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Submission #208336

# Submission time Handle Problem Language Result Execution time Memory
208336 2020-03-10T19:27:14 Z alexxela12345 Arranging Shoes (IOI19_shoes) C++17
100 / 100
 604 ms 54156 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

vector<ll> tree;

void add(int v, int l, int r, int ind) {
  if (ind < l || ind >= r) {
    return;
  }
  tree[v] += 1;
  if (l + 1 != r) {
    int m = l + (r - l) / 2;
    add(2 * v + 1, l, m, ind);
    add(2 * v + 2, m, r, ind);
  }
}

ll get(int v, int l, int r, int ql, int qr) {
  if (r <= ql || qr <= l) {
    return 0;
  }
  if (ql <= l && r <= qr) {
    return tree[v];
  }
  int m = l + (r - l) / 2;
  return get(2 * v + 1, l, m, ql, qr) + 
         get(2 * v + 2, m, r, ql, qr);
}

ll count_swaps(vector<int> a) {
  int n = a.size() / 2;
  ll ans = 0;
  map<int, vector<int>> last;
  vector<int> pr(2 * n, -1);
  for (int i = 2 * n - 1; i >= 0; i--) {
    last[a[i]].push_back(i);
  }
  for (int i = 0; i < 2 * n; i++) {
    if (pr[i] != -1)
      continue;
    pr[i] = last[-a[i]].back();;
    last[-a[i]].pop_back();
    last[a[i]].pop_back();
    ans += abs(pr[i] - i) - 1;
    if ((pr[i] > i) != (a[pr[i]] > a[i])) {
      ans++;
    }
    pr[pr[i]] = i;
  }
  vector<vector<int>> q;
  for (int i = 0; i < 2 * n; i++) {
    q.push_back({i});
    if (pr[i] > i) {
      // count pr[j] > pr[i] | j in [i, pr[i]]
      q.push_back({i, pr[i] + 1, -1});
      q.push_back({pr[i], pr[i] + 1, 1});
    }
  }
  tree.resize(8 * n);
  sort(q.begin(), q.end());
  for (auto &el : q) { 
    if (el.size() == 1) {
      add(0, 0, 2 * n, pr[el[0]]);
    } else {
      int x = get(0, 0, 2 * n, el[1], 2 * n);
      ans -= x * el[2];
    }
  }
  return ans;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 256 KB Output is correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 5 ms 256 KB Output is correct
19 Correct 5 ms 256 KB Output is correct
20 Correct 5 ms 256 KB Output is correct
21 Correct 5 ms 256 KB Output is correct
22 Correct 5 ms 256 KB Output is correct
23 Correct 5 ms 256 KB Output is correct
24 Correct 4 ms 256 KB Output is correct
25 Correct 5 ms 256 KB Output is correct
26 Correct 5 ms 256 KB Output is correct
27 Correct 5 ms 256 KB Output is correct
28 Correct 4 ms 256 KB Output is correct
29 Correct 5 ms 256 KB Output is correct
30 Correct 5 ms 256 KB Output is correct
31 Correct 5 ms 256 KB Output is correct
32 Correct 4 ms 256 KB Output is correct
33 Correct 5 ms 256 KB Output is correct
34 Correct 5 ms 376 KB Output is correct
35 Correct 5 ms 256 KB Output is correct
36 Correct 5 ms 256 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 4 ms 256 KB Output is correct
5 Correct 5 ms 256 KB Output is correct
6 Correct 5 ms 256 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 4 ms 256 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 4 ms 296 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 376 KB Output is correct
17 Correct 5 ms 376 KB Output is correct
18 Correct 6 ms 632 KB Output is correct
19 Correct 6 ms 632 KB Output is correct
20 Correct 19 ms 3500 KB Output is correct
21 Correct 19 ms 3500 KB Output is correct
22 Correct 158 ms 31704 KB Output is correct
23 Correct 139 ms 31684 KB Output is correct
24 Correct 149 ms 31592 KB Output is correct
25 Correct 163 ms 31820 KB Output is correct
26 Correct 160 ms 32960 KB Output is correct
27 Correct 138 ms 32712 KB Output is correct
28 Correct 167 ms 32972 KB Output is correct
29 Correct 167 ms 32968 KB Output is correct
30 Correct 160 ms 32968 KB Output is correct
