oj.uz

Submission #702664

# Submission time Handle Problem Language Result Execution time Memory
702664 2023-02-24T17:58:18 Z vjudge1 JJOOII 2 (JOI20_ho_t2) C++14
100 / 100
 11 ms 2280 KB 
#include "bits/stdc++.h"
using namespace std;
const int MAXN = 2e5+5;
int pref_o[MAXN];
int main() 
{
    int n, k;
    cin >> n >> k;
    string s;
    cin >> s;
    vector<int> j_idx, i_idx;
    for(int i = 0; i < n; i++)
    {
        pref_o[i] = 0;
        if(i > 0)
            pref_o[i] = pref_o[i - 1];
        if(s[i] == 'J')
            j_idx.push_back(i);
        else if(s[i] == 'O')
            pref_o[i]++;
        else
            i_idx.push_back(i);
        
    }

    int ans = 1e9;
    for(int i = k - 1; i < j_idx.size(); i++)
    {
        int j_dif = j_idx[i] - j_idx[i - (k - 1)] - (k-2) - 1;

        int l = 0, r = i_idx.size() - 1 - k + 1;
        while(l <= r)
        {
            int m = (l + r) / 2; // First i;
            if(i_idx[m] < j_idx[i])
            {
                l = m + 1;
                continue;
            }
            int temp = j_dif + (i_idx[m + k - 1] - i_idx[m] - (k-2) - 1);
            int first_i = i_idx[m];
            int last_j = j_idx[i];
            if(pref_o[first_i] - pref_o[last_j] >= k)
            {
                temp += first_i - last_j - k - 1;
                ans = min(ans, temp);
                r = m - 1;
            } else
                l = m + 1;
            
        }

        
    }

    if(ans == 1e9)
        cout << "-1\n";
    else
        cout << ans << "\n";
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:27:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |     for(int i = k - 1; i < j_idx.size(); i++)
      |                        ~~^~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 220 KB Output is correct
14 Correct 0 ms 212 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 220 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 212 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 212 KB Output is correct
6 Correct 0 ms 212 KB Output is correct
7 Correct 0 ms 212 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Correct 0 ms 220 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 0 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 0 ms 212 KB Output is correct
24 Correct 0 ms 212 KB Output is correct
25 Correct 0 ms 340 KB Output is correct
26 Correct 0 ms 212 KB Output is correct
27 Correct 0 ms 340 KB Output is correct
28 Correct 0 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Correct 0 ms 212 KB Output is correct
31 Correct 1 ms 212 KB Output is correct
32 Correct 0 ms 340 KB Output is correct
33 Correct 0 ms 340 KB Output is correct
34 Correct 0 ms 340 KB Output is correct
35 Correct 0 ms 212 KB Output is correct
36 Correct 10 ms 1796 KB Output is correct
37 Correct 11 ms 2116 KB Output is correct
38 Correct 11 ms 2272 KB Output is correct
39 Correct 10 ms 2272 KB Output is correct
40 Correct 8 ms 2088 KB Output is correct
41 Correct 10 ms 2272 KB Output is correct
42 Correct 10 ms 2096 KB Output is correct
43 Correct 5 ms 1292 KB Output is correct
44 Correct 6 ms 1632 KB Output is correct
45 Correct 8 ms 2092 KB Output is correct
46 Correct 8 ms 2120 KB Output is correct
47 Correct 8 ms 2196 KB Output is correct
48 Correct 8 ms 2272 KB Output is correct
49 Correct 5 ms 1420 KB Output is correct
50 Correct 9 ms 2280 KB Output is correct
51 Correct 8 ms 2120 KB Output is correct
52 Correct 7 ms 1824 KB Output is correct
53 Correct 7 ms 2272 KB Output is correct
54 Correct 9 ms 2268 KB Output is correct
55 Correct 7 ms 2268 KB Output is correct
56 Correct 6 ms 2268 KB Output is correct