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Submission #747685

# Submission time Handle Problem Language Result Execution time Memory
747685 2023-05-24T13:21:00 Z Sami_Massah JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 16 ms 3556 KB 
#include <bits/stdc++.h>
using namespace std;


const long long maxn = 3e5 + 12, mod = 1e9 + 7, inf = 1e9 + 12 ;
long long n, k, cnt[maxn];
vector<int> locs[3];
string s;
int main(){
    cin >> n >> k;
    cin >> s;
    cnt[1] = (s[0] == 'O');
    for(int i = 1; i < n; i++)
        if(s[i] == 'O')
            cnt[i] = cnt[i - 1] + 1;
        else
            cnt[i] = cnt[i - 1];
    for(int i = 0; i < n; i++)
        if(s[i] == 'J')
            locs[0].push_back(i);
        else if(s[i] == 'O')
            locs[1].push_back(i);
        else
            locs[2].push_back(i);
    long long ans = maxn;
    for(int loc = 0; loc + k - 1 < locs[0].size(); loc++){
        int ne = locs[0][loc + k - 1];
        int l = -1, r = locs[2].size() - k + 1, mid;
        while(r - l != 1){
            int mid = (l + r) / 2;
            if(cnt[locs[2][mid]] - cnt[ne] >= k)
                r = mid;
            else
                l = mid;


        }
        if(r != locs[2].size() - k + 1)
            ans = min(ans, locs[2][r + k - 1] - locs[0][loc] + 1 - k * 3);

    }
    if(ans == maxn)
        ans = -1;
    cout << ans << endl;
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:26:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |     for(int loc = 0; loc + k - 1 < locs[0].size(); loc++){
      |                      ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
ho_t2.cpp:38:14: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare]
   38 |         if(r != locs[2].size() - k + 1)
      |            ~~^~~~~~~~~~~~~~~~~~~~~~~~~
ho_t2.cpp:28:49: warning: unused variable 'mid' [-Wunused-variable]
   28 |         int l = -1, r = locs[2].size() - k + 1, mid;
      |                                                 ^~~

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 1 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 1 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 212 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 1 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 1 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 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 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 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 0 ms 340 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 1 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 1 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 212 KB Output is correct
14 Correct 0 ms 212 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 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 1 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 0 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 0 ms 340 KB Output is correct
31 Correct 0 ms 212 KB Output is correct
32 Correct 1 ms 340 KB Output is correct
33 Correct 1 ms 340 KB Output is correct
34 Correct 1 ms 340 KB Output is correct
35 Correct 0 ms 340 KB Output is correct
36 Correct 14 ms 2732 KB Output is correct
37 Correct 16 ms 3336 KB Output is correct
38 Correct 15 ms 3488 KB Output is correct
39 Correct 15 ms 3504 KB Output is correct
40 Correct 13 ms 3556 KB Output is correct
41 Correct 16 ms 3484 KB Output is correct
42 Correct 15 ms 3364 KB Output is correct
43 Correct 8 ms 2244 KB Output is correct
44 Correct 10 ms 2612 KB Output is correct
45 Correct 12 ms 3528 KB Output is correct
46 Correct 13 ms 3536 KB Output is correct
47 Correct 12 ms 3544 KB Output is correct
48 Correct 13 ms 3552 KB Output is correct
49 Correct 9 ms 2388 KB Output is correct
50 Correct 13 ms 3408 KB Output is correct
51 Correct 12 ms 3292 KB Output is correct
52 Correct 8 ms 3032 KB Output is correct
53 Correct 9 ms 3276 KB Output is correct
54 Correct 14 ms 3552 KB Output is correct
55 Correct 9 ms 3536 KB Output is correct
56 Correct 7 ms 3552 KB Output is correct