oj.uz

Submission #893876

# Submission time Handle Problem Language Result Execution time Memory
893876 2023-12-27T15:33:31 Z Darren0724 Monochrome Points (JOI20_monochrome) C++17
35 / 100
 2000 ms 11136 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=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;
        }
    }
    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;
    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;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 2 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 2 ms 3420 KB Output is correct
6 Correct 2 ms 3420 KB Output is correct
7 Correct 2 ms 3420 KB Output is correct
8 Correct 3 ms 3420 KB Output is correct
9 Correct 3 ms 3416 KB Output is correct
10 Correct 2 ms 3420 KB Output is correct
11 Correct 2 ms 3420 KB Output is correct
12 Correct 3 ms 3528 KB Output is correct
13 Correct 3 ms 3420 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 2 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 2 ms 3420 KB Output is correct
6 Correct 2 ms 3420 KB Output is correct
7 Correct 2 ms 3420 KB Output is correct
8 Correct 3 ms 3420 KB Output is correct
9 Correct 3 ms 3416 KB Output is correct
10 Correct 2 ms 3420 KB Output is correct
11 Correct 2 ms 3420 KB Output is correct
12 Correct 3 ms 3528 KB Output is correct
13 Correct 3 ms 3420 KB Output is correct
14 Correct 4 ms 3620 KB Output is correct
15 Correct 4 ms 3620 KB Output is correct
16 Correct 5 ms 3620 KB Output is correct
17 Correct 4 ms 3620 KB Output is correct
18 Correct 4 ms 3420 KB Output is correct
19 Correct 3 ms 3616 KB Output is correct
20 Correct 5 ms 3620 KB Output is correct
21 Correct 4 ms 3620 KB Output is correct
22 Correct 4 ms 3616 KB Output is correct
23 Correct 4 ms 3420 KB Output is correct
24 Correct 4 ms 3616 KB Output is correct
25 Correct 4 ms 3524 KB Output is correct
26 Correct 4 ms 3620 KB Output is correct
27 Correct 4 ms 3524 KB Output is correct
28 Correct 4 ms 3620 KB Output is correct
29 Correct 4 ms 3620 KB Output is correct
30 Correct 4 ms 3528 KB Output is correct
31 Correct 5 ms 3616 KB Output is correct
32 Correct 4 ms 3420 KB Output is correct
33 Correct 3 ms 3620 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 2 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 2 ms 3420 KB Output is correct
6 Correct 2 ms 3420 KB Output is correct
7 Correct 2 ms 3420 KB Output is correct
8 Correct 3 ms 3420 KB Output is correct
9 Correct 3 ms 3416 KB Output is correct
10 Correct 2 ms 3420 KB Output is correct
11 Correct 2 ms 3420 KB Output is correct
12 Correct 3 ms 3528 KB Output is correct
13 Correct 3 ms 3420 KB Output is correct
14 Correct 4 ms 3620 KB Output is correct
15 Correct 4 ms 3620 KB Output is correct
16 Correct 5 ms 3620 KB Output is correct
17 Correct 4 ms 3620 KB Output is correct
18 Correct 4 ms 3420 KB Output is correct
19 Correct 3 ms 3616 KB Output is correct
20 Correct 5 ms 3620 KB Output is correct
21 Correct 4 ms 3620 KB Output is correct
22 Correct 4 ms 3616 KB Output is correct
23 Correct 4 ms 3420 KB Output is correct
24 Correct 4 ms 3616 KB Output is correct
25 Correct 4 ms 3524 KB Output is correct
26 Correct 4 ms 3620 KB Output is correct
27 Correct 4 ms 3524 KB Output is correct
28 Correct 4 ms 3620 KB Output is correct
29 Correct 4 ms 3620 KB Output is correct
30 Correct 4 ms 3528 KB Output is correct
31 Correct 5 ms 3616 KB Output is correct
32 Correct 4 ms 3420 KB Output is correct
33 Correct 3 ms 3620 KB Output is correct
34 Correct 12 ms 3676 KB Output is correct
35 Correct 11 ms 3692 KB Output is correct
36 Correct 11 ms 3676 KB Output is correct
37 Correct 12 ms 3696 KB Output is correct
38 Correct 10 ms 3676 KB Output is correct
39 Correct 12 ms 3688 KB Output is correct
40 Correct 11 ms 3672 KB Output is correct
41 Correct 10 ms 3672 KB Output is correct
42 Correct 13 ms 3676 KB Output is correct
43 Correct 12 ms 3676 KB Output is correct
44 Correct 12 ms 3676 KB Output is correct
45 Correct 12 ms 3676 KB Output is correct
46 Correct 12 ms 3676 KB Output is correct
47 Correct 11 ms 3676 KB Output is correct
48 Correct 10 ms 3676 KB Output is correct
49 Correct 11 ms 3676 KB Output is correct
50 Correct 12 ms 3676 KB Output is correct
51 Correct 12 ms 3676 KB Output is correct
52 Correct 11 ms 3676 KB Output is correct

