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Submission #970671

# Submission time Handle Problem Language Result Execution time Memory
970671 2024-04-27T04:12:59 Z nguyentunglam Sorting (IOI15_sorting) C++17
100 / 100
 203 ms 23604 KB 
#include "sorting.h"
#ifdef ngu
#include "grader.cpp"
#endif // ngu
#include<bits/stdc++.h>
using namespace std;

const int N = 2e5 + 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 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);

  return ans;
}

Compilation message

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:53:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   53 |     int mid = l + r >> 1;
      |               ~~^~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 0 ms 2396 KB Output is correct
3 Correct 1 ms 2392 KB Output is correct
4 Correct 1 ms 2648 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 0 ms 2396 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 0 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 0 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2396 KB Output is correct
14 Correct 0 ms 2396 KB Output is correct
15 Correct 1 ms 2392 KB Output is correct
16 Correct 1 ms 2648 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 0 ms 2396 KB Output is correct
19 Correct 1 ms 2396 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 1 ms 2652 KB Output is correct
22 Correct 1 ms 2652 KB Output is correct
23 Correct 1 ms 2652 KB Output is correct
24 Correct 1 ms 2652 KB Output is correct
25 Correct 1 ms 2652 KB Output is correct
26 Correct 1 ms 2652 KB Output is correct
27 Correct 1 ms 2652 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 2 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 2 ms 2420 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 2 ms 2396 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 2 ms 2420 KB Output is correct
14 Correct 1 ms 2648 KB Output is correct
15 Correct 126 ms 12460 KB Output is correct
16 Correct 150 ms 20564 KB Output is correct
17 Correct 181 ms 22868 KB Output is correct
18 Correct 60 ms 19792 KB Output is correct
19 Correct 127 ms 21764 KB Output is correct
20 Correct 141 ms 21500 KB Output is correct
21 Correct 135 ms 21504 KB Output is correct
22 Correct 132 ms 17112 KB Output is correct
23 Correct 151 ms 22520 KB Output is correct
24 Correct 203 ms 23032 KB Output is correct
25 Correct 182 ms 21952 KB Output is correct
26 Correct 133 ms 22508 KB Output is correct
27 Correct 114 ms 20976 KB Output is correct
28 Correct 194 ms 22096 KB Output is correct
29 Correct 175 ms 21696 KB Output is correct
30 Correct 96 ms 20396 KB Output is correct
31 Correct 196 ms 22024 KB Output is correct
32 Correct 159 ms 21588 KB Output is correct
33 Correct 195 ms 22224 KB Output is correct
34 Correct 190 ms 22172 KB Output is correct
35 Correct 139 ms 21572 KB Output is correct
36 Correct 45 ms 19900 KB Output is correct
37 Correct 187 ms 23604 KB Output is correct
38 Correct 187 ms 21760 KB Output is correct
39 Correct 184 ms 21996 KB Output is correct