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답안 #231689

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
231689 2020-05-14T12:55:09 Z Haunted_Cpp JJOOII 2 (JOI20_ho_t2) C++17
100 / 100
 29 ms 3212 KB 
#include <bits/stdc++.h>
 
using namespace std;

#pragma GCC optimize ("Ofast")
#pragma GCC target("fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
#pragma GCC optimize("unroll-loops")
 
int main () {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  string w;
  cin >> w;
  vector<int> prefix_j (n);
  vector<int> prefix_i (n);
  
  for (int i = 0; i < n; i++) {
    prefix_j[i] = (w[i] == 'J');
    prefix_i[i] = (w[i] == 'I');
    if (i) {
      prefix_j[i] += prefix_j[i - 1];
      prefix_i[i] += prefix_i[i - 1];
    }
  }
  prefix_j.emplace_back(prefix_j.back());
  prefix_i.emplace_back(prefix_i.back());
  auto range_sum = [&] (int lo, int hi, vector<int> &prefix) {
    return prefix[hi] - (lo - 1 >= 0 ? prefix[lo - 1] : 0);
  };
  auto upper = [&] (int lo, int hi, vector<int> &prefix) {
    if (range_sum(lo, hi, prefix) < k) {
      return (int) 1e9;
    }
    int inicio = lo;
    while (lo < hi) {
      int mid = lo + (hi - lo) / 2;
      if (range_sum(inicio, mid, prefix) >= k) hi = mid;
      else lo = mid + 1;
    }
    return hi;
  };
  auto lower = [&] (int lo, int hi, vector<int> &prefix) {
    if (range_sum(lo, hi, prefix) < k) {
      return (int) 1e9;
    }
    int inicio = hi;
    while (lo < hi) {
      int mid = lo + (hi - lo) / 2 + 1; 
      if (range_sum(mid, inicio, prefix) >= k) lo = mid;
      else hi = mid - 1;
    }
    return lo;
  };
  int lo = 0;
  int cnt = 0;
  int mn = 1e9;
  for (int hi = 0; hi < n; hi++) {
    cnt += (w[hi] == 'O');
    // Remover extra
    while (cnt > k) {
      cnt -= (w[lo] == 'O');
      ++lo;
    }
    // Ajustar janela
    while (w[lo] != 'O') {
      ++lo;
    }
    if (cnt == k) {
      int menor = lower (0, lo - 1, prefix_j);
      int maior = upper (hi + 1, n, prefix_i);
      if (menor > 1e7 || maior > 1e7) continue;
      int cur = (maior - menor + 1) - (k * 3);
      mn = min (mn, cur);
    }
  }
  cout << (mn > 1e7 ? -1 : mn) << '\n';
  return 0;
}

Subtask #1
1.0 / 1.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 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 4 ms 384 KB Output is correct
7 Correct 4 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 5 ms 384 KB Output is correct
12 Correct 5 ms 384 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

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 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 4 ms 384 KB Output is correct
7 Correct 4 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 5 ms 384 KB Output is correct
12 Correct 5 ms 384 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 6 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

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 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 4 ms 384 KB Output is correct
7 Correct 4 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 5 ms 384 KB Output is correct
12 Correct 5 ms 384 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 6 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 24 ms 2996 KB Output is correct
37 Correct 26 ms 3212 KB Output is correct
38 Correct 25 ms 3212 KB Output is correct
39 Correct 27 ms 3212 KB Output is correct
40 Correct 21 ms 3212 KB Output is correct
41 Correct 25 ms 3212 KB Output is correct
42 Correct 29 ms 3212 KB Output is correct
43 Correct 12 ms 2200 KB Output is correct
44 Correct 14 ms 2604 KB Output is correct
45 Correct 17 ms 3212 KB Output is correct
46 Correct 16 ms 3212 KB Output is correct
47 Correct 17 ms 3212 KB Output is correct
48 Correct 17 ms 3212 KB Output is correct
49 Correct 13 ms 2316 KB Output is correct
50 Correct 16 ms 3212 KB Output is correct
51 Correct 17 ms 3212 KB Output is correct
52 Correct 8 ms 3100 KB Output is correct
53 Correct 10 ms 3212 KB Output is correct
54 Correct 20 ms 3212 KB Output is correct
55 Correct 14 ms 3212 KB Output is correct
56 Correct 12 ms 3212 KB Output is correct