct	3 ms	1880 KB	Output is correct
27	Correct	2 ms	1880 KB	Output is correct
28	Correct	3 ms	2136 KB	Output is correct
29	Correct	2 ms	2036 KB	Output is correct
30	Correct	2 ms	1880 KB	Output is correct
31	Correct	3 ms	1884 KB	Output is correct
32	Correct	2 ms	1880 KB	Output is correct
33	Correct	2 ms	1884 KB	Output is correct

Subtask #3
10.0 / 10.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	1880 KB	Output is correct
2	Correct	1 ms	1884 KB	Output is correct
3	Correct	1 ms	1884 KB	Output is correct
4	Correct	1 ms	1884 KB	Output is correct
5	Correct	1 ms	1884 KB	Output is correct
6	Correct	2 ms	1884 KB	Output is correct
7	Correct	2 ms	1884 KB	Output is correct
8	Correct	1 ms	2136 KB	Output is correct
9	Correct	1 ms	1884 KB	Output is correct
10	Correct	2 ms	1884 KB	Output is correct
11	Correct	2 ms	1884 KB	Output is correct
12	Correct	1 ms	1884 KB	Output is correct
13	Correct	1 ms	1884 KB	Output is correct
14	Correct	3 ms	1884 KB	Output is correct
15	Correct	3 ms	1884 KB	Output is correct
16	Correct	2 ms	2136 KB	Output is correct
17	Correct	3 ms	1884 KB	Output is correct
18	Correct	2 ms	1884 KB	Output is correct
19	Correct	3 ms	1880 KB	Output is correct
20	Correct	3 ms	2044 KB	Output is correct
21	Correct	3 ms	2036 KB	Output is correct
22	Correct	3 ms	1888 KB	Output is correct
23	Correct	2 ms	1884 KB	Output is correct
24	Correct	2 ms	1884 KB	Output is correct
25	Correct	2 ms	1884 KB	Output is correct
26	Correct	3 ms	1880 KB	Output is correct
27	Correct	2 ms	1880 KB	Output is correct
28	Correct	3 ms	2136 KB	Output is correct
29	Correct	2 ms	2036 KB	Output is correct
30	Correct	2 ms	1880 KB	Output is correct
31	Correct	3 ms	1884 KB	Output is correct
32	Correct	2 ms	1880 KB	Output is correct
33	Correct	2 ms	1884 KB	Output is correct
34	Correct	8 ms	2084 KB	Output is correct
35	Correct	8 ms	1884 KB	Output is correct
36	Correct	8 ms	1884 KB	Output is correct
37	Correct	8 ms	2080 KB	Output is correct
38	Correct	7 ms	1884 KB	Output is correct
39	Correct	8 ms	2392 KB	Output is correct
40	Correct	8 ms	2076 KB	Output is correct
41	Correct	7 ms	1880 KB	Output is correct
42	Correct	8 ms	1956 KB	Output is correct
43	Correct	8 ms	1884 KB	Output is correct
44	Correct	8 ms	2080 KB	Output is correct
45	Correct	8 ms	1884 KB	Output is correct
46	Correct	9 ms	1884 KB	Output is correct
47	Correct	8 ms	1884 KB	Output is correct
48	Correct	8 ms	1884 KB	Output is correct
49	Correct	7 ms	1884 KB	Output is correct
50	Correct	8 ms	1884 KB	Output is correct
51	Correct	7 ms	1884 KB	Output is correct
52	Correct	8 ms	2088 KB	Output is correct

