oj.uz

Submission #242676

# Submission time Handle Problem Language Result Execution time Memory
242676 2020-06-28T23:18:45 Z fishy15 JJOOII 2 (JOI20_ho_t2) C++14
100 / 100
 15 ms 4748 KB 
#include <iostream>
#include <iomanip>
#include <fstream>
#include <vector>
#include <array>
#include <algorithm>
#include <utility>
#include <map>
#include <queue>
#include <set>
#include <cmath>

#define ll long long
#define eps 1e-8
#define MOD 1000000007

#define INF 0x3f3f3f3f
#define INFLL 0x3f3f3f3f3f3f3f3f

// change if necessary
#define MAXN 200010

using namespace std;

int n, k;
string s;
int dp[MAXN][3];
int jrem[MAXN];
int irem[MAXN];

int main() {
    cin.tie(0)->sync_with_stdio(0);

    cin >> n >> k;
    cin >> s;
    for (int i = 1; i <= n; i++) {
        switch (s[i - 1]) {
            case 'J':
                dp[i][0]++;
                break;
            case 'O':
                dp[i][1]++;
                break;
            case 'I':
                dp[i][2]++;
                break;
        }
        dp[i][0] += dp[i - 1][0];
        dp[i][1] += dp[i - 1][1];
        dp[i][2] += dp[i - 1][2];
    }

    queue<int> j;
    for (int i = 1; i <= n; i++) {
        if (s[i - 1] == 'J') {
            j.push(i);
            if (j.size() > k) j.pop();
        }
        if (j.size() == k) jrem[i] = j.front();
    }

    queue<int> ii;
    for (int i = n; i >= 1; i--) {
        if (s[i - 1] == 'I') {
            ii.push(i);
            if (ii.size() > k) ii.pop();
        }
        if (ii.size() == k) irem[i] = ii.front();
    }

    int l = 1;
    int r = 1;
    int ans = INF;
    while (l <= n) {
        while (l <= n && !jrem[l]) {
            l++;
            if (r < l) r++;
        }

        while (r <= n && dp[r][1] - dp[l][1] < k) r++;
        if (!irem[r + 1]) break;
        ans = min(ans, n - 3 * k - jrem[l] + 1 - (n - irem[r + 1]));
        l++;
    }

    if (ans == INF) {
        cout << "-1\n";
    } else {
        cout << ans << '\n';
    }

    return 0;
}

Compilation message

ho_t2.cpp: In function 'int main()':
ho_t2.cpp:57:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (j.size() > k) j.pop();
                 ~~~~~~~~~^~~
ho_t2.cpp:59:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (j.size() == k) jrem[i] = j.front();
             ~~~~~~~~~^~~~
ho_t2.cpp:66:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if (ii.size() > k) ii.pop();
                 ~~~~~~~~~~^~~
ho_t2.cpp:68:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (ii.size() == k) irem[i] = ii.front();
             ~~~~~~~~~~^~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 432 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 432 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 5 ms 384 KB Output is correct
35 Correct 5 ms 384 KB Output is correct

Subtask #3
87.0 / 87.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 256 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 4 ms 384 KB Output is correct
12 Correct 5 ms 432 KB Output is correct
13 Correct 4 ms 384 KB Output is correct
14 Correct 5 ms 384 KB Output is correct
15 Correct 5 ms 384 KB Output is correct
16 Correct 5 ms 384 KB Output is correct
17 Correct 5 ms 384 KB Output is correct
18 Correct 5 ms 384 KB Output is correct
19 Correct 5 ms 384 KB Output is correct
20 Correct 5 ms 384 KB Output is correct
21 Correct 5 ms 384 KB Output is correct
22 Correct 5 ms 384 KB Output is correct
23 Correct 5 ms 384 KB Output is correct
24 Correct 5 ms 384 KB Output is correct
25 Correct 5 ms 384 KB Output is correct
26 Correct 5 ms 384 KB Output is correct
27 Correct 5 ms 384 KB Output is correct
28 Correct 5 ms 384 KB Output is correct
29 Correct 5 ms 384 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 5 ms 384 KB Output is correct
32 Correct 5 ms 384 KB Output is correct
33 Correct 5 ms 384 KB Output is correct
34 Correct 5 ms 384 KB Output is correct
35 Correct 5 ms 384 KB Output is correct
36 Correct 13 ms 4492 KB Output is correct
37 Correct 14 ms 4748 KB Output is correct
38 Correct 14 ms 4748 KB Output is correct
39 Correct 15 ms 4620 KB Output is correct
40 Correct 12 ms 4364 KB Output is correct
41 Correct 14 ms 4620 KB Output is correct
42 Correct 14 ms 4748 KB Output is correct
43 Correct 9 ms 2816 KB Output is correct
44 Correct 11 ms 3468 KB Output is correct
45 Correct 13 ms 4492 KB Output is correct
46 Correct 13 ms 4364 KB Output is correct
47 Correct 12 ms 4364 KB Output is correct
48 Correct 14 ms 4364 KB Output is correct
49 Correct 10 ms 2956 KB Output is correct
50 Correct 13 ms 4364 KB Output is correct
51 Correct 12 ms 4364 KB Output is correct
52 Correct 12 ms 3724 KB Output is correct
53 Correct 13 ms 3852 KB Output is correct
54 Correct 10 ms 4748 KB Output is correct
55 Correct 10 ms 4748 KB Output is correct
56 Correct 10 ms 4748 KB Output is correct