oj.uz

Submission #879235

# Submission time Handle Problem Language Result Execution time Memory
879235 2023-11-27T02:43:06 Z NeroZein Sorting (IOI15_sorting) C++17
100 / 100
 214 ms 23048 KB 
#include "sorting.h"
#include "bits/stdc++.h"

using namespace std; 

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
  if (is_sorted(S, S + N)) {
    return 0; 
  }
  auto check = [&](int mid) {
    vector<int> finalArray(N);
    for (int i = 0; i < N; ++i) {
      finalArray[i] = S[i];
    }
    for (int i = 0; i < mid; ++i) {
      swap(finalArray[X[i]], finalArray[Y[i]]); 
    }
    vector<int> next(N);
    vector<pair<int, int>> swaps;
    for (int i = 0; i < N; ++i) {
      next[i] = finalArray[i];
    }
    vector<bool> vis(N);
    for (int i = 0; i < N; ++i) {
      if (vis[i] || next[i] == i) continue; 
      int cur = i, nxt = next[i];
      vis[i] = true; 
      while (nxt != i) {
        vis[nxt] = true; 
        swaps.emplace_back(cur, nxt);
        cur = nxt;
        nxt = next[cur]; 
      }
    }
    vector<int> idx(N); 
    vector<int> currentArray(N);
    for (int i = 0; i < N; ++i) {
      idx[S[i]] = i; 
      currentArray[i] = S[i]; 
    }
    auto swapp = [&](int x, int y) {
      swap(idx[x], idx[y]); 
      swap(currentArray[idx[x]], currentArray[idx[y]]); 
    };
    for (int i = 0; i < (int) swaps.size(); ++i) {
      int x = currentArray[X[i]], y = currentArray[Y[i]];
      swapp(x, y); 
      auto [p, q] = swaps[i];
      P[i] = idx[p], Q[i] = idx[q]; 
      swapp(p, q); 
    }
    for (int i = (int) swaps.size(); i < mid; ++i) {
      P[i] = Q[i] = 0; 
    }
    return (int) swaps.size() <= mid; 
  };
  int l = 0, r = M; 
  while (l < r) {
    int mid = (l + r) / 2;
    if (check(mid)) {
      r = mid; 
    } else {
      l = mid + 1; 
    }
  }
  check(l); 
  return l; 
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 444 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 504 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 1 ms 592 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 344 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 444 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 504 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 1 ms 592 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 600 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 604 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 704 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 448 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 444 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 600 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 2 ms 604 KB Output is correct
4 Correct 1 ms 448 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 600 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 444 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 600 KB Output is correct
15 Correct 183 ms 19904 KB Output is correct
16 Correct 185 ms 20284 KB Output is correct
17 Correct 204 ms 22876 KB Output is correct
18 Correct 35 ms 13396 KB Output is correct
19 Correct 180 ms 22304 KB Output is correct
20 Correct 168 ms 22708 KB Output is correct
21 Correct 169 ms 21980 KB Output is correct
22 Correct 175 ms 16632 KB Output is correct
23 Correct 205 ms 23032 KB Output is correct
24 Correct 210 ms 21760 KB Output is correct
25 Correct 207 ms 21488 KB Output is correct
26 Correct 163 ms 21728 KB Output is correct
27 Correct 142 ms 20768 KB Output is correct
28 Correct 207 ms 23048 KB Output is correct
29 Correct 192 ms 22316 KB Output is correct
30 Correct 118 ms 21164 KB Output is correct
31 Correct 193 ms 22712 KB Output is correct
32 Correct 190 ms 21456 KB Output is correct
33 Correct 207 ms 21704 KB Output is correct
34 Correct 202 ms 22756 KB Output is correct
35 Correct 168 ms 20808 KB Output is correct
36 Correct 70 ms 20000 KB Output is correct
37 Correct 208 ms 22312 KB Output is correct
38 Correct 214 ms 22388 KB Output is correct
39 Correct 210 ms 22832 KB Output is correct