oj.uz

Submission #970670

# Submission time Handle Problem Language Result Execution time Memory
970670 2024-04-27T04:12:13 Z nguyentunglam Sorting (IOI15_sorting) C++17
74 / 100
 41 ms 19472 KB 
#include "sorting.h"
#ifdef ngu
#include "grader.cpp"
#endif // ngu
#include<bits/stdc++.h>
using namespace std;

const int N = 1e5 + 10;

int a[2][N], pos[2][N];

int cnt;

int findSwapPairs(int n, int s[], int m, int x[], int y[], int p[], int q[]) {
  int l = 0, r = m, ans = -1;

  auto check = [&] (int rounds) {
    for(int i = 0; i < n; i++) a[0][i] = a[1][i] = s[i];
    for(int i = 0; i < rounds; i++) {
      swap(a[1][x[i]], a[1][y[i]]);
    }
    cnt = 0;

    auto Swap = [&] (int j, int val1, int val2) {
      if (j == 0) {
        p[cnt] = pos[j][val1];
        q[cnt] = pos[j][val2];
      }
      swap(pos[j][val1], pos[j][val2]);
      swap(a[j][pos[j][val1]], a[j][pos[j][val2]]);
    };

    for(int i = 0; i < n; i++) pos[0][a[0][i]] = i, pos[1][a[1][i]] = i;
    for(int i = 0; i < n; i++) if (a[1][i] != i) {
      if (cnt >= rounds) {
        return false;
      }

      Swap(0, a[0][x[cnt]], a[0][y[cnt]]);

      Swap(0, a[1][i], i);
      cnt++;

      Swap(1, a[1][i], i);
//      for(int j = 0; j < n; j++) cout << a[1][j] << " "; cout << endl;
//      cout << i << endl;
//      break;
    }

    for(int i = cnt; i < rounds; i++) p[i] = q[i] = 0;

    return true;
  };

  while (l <= r) {
    int mid = l + r >> 1;
    if (check(mid)) {
      ans = mid;
      r = mid - 1;
    } else l = mid + 1;
  }

  assert(ans != -1);

  check(ans);

  for(int i = 0; i < ans; i++) {
    swap(s[x[i]], s[y[i]]);
    swap(s[p[i]], s[q[i]]);
  }

//  for(int i = 0; i < n; i++) cout << s[i] << " "; cout << endl;

  return ans;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:56:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   56 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 444 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 348 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 1 ms 344 KB Output is correct
3 Correct 0 ms 444 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 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 0 ms 348 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 1 ms 344 KB Output is correct
3 Correct 0 ms 444 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 600 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 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 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 2 ms 600 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 600 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 576 KB Output is correct
27 Correct 1 ms 600 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 524 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 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 460 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 800 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct

Subtask #6
0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 524 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 604 KB Output is correct
4 Correct 1 ms 604 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 460 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 800 KB Output is correct
11 Correct 1 ms 604 KB Output is correct
12 Correct 1 ms 604 KB Output is correct
13 Correct 1 ms 604 KB Output is correct
14 Correct 1 ms 604 KB Output is correct
15 Runtime error 41 ms 19472 KB Execution killed with signal 11
16 Halted 0 ms 0 KB -