oj.uz

Submission #893354

# Submission time Handle Problem Language Result Execution time Memory
893354 2023-12-27T03:09:36 Z Darren0724 Monochrome Points (JOI20_monochrome) C++17
35 / 100
 552 ms 17440 KB 
#include <bits/stdc++.h>
using namespace std;
#define LCBorz ios_base::sync_with_stdio(false); cin.tie(0);
#define int long long
#define all(x) x.begin(), x.end()
#define endl '\n'
#define x first
#define y second
const int N=200005;
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;
        }
    }
    int ask(int p){
        int 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)->int {
        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);
        }
        int 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;
    };
    int ans=0;
    for(int i=0;i<n;i++){
        ans=max(ans,solve(i)/2);
    }
    cout<<ans<<endl;

    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1880 KB Output is correct
2 Correct 1 ms 1884 KB Output is correct
3 Correct 1 ms 1996 KB Output is correct
4 Correct 2 ms 1880 KB Output is correct
5 Correct 1 ms 1884 KB Output is correct
6 Correct 2 ms 2012 KB Output is correct
7 Correct 1 ms 1884 KB Output is correct
8 Correct 1 ms 1884 KB Output is correct
9 Correct 2 ms 1884 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 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

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1880 KB Output is correct
2 Correct 1 ms 1884 KB Output is correct
3 Correct 1 ms 1996 KB Output is correct
4 Correct 2 ms 1880 KB Output is correct
5 Correct 1 ms 1884 KB Output is correct
6 Correct 2 ms 2012 KB Output is correct
7 Correct 1 ms 1884 KB Output is correct
8 Correct 1 ms 1884 KB Output is correct
9 Correct 2 ms 1884 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 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 20 ms 2060 KB Output is correct
15 Correct 20 ms 1884 KB Output is correct
16 Correct 19 ms 1880 KB Output is correct
17 Correct 19 ms 1880 KB Output is correct
18 Correct 16 ms 1884 KB Output is correct
19 Correct 19 ms 1884 KB Output is correct
20 Correct 17 ms 2056 KB Output is correct
21 Correct 16 ms 2060 KB Output is correct
22 Correct 16 ms 1884 KB Output is correct
23 Correct 10 ms 1884 KB Output is correct
24 Correct 16 ms 2052 KB Output is correct
25 Correct 15 ms 1884 KB Output is correct
26 Correct 16 ms 1884 KB Output is correct
27 Correct 17 ms 1884 KB Output is correct
28 Correct 23 ms 2116 KB Output is correct
29 Correct 15 ms 1884 KB Output is correct
30 Correct 16 ms 1884 KB Output is correct
31 Correct 19 ms 1884 KB Output is correct
32 Correct 18 ms 2052 KB Output is correct
33 Correct 20 ms 2064 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1880 KB Output is correct
2 Correct 1 ms 1884 KB Output is correct
3 Correct 1 ms 1996 KB Output is correct
4 Correct 2 ms 1880 KB Output is correct
5 Correct 1 ms 1884 KB Output is correct
6 Correct 2 ms 2012 KB Output is correct
7 Correct 1 ms 1884 KB Output is correct
8 Correct 1 ms 1884 KB Output is correct
9 Correct 2 ms 1884 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 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 20 ms 2060 KB Output is correct
15 Correct 20 ms 1884 KB Output is correct
16 Correct 19 ms 1880 KB Output is correct
17 Correct 19 ms 1880 KB Output is correct
18 Correct 16 ms 1884 KB Output is correct
19 Correct 19 ms 1884 KB Output is correct
20 Correct 17 ms 2056 KB Output is correct
21 Correct 16 ms 2060 KB Output is correct
22 Correct 16 ms 1884 KB Output is correct
