oj.uz

Submission #888000

# Submission time Handle Problem Language Result Execution time Memory
888000 2023-12-15T18:01:52 Z oviyan_gandhi JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 12 ms 8308 KB 
#include <bits/stdc++.h>
using namespace std;
#define int long long
const int INF = 1e17;
typedef vector<int> vi; typedef vector<vector<int>> vvi;

typedef pair<int, int> pii;

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n, k; cin >> n >> k;
    string s; cin >> s;
    vi bo(n), ao(n), co(n); // nearest O before i, nearest O after i, count of O
    bo[0] = (s[0] == 'O') - 1;
    co[0] = (s[0] == 'O');
    for (int i = 1; i < n; i++){
        bo[i] = (s[i] == 'O') ? i : bo[i-1];
        co[i] = co[i-1] + (s[i] == 'O');
    }
    ao[n-1] = (s[n-1] == 'O') ? n-1 : -1;
    for (int i = n-2; i >= 0; i--)
        ao[i] = (s[i] == 'O') ? i : ao[i+1];
    vector<pii> jc;
    deque<int> d; int cost = 0;
    for (int i = 0; i < n; i++){
        if (s[i] != 'J') continue;
        if (!d.empty())
            cost += i - d.back() - 1;
        d.push_back(i);
        if ((int)d.size() == k+1){
            int f = d.front();
            d.pop_front();
            cost -= d.front() - f - 1;
        }
        if ((int)d.size() == k)
            jc.push_back({i, cost});
    }
    vi ic(n, INF); // cost if last I is at i
    d.clear(); cost = 0;
    for (int i = n-1; i >= 0; i--){
        if (i < n-1)
            ic[i] = ic[i+1];
        if (s[i] != 'I') continue;
        if (!d.empty())
            cost += d.back() - i - 1;
        d.push_back(i);
        if ((int)d.size() == k+1){
            int f = d.front();
            d.pop_front();
            cost -= f - d.front() - 1;
        }
        if ((int)d.size() == k)
            ic[i] = min(ic[i], cost + i);
    }
    int ans = -1;
    for (auto [j, c] : jc){
        auto ptr = lower_bound(co.begin(), co.end(), co[j] + k);
        if (ptr == co.end()) break;
        int ci = ic[ptr-co.begin()];
        if (ci == INF) continue;
        int cost = ci + (c - j) - (k + 1);
        if (ans == -1 || cost < ans)
            ans = cost;
    }
    // if (co[i-1] - co[j] < k)
    //     continue;
    // int cost = (ci + i) + (cj - j) - (k + 1);
    
    cout << ans << endl;
    return 0;
}

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 376 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 344 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 344 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 376 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 1 ms 344 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 344 KB Output is correct
36 Correct 10 ms 7516 KB Output is correct
37 Correct 12 ms 8304 KB Output is correct
38 Correct 11 ms 8280 KB Output is correct
39 Correct 10 ms 8028 KB Output is correct
40 Correct 9 ms 8036 KB Output is correct
41 Correct 9 ms 8148 KB Output is correct
42 Correct 11 ms 8308 KB Output is correct
43 Correct 5 ms 5300 KB Output is correct
44 Correct 7 ms 6244 KB Output is correct
45 Correct 8 ms 8044 KB Output is correct
46 Correct 8 ms 8016 KB Output is correct
47 Correct 8 ms 8044 KB Output is correct
48 Correct 9 ms 8028 KB Output is correct
49 Correct 6 ms 5472 KB Output is correct
50 Correct 8 ms 7912 KB Output is correct
51 Correct 8 ms 8044 KB Output is correct
52 Correct 6 ms 7388 KB Output is correct
53 Correct 7 ms 7804 KB Output is correct
54 Correct 10 ms 8176 KB Output is correct
55 Correct 6 ms 7776 KB Output is correct
56 Correct 5 ms 7656 KB Output is correct