oj.uz

답안 #529780

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
529780 2022-02-23T16:14:01 Z Alex_tz307 JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 123 ms 45340 KB 
#include <bits/stdc++.h>
#define INF 0x3f3f3f3f

using namespace std;

const int kN = 2e5;
const int kLog = 17;
int n, k, nxt[3][1 + kN][1 + kLog], nxt2[3][1 + kN];
string s;

void minSelf(int &x, int y) {
  if (y < x) {
    x = y;
  }
}

void build(int t) {
  nxt[t][n][0] = n;
  nxt2[t][n] = n;
  for (int i = n - 1; i >= 0; --i) {
    if (i + 1 < n && s[i + 1] - '0' == t) {
      nxt[t][i][0] = i + 1;
    } else {
      nxt[t][i][0] = nxt[t][i + 1][0];
    }
    if (s[i] - '0' == t) {
      nxt2[t][i] = i;
    } else {
      nxt2[t][i] = nxt2[t][i + 1];
    }
  }
  for (int i = 1; i <= kLog; ++i) {
    nxt[t][n][i] = n;
    for (int j = 0; j < n; ++j) {
      nxt[t][j][i] = nxt[t][nxt[t][j][i - 1]][i - 1];
    }
  }
}

void lift(int t, int &index) {
  for (int i = kLog; i >= 0; --i) {
    if (k & (1 << i)) {
      index = nxt[t][index][i];
    }
  }
}

void testCase() {
  cin >> n >> k >> s;
  k -= 1;
  for (int i = 0; i < n; ++i) {
    if (s[i] == 'J') {
      s[i] = '0';
    } else if (s[i] == 'O') {
      s[i] = '1';
    } else if (s[i] == 'I') {
      s[i] = '2';
    }
  }
  for (int i = 0; i < 3; ++i) {
    build(i);
  }
  int ans = INF;
  for (int i = 0; i < n; ++i) {
    if (s[i] == '0') {
      int j = i;
      for (int p = 0; p < 3; ++p) {
        lift(p, j);
        if (p + 1 < 3) {
          j = nxt2[p + 1][j];
        }
      }
      if (j < n) {
        minSelf(ans, j - i + 1 - 3 * (k + 1));
      }
    }
  }
  if (ans == INF) {
    cout << "-1\n";
  } else {
    cout << ans << '\n';
  }
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int tests = 1;
  for (int tc = 0; tc < tests; ++tc) {
    testCase();
  }
  return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 844 KB Output is correct
16 Correct 1 ms 972 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 716 KB Output is correct
19 Correct 1 ms 972 KB Output is correct
20 Correct 1 ms 972 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 1 ms 588 KB Output is correct
24 Correct 1 ms 972 KB Output is correct
25 Correct 1 ms 972 KB Output is correct
26 Correct 1 ms 972 KB Output is correct
27 Correct 1 ms 972 KB Output is correct
28 Correct 1 ms 972 KB Output is correct
29 Correct 1 ms 972 KB Output is correct
30 Correct 1 ms 972 KB Output is correct
31 Correct 1 ms 588 KB Output is correct
32 Correct 1 ms 972 KB Output is correct
33 Correct 1 ms 972 KB Output is correct
34 Correct 1 ms 972 KB Output is correct
35 Correct 1 ms 972 KB Output is correct

Subtask #3
87.0 / 87.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 0 ms 332 KB Output is correct
5 Correct 0 ms 332 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 0 ms 332 KB Output is correct
11 Correct 0 ms 332 KB Output is correct
12 Correct 0 ms 332 KB Output is correct
13 Correct 0 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 1 ms 844 KB Output is correct
16 Correct 1 ms 972 KB Output is correct
17 Correct 1 ms 972 KB Output is correct
18 Correct 1 ms 716 KB Output is correct
19 Correct 1 ms 972 KB Output is correct
20 Correct 1 ms 972 KB Output is correct
21 Correct 1 ms 972 KB Output is correct
22 Correct 1 ms 972 KB Output is correct
23 Correct 1 ms 588 KB Output is correct
24 Correct 1 ms 972 KB Output is correct
25 Correct 1 ms 972 KB Output is correct
26 Correct 1 ms 972 KB Output is correct
27 Correct 1 ms 972 KB Output is correct
28 Correct 1 ms 972 KB Output is correct
29 Correct 1 ms 972 KB Output is correct
30 Correct 1 ms 972 KB Output is correct
31 Correct 1 ms 588 KB Output is correct
32 Correct 1 ms 972 KB Output is correct
33 Correct 1 ms 972 KB Output is correct
34 Correct 1 ms 972 KB Output is correct
35 Correct 1 ms 972 KB Output is correct
36 Correct 105 ms 42332 KB Output is correct
37 Correct 104 ms 45188 KB Output is correct
38 Correct 105 ms 45224 KB Output is correct
39 Correct 116 ms 44792 KB Output is correct
40 Correct 114 ms 45200 KB Output is correct
41 Correct 115 ms 45212 KB Output is correct
42 Correct 120 ms 45224 KB Output is correct
43 Correct 57 ms 28364 KB Output is correct
44 Correct 80 ms 35160 KB Output is correct
45 Correct 114 ms 45200 KB Output is correct
46 Correct 123 ms 45264 KB Output is correct
47 Correct 115 ms 45228 KB Output is correct
48 Correct 114 ms 45240 KB Output is correct
49 Correct 62 ms 30288 KB Output is correct
50 Correct 113 ms 45340 KB Output is correct
51 Correct 118 ms 45164 KB Output is correct
52 Correct 108 ms 43488 KB Output is correct
53 Correct 112 ms 45228 KB Output is correct
54 Correct 89 ms 45236 KB Output is correct
55 Correct 89 ms 45228 KB Output is correct
56 Correct 92 ms 45224 KB Output is correct