31 Correct 165 ms 32860 KB Output is correct
32 Correct 163 ms 32968 KB Output is correct
33 Correct 166 ms 32712 KB Output is correct
34 Correct 163 ms 32972 KB Output is correct
35 Correct 5 ms 376 KB Output is correct
36 Correct 5 ms 256 KB Output is correct
37 Correct 159 ms 32968 KB Output is correct
38 Correct 167 ms 32968 KB Output is correct
39 Correct 170 ms 33132 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 4 ms 256 KB Output is correct
4 Correct 5 ms 424 KB Output is correct
5 Correct 494 ms 52828 KB Output is correct
6 Correct 256 ms 34788 KB Output is correct
7 Correct 468 ms 54032 KB Output is correct
8 Correct 173 ms 32968 KB Output is correct
9 Correct 455 ms 54024 KB Output is correct
10 Correct 357 ms 43148 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 256 KB Output is correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 5 ms 256 KB Output is correct
19 Correct 5 ms 256 KB Output is correct
20 Correct 5 ms 256 KB Output is correct
21 Correct 5 ms 256 KB Output is correct
22 Correct 5 ms 256 KB Output is correct
23 Correct 5 ms 256 KB Output is correct
24 Correct 4 ms 256 KB Output is correct
25 Correct 5 ms 256 KB Output is correct
26 Correct 5 ms 256 KB Output is correct
27 Correct 5 ms 256 KB Output is correct
28 Correct 4 ms 256 KB Output is correct
29 Correct 5 ms 256 KB Output is correct
30 Correct 5 ms 256 KB Output is correct
31 Correct 5 ms 256 KB Output is correct
32 Correct 4 ms 256 KB Output is correct
33 Correct 5 ms 256 KB Output is correct
34 Correct 5 ms 376 KB Output is correct
35 Correct 5 ms 256 KB Output is correct
36 Correct 5 ms 256 KB Output is correct
37 Correct 4 ms 256 KB Output is correct
38 Correct 5 ms 376 KB Output is correct
39 Correct 5 ms 376 KB Output is correct
40 Correct 5 ms 504 KB Output is correct
41 Correct 7 ms 888 KB Output is correct
42 Correct 7 ms 760 KB Output is correct
43 Correct 7 ms 760 KB Output is correct
44 Correct 7 ms 760 KB Output is correct
45 Correct 7 ms 760 KB Output is correct
46 Correct 6 ms 760 KB Output is correct
47 Correct 7 ms 760 KB Output is correct
48 Correct 7 ms 632 KB Output is correct
49 Correct 6 ms 632 KB Output is correct
50 Correct 6 ms 632 KB Output is correct
51 Correct 6 ms 632 KB Output is correct
52 Correct 7 ms 760 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 256 KB Output is correct
2 Correct 5 ms 256 KB Output is correct
3 Correct 5 ms 256 KB Output is correct
4 Correct 5 ms 256 KB Output is correct
5 Correct 4 ms 256 KB Output is correct
6 Correct 5 ms 376 KB Output is correct
7 Correct 5 ms 256 KB Output is correct
8 Correct 5 ms 256 KB Output is correct
9 Correct 5 ms 256 KB Output is correct
10 Correct 5 ms 256 KB Output is correct
11 Correct 5 ms 256 KB Output is correct
12 Correct 5 ms 256 KB Output is correct
13 Correct 4 ms 256 KB Output is correct
14 Correct 5 ms 256 KB Output is correct
15 Correct 5 ms 256 KB Output is correct
16 Correct 5 ms 256 KB Output is correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 5 ms 256 KB Output is correct
19 Correct 5 ms 256 KB Output is correct
20 Correct 5 ms 256 KB Output is correct
21 Correct 5 ms 256 KB Output is correct
22 Correct 5 ms 256 KB Output is correct
23 Correct 5 ms 256 KB Output is correct
24 Correct 4 ms 256 KB Output is correct
25 Correct 5 ms 256 KB Output is correct
26 Correct 5 ms 256 KB Output is correct
27 Correct 5 ms 256 KB Output is correct
28 Correct 4 ms 256 KB Output is correct
29 Correct 5 ms 256 KB Output is correct
30 Correct 5 ms 256 KB Output is correct
31 Correct 5 ms 256 KB Output is correct