Subtask #4
65.0 / 65.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	1880 KB	Output is correct
2	Correct	1 ms	1884 KB	Output is correct
3	Correct	1 ms	1884 KB	Output is correct
4	Correct	1 ms	1884 KB	Output is correct
5	Correct	1 ms	1884 KB	Output is correct
6	Correct	2 ms	1884 KB	Output is correct
7	Correct	2 ms	1884 KB	Output is correct
8	Correct	1 ms	2136 KB	Output is correct
9	Correct	1 ms	1884 KB	Output is correct
10	Correct	2 ms	1884 KB	Output is correct
11	Correct	2 ms	1884 KB	Output is correct
12	Correct	1 ms	1884 KB	Output is correct
13	Correct	1 ms	1884 KB	Output is correct
14	Correct	3 ms	1884 KB	Output is correct
15	Correct	3 ms	1884 KB	Output is correct
16	Correct	2 ms	2136 KB	Output is correct
17	Correct	3 ms	1884 KB	Output is correct
18	Correct	2 ms	1884 KB	Output is correct
19	Correct	3 ms	1880 KB	Output is correct
20	Correct	3 ms	2044 KB	Output is correct
21	Correct	3 ms	2036 KB	Output is correct
22	Correct	3 ms	1888 KB	Output is correct
23	Correct	2 ms	1884 KB	Output is correct
24	Correct	2 ms	1884 KB	Output is correct
25	Correct	2 ms	1884 KB	Output is correct
26	Correct	3 ms	1880 KB	Output is correct
27	Correct	2 ms	1880 KB	Output is correct
28	Correct	3 ms	2136 KB	Output is correct
29	Correct	2 ms	2036 KB	Output is correct
30	Correct	2 ms	1880 KB	Output is correct
31	Correct	3 ms	1884 KB	Output is correct
32	Correct	2 ms	1880 KB	Output is correct
33	Correct	2 ms	1884 KB	Output is correct
34	Correct	8 ms	2084 KB	Output is correct
35	Correct	8 ms	1884 KB	Output is correct
36	Correct	8 ms	1884 KB	Output is correct
37	Correct	8 ms	2080 KB	Output is correct
38	Correct	7 ms	1884 KB	Output is correct
39	Correct	8 ms	2392 KB	Output is correct
40	Correct	8 ms	2076 KB	Output is correct
41	Correct	7 ms	1880 KB	Output is correct
42	Correct	8 ms	1956 KB	Output is correct
43	Correct	8 ms	1884 KB	Output is correct
44	Correct	8 ms	2080 KB	Output is correct
45	Correct	8 ms	1884 KB	Output is correct
46	Correct	9 ms	1884 KB	Output is correct
47	Correct	8 ms	1884 KB	Output is correct
48	Correct	8 ms	1884 KB	Output is correct
49	Correct	7 ms	1884 KB	Output is correct
50	Correct	8 ms	1884 KB	Output is correct
51	Correct	7 ms	1884 KB	Output is correct
52	Correct	8 ms	2088 KB	Output is correct
53	Correct	1189 ms	5860 KB	Output is correct
54	Correct	1171 ms	6084 KB	Output is correct
55	Correct	1190 ms	6136 KB	Output is correct
56	Correct	1150 ms	6108 KB	Output is correct
57	Correct	1022 ms	6020 KB	Output is correct
58	Correct	933 ms	6052 KB	Output is correct
59	Correct	1032 ms	5900 KB	Output is correct
60	Correct	1095 ms	6220 KB	Output is correct
61	Correct	1127 ms	6108 KB	Output is correct
62	Correct	1073 ms	6116 KB	Output is correct
63	Correct	1182 ms	6116 KB	Output is correct
64	Correct	948 ms	5988 KB	Output is correct
65	Correct	1045 ms	6056 KB	Output is correct
66	Correct	1060 ms	5820 KB	Output is correct
67	Correct	1090 ms	5888 KB	Output is correct
68	Correct	832 ms	5736 KB	Output is correct
69	Correct	970 ms	6156 KB	Output is correct
70	Correct	932 ms	5584 KB	Output is correct
71	Correct	1147 ms	6076 KB	Output is correct
72	Correct	845 ms	6064 KB	Output is correct
73	Correct	1228 ms	6236 KB	Output is correct

답안 #893877

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