Subtask #4
0.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3420 KB Output is correct
2 Correct 2 ms 3420 KB Output is correct
3 Correct 2 ms 3420 KB Output is correct
4 Correct 2 ms 3420 KB Output is correct
5 Correct 2 ms 3420 KB Output is correct
6 Correct 2 ms 3420 KB Output is correct
7 Correct 2 ms 3420 KB Output is correct
8 Correct 3 ms 3420 KB Output is correct
9 Correct 3 ms 3416 KB Output is correct
10 Correct 2 ms 3420 KB Output is correct
11 Correct 2 ms 3420 KB Output is correct
12 Correct 3 ms 3528 KB Output is correct
13 Correct 3 ms 3420 KB Output is correct
14 Correct 4 ms 3620 KB Output is correct
15 Correct 4 ms 3620 KB Output is correct
16 Correct 5 ms 3620 KB Output is correct
17 Correct 4 ms 3620 KB Output is correct
18 Correct 4 ms 3420 KB Output is correct
19 Correct 3 ms 3616 KB Output is correct
20 Correct 5 ms 3620 KB Output is correct
21 Correct 4 ms 3620 KB Output is correct
22 Correct 4 ms 3616 KB Output is correct
23 Correct 4 ms 3420 KB Output is correct
24 Correct 4 ms 3616 KB Output is correct
25 Correct 4 ms 3524 KB Output is correct
26 Correct 4 ms 3620 KB Output is correct
27 Correct 4 ms 3524 KB Output is correct
28 Correct 4 ms 3620 KB Output is correct
29 Correct 4 ms 3620 KB Output is correct
30 Correct 4 ms 3528 KB Output is correct
31 Correct 5 ms 3616 KB Output is correct
32 Correct 4 ms 3420 KB Output is correct
33 Correct 3 ms 3620 KB Output is correct
34 Correct 12 ms 3676 KB Output is correct
35 Correct 11 ms 3692 KB Output is correct
36 Correct 11 ms 3676 KB Output is correct
37 Correct 12 ms 3696 KB Output is correct
38 Correct 10 ms 3676 KB Output is correct
39 Correct 12 ms 3688 KB Output is correct
40 Correct 11 ms 3672 KB Output is correct
41 Correct 10 ms 3672 KB Output is correct
42 Correct 13 ms 3676 KB Output is correct
43 Correct 12 ms 3676 KB Output is correct
44 Correct 12 ms 3676 KB Output is correct
45 Correct 12 ms 3676 KB Output is correct
46 Correct 12 ms 3676 KB Output is correct
47 Correct 11 ms 3676 KB Output is correct
48 Correct 10 ms 3676 KB Output is correct
49 Correct 11 ms 3676 KB Output is correct
50 Correct 12 ms 3676 KB Output is correct
51 Correct 12 ms 3676 KB Output is correct
52 Correct 11 ms 3676 KB Output is correct
53 Execution timed out 2053 ms 11136 KB Time limit exceeded
54 Halted 0 ms 0 KB -