23 Correct 10 ms 1884 KB Output is correct
24 Correct 16 ms 2052 KB Output is correct
25 Correct 15 ms 1884 KB Output is correct
26 Correct 16 ms 1884 KB Output is correct
27 Correct 17 ms 1884 KB Output is correct
28 Correct 23 ms 2116 KB Output is correct
29 Correct 15 ms 1884 KB Output is correct
30 Correct 16 ms 1884 KB Output is correct
31 Correct 19 ms 1884 KB Output is correct
32 Correct 18 ms 2052 KB Output is correct
33 Correct 20 ms 2064 KB Output is correct
34 Correct 525 ms 2340 KB Output is correct
35 Correct 524 ms 2108 KB Output is correct
36 Correct 503 ms 2344 KB Output is correct
37 Correct 479 ms 2344 KB Output is correct
38 Correct 448 ms 2112 KB Output is correct
39 Correct 482 ms 2088 KB Output is correct
40 Correct 428 ms 2108 KB Output is correct
41 Correct 395 ms 2108 KB Output is correct
42 Correct 515 ms 2340 KB Output is correct
43 Correct 481 ms 2108 KB Output is correct
44 Correct 452 ms 2108 KB Output is correct
45 Correct 518 ms 2112 KB Output is correct
46 Correct 552 ms 2108 KB Output is correct
47 Correct 503 ms 2140 KB Output is correct
48 Correct 474 ms 2108 KB Output is correct
49 Correct 418 ms 2108 KB Output is correct
50 Correct 535 ms 2108 KB Output is correct
51 Correct 485 ms 2084 KB Output is correct
52 Correct 502 ms 2112 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 1880 KB Output is correct
2 Correct 1 ms 1884 KB Output is correct
3 Correct 1 ms 1996 KB Output is correct
4 Correct 2 ms 1880 KB Output is correct
5 Correct 1 ms 1884 KB Output is correct
6 Correct 2 ms 2012 KB Output is correct
7 Correct 1 ms 1884 KB Output is correct
8 Correct 1 ms 1884 KB Output is correct
9 Correct 2 ms 1884 KB Output is correct
10 Correct 1 ms 1884 KB Output is correct
11 Correct 1 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 20 ms 2060 KB Output is correct
15 Correct 20 ms 1884 KB Output is correct
16 Correct 19 ms 1880 KB Output is correct
17 Correct 19 ms 1880 KB Output is correct
18 Correct 16 ms 1884 KB Output is correct
19 Correct 19 ms 1884 KB Output is correct
20 Correct 17 ms 2056 KB Output is correct
21 Correct 16 ms 2060 KB Output is correct
22 Correct 16 ms 1884 KB Output is correct
23 Correct 10 ms 1884 KB Output is correct
24 Correct 16 ms 2052 KB Output is correct
25 Correct 15 ms 1884 KB Output is correct
26 Correct 16 ms 1884 KB Output is correct
27 Correct 17 ms 1884 KB Output is correct
28 Correct 23 ms 2116 KB Output is correct
29 Correct 15 ms 1884 KB Output is correct
30 Correct 16 ms 1884 KB Output is correct
31 Correct 19 ms 1884 KB Output is correct
32 Correct 18 ms 2052 KB Output is correct
33 Correct 20 ms 2064 KB Output is correct
34 Correct 525 ms 2340 KB Output is correct
35 Correct 524 ms 2108 KB Output is correct
36 Correct 503 ms 2344 KB Output is correct
37 Correct 479 ms 2344 KB Output is correct
38 Correct 448 ms 2112 KB Output is correct
39 Correct 482 ms 2088 KB Output is correct
40 Correct 428 ms 2108 KB Output is correct
41 Correct 395 ms 2108 KB Output is correct
42 Correct 515 ms 2340 KB Output is correct
43 Correct 481 ms 2108 KB Output is correct
44 Correct 452 ms 2108 KB Output is correct
45 Correct 518 ms 2112 KB Output is correct
46 Correct 552 ms 2108 KB Output is correct
47 Correct 503 ms 2140 KB Output is correct
48 Correct 474 ms 2108 KB Output is correct
49 Correct 418 ms 2108 KB Output is correct
50 Correct 535 ms 2108 KB Output is correct
51 Correct 485 ms 2084 KB Output is correct
52 Correct 502 ms 2112 KB Output is correct
53 Runtime error 49 ms 17440 KB Execution killed with signal 11
54 Halted 0 ms 0 KB -