oj.uz

Submission #362275

# Submission time Handle Problem Language Result Execution time Memory
362275 2021-02-02T13:32:59 Z doowey Monochrome Points (JOI20_monochrome) C++14
100 / 100
 1814 ms 10952 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

#define fi first
#define se second
#define mp make_pair
#define fastIO ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);

const int N = (int)4e5 + 100;

int col[N];
int n, m;
vector<int> C[2];
int segt[N*2];

void upd(int id, int v){
    id += m;
    while(id > 0){
        segt[id] += v;
        id /= 2;
    }
}

int get(int l, int r){
    l += m;
    r += m;
    int cum = 0;
    while(l <= r){
        if(l % 2 == 1) cum += segt[l ++ ];
        if(r % 2 == 0) cum += segt[r -- ];
        l /= 2;
        r /= 2;
    }
    return cum;
}

ll f(int k){
    vector<pii> seg;
    for(int i = 0 ; i < n; i ++ ){
        seg.push_back(mp(C[0][i], C[1][(i + k) % n]));
    }
    for(auto &x : seg){
        if(x.fi > x.se) swap(x.fi, x.se);
    }
    for(int i = 0 ; i < m * 2; i ++ ){
        segt[i]=0;
    }
    sort(seg.begin(), seg.end());
    ll ff = 0;
    for(auto q : seg){
        ff += get(q.fi, q.se);
        upd(q.se, +1);
    }
    return ff;
}

int main(){
    fastIO;
    cin >> n;
    m = n * 2;
    char qf;
    for(int i = 0; i < m ; i ++ ){
        cin >> qf;
        if(qf == 'B'){
            col[i]=0;
        }
        else{
            col[i]=1;
        }
        C[col[i]].push_back(i);
    }
    ll high = f(0);
    int li = 1;
    int ri = n;
    int mid;
    while(li < ri){
        mid = (li + ri) / 2;
        if(f(mid) < f(mid + 1)){
            li = mid + 1;
        }
        else{
            ri = mid;
        }
    }
    high = max(high, f(li));
    cout << high << "\n";
    return 0;
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 384 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 8 ms 504 KB Output is correct
35 Correct 8 ms 492 KB Output is correct
36 Correct 8 ms 492 KB Output is correct
37 Correct 7 ms 492 KB Output is correct
38 Correct 6 ms 492 KB Output is correct
39 Correct 6 ms 492 KB Output is correct
40 Correct 6 ms 492 KB Output is correct
41 Correct 7 ms 492 KB Output is correct
42 Correct 8 ms 492 KB Output is correct
43 Correct 8 ms 492 KB Output is correct
44 Correct 7 ms 492 KB Output is correct
45 Correct 8 ms 492 KB Output is correct
46 Correct 7 ms 492 KB Output is correct
47 Correct 7 ms 492 KB Output is correct
48 Correct 6 ms 492 KB Output is correct
49 Correct 5 ms 492 KB Output is correct
50 Correct 5 ms 492 KB Output is correct
51 Correct 6 ms 492 KB Output is correct
52 Correct 7 ms 492 KB Output is correct

Subtask #4
65.0 / 65.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 0 ms 364 KB Output is correct
5 Correct 0 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 0 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 1 ms 364 KB Output is correct
22 Correct 1 ms 364 KB Output is correct
23 Correct 1 ms 364 KB Output is correct
24 Correct 1 ms 364 KB Output is correct
25 Correct 1 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 384 KB Output is correct
34 Correct 8 ms 504 KB Output is correct
35 Correct 8 ms 492 KB Output is correct
36 Correct 8 ms 492 KB Output is correct
37 Correct 7 ms 492 KB Output is correct
38 Correct 6 ms 492 KB Output is correct
39 Correct 6 ms 492 KB Output is correct
40 Correct 6 ms 492 KB Output is correct
41 Correct 7 ms 492 KB Output is correct
42 Correct 8 ms 492 KB Output is correct
43 Correct 8 ms 492 KB Output is correct
44 Correct 7 ms 492 KB Output is correct
45 Correct 8 ms 492 KB Output is correct
46 Correct 7 ms 492 KB Output is correct
47 Correct 7 ms 492 KB Output is correct
48 Correct 6 ms 492 KB Output is correct
49 Correct 5 ms 492 KB Output is correct
50 Correct 5 ms 492 KB Output is correct
51 Correct 6 ms 492 KB Output is correct
52 Correct 7 ms 492 KB Output is correct
53 Correct 1814 ms 10292 KB Output is correct
54 Correct 1750 ms 10756 KB Output is correct
55 Correct 1550 ms 10420 KB Output is correct
56 Correct 1699 ms 10524 KB Output is correct
57 Correct 1175 ms 10512 KB Output is correct
58 Correct 1274 ms 10736 KB Output is correct
59 Correct 1396 ms 10504 KB Output is correct
60 Correct 1235 ms 10672 KB Output is correct
61 Correct 1491 ms 10604 KB Output is correct
62 Correct 1460 ms 10740 KB Output is correct
63 Correct 1526 ms 10588 KB Output is correct
64 Correct 1236 ms 10388 KB Output is correct
65 Correct 1457 ms 10012 KB Output is correct
66 Correct 1171 ms 10264 KB Output is correct
67 Correct 1300 ms 10288 KB Output is correct
68 Correct 1434 ms 10260 KB Output is correct
69 Correct 1239 ms 10636 KB Output is correct
70 Correct 1187 ms 10216 KB Output is correct
71 Correct 999 ms 10928 KB Output is correct
72 Correct 1352 ms 10808 KB Output is correct
73 Correct 1556 ms 10952 KB Output is correct