32 Correct 4 ms 256 KB Output is correct
33 Correct 5 ms 256 KB Output is correct
34 Correct 5 ms 376 KB Output is correct
35 Correct 5 ms 256 KB Output is correct
36 Correct 5 ms 256 KB Output is correct
37 Correct 5 ms 256 KB Output is correct
38 Correct 4 ms 256 KB Output is correct
39 Correct 5 ms 256 KB Output is correct
40 Correct 5 ms 256 KB Output is correct
41 Correct 5 ms 256 KB Output is correct
42 Correct 5 ms 256 KB Output is correct
43 Correct 5 ms 256 KB Output is correct
44 Correct 5 ms 256 KB Output is correct
45 Correct 4 ms 256 KB Output is correct
46 Correct 5 ms 256 KB Output is correct
47 Correct 4 ms 296 KB Output is correct
48 Correct 5 ms 256 KB Output is correct
49 Correct 5 ms 256 KB Output is correct
50 Correct 5 ms 376 KB Output is correct
51 Correct 5 ms 376 KB Output is correct
52 Correct 6 ms 632 KB Output is correct
53 Correct 6 ms 632 KB Output is correct
54 Correct 19 ms 3500 KB Output is correct
55 Correct 19 ms 3500 KB Output is correct
56 Correct 158 ms 31704 KB Output is correct
57 Correct 139 ms 31684 KB Output is correct
58 Correct 149 ms 31592 KB Output is correct
59 Correct 163 ms 31820 KB Output is correct
60 Correct 160 ms 32960 KB Output is correct
61 Correct 138 ms 32712 KB Output is correct
62 Correct 167 ms 32972 KB Output is correct
63 Correct 167 ms 32968 KB Output is correct
64 Correct 160 ms 32968 KB Output is correct
65 Correct 165 ms 32860 KB Output is correct
66 Correct 163 ms 32968 KB Output is correct
67 Correct 166 ms 32712 KB Output is correct
68 Correct 163 ms 32972 KB Output is correct
69 Correct 5 ms 376 KB Output is correct
70 Correct 5 ms 256 KB Output is correct
71 Correct 159 ms 32968 KB Output is correct
72 Correct 167 ms 32968 KB Output is correct
73 Correct 170 ms 33132 KB Output is correct
74 Correct 5 ms 256 KB Output is correct
75 Correct 5 ms 256 KB Output is correct
76 Correct 4 ms 256 KB Output is correct
77 Correct 5 ms 424 KB Output is correct
78 Correct 494 ms 52828 KB Output is correct
79 Correct 256 ms 34788 KB Output is correct
80 Correct 468 ms 54032 KB Output is correct
81 Correct 173 ms 32968 KB Output is correct
82 Correct 455 ms 54024 KB Output is correct
83 Correct 357 ms 43148 KB Output is correct
84 Correct 4 ms 256 KB Output is correct
85 Correct 5 ms 376 KB Output is correct
86 Correct 5 ms 376 KB Output is correct
87 Correct 5 ms 504 KB Output is correct
88 Correct 7 ms 888 KB Output is correct
89 Correct 7 ms 760 KB Output is correct
90 Correct 7 ms 760 KB Output is correct
91 Correct 7 ms 760 KB Output is correct
92 Correct 7 ms 760 KB Output is correct
93 Correct 6 ms 760 KB Output is correct
94 Correct 7 ms 760 KB Output is correct
95 Correct 7 ms 632 KB Output is correct
96 Correct 6 ms 632 KB Output is correct
97 Correct 6 ms 632 KB Output is correct
98 Correct 6 ms 632 KB Output is correct
99 Correct 7 ms 760 KB Output is correct
100 Correct 7 ms 888 KB Output is correct
101 Correct 34 ms 5420 KB Output is correct
102 Correct 29 ms 4008 KB Output is correct
103 Correct 604 ms 54156 KB Output is correct
104 Correct 427 ms 54028 KB Output is correct
105 Correct 440 ms 44556 KB Output is correct
106 Correct 482 ms 54028 KB Output is correct
107 Correct 263 ms 35280 KB Output is correct
108 Correct 257 ms 37456 KB Output is correct
109 Correct 168 ms 33164 KB Output is correct
110 Correct 175 ms 32972 KB Output is correct
111 Correct 444 ms 51596 KB Output is correct
112 Correct 514 ms 49164 KB Output is correct
113 Correct 334 ms 35560 KB Output is correct
114 Correct 472 ms 54028 KB Output is correct
115 Correct 507 ms 54140 KB Output is correct