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Submission #375303

# Submission time Handle Problem Language Result Execution time Memory
375303 2021-03-09T07:12:17 Z Mamnoon_Siam Swap (BOI16_swap) C++17
68 / 100
 886 ms 262148 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;
using ii = pair<int, int>;
using vi = vector<int>;
#define all(v) begin(v), end(v)
#define sz(v) (int)(v).size()
#define fi first
#define se second

const int N = 4e5 + 3;

map<int, vi> dp[N];
int a[N], n, nn;
vi todo[N];

vi merge(vi& p, vi& q, int x) {
  vi r; r.reserve(sz(p)+sz(q)+1);
  r.emplace_back(x);
  int pw = 1;
  int i = 0, j = 0;
  while(i < sz(p) or j < sz(q)) {
    r.insert(r.end(), p.begin()+i, p.begin()+min(sz(p), i+pw));
    r.insert(r.end(), q.begin()+j, q.begin()+min(sz(q), j+pw));
    i = min(i+pw, sz(p));
    j = min(j+pw, sz(q));
    pw *= 2;
  }
  return r;
}

int main(int argc, char* argv[]) {
  cin.sync_with_stdio(0); cin.tie(0);
  cin.exceptions(cin.failbit);
#ifdef LOCAL
  freopen("in", "r", stdin);
#endif
  cin >> n;
  nn = 1;
  while(nn-1 < n) nn *= 2;
  nn--;
  for(int i = 1; i <= n; ++i)
    cin >> a[i];
  for(int i = n+1; i <= nn; ++i)
    a[i] = n+1;
  for(int i:{1,2,3})
    if(i <= nn) todo[1].emplace_back(a[i]);
  sort(all(todo[1]));
  todo[1].erase(unique(all(todo[1])), todo[1].end());
  for(int i = 2; i <= nn; ++i) {
    for(int j:{i,2*i,2*i+1})
      if(j <= nn) todo[i].emplace_back(a[j]);
    int u = i;
    while(u != 1) {
      if(u & 1) {
        todo[i].emplace_back(a[u^1]);
      }
      todo[i].emplace_back(a[u>>1]);
      u >>= 1;
    }
    sort(all(todo[i]));
    todo[i].erase(unique(all(todo[i])), todo[i].end());
  }
  for(int i = nn/2+1; i <= nn; ++i) {
    for(int x : todo[i])
      dp[i][x] = {x};
  }
  for(int u = nn/2; u >= 1; --u) {
    for(int k : todo[u]) {
      vi& ret = dp[u][k];
      { // don't use any edge
        vi& l = dp[2*u][a[2*u]];
        vi& r = dp[2*u+1][a[2*u+1]];
        ret = merge(l, r, k);
      }
      { // use only left edge
        vi& l = dp[2*u][k];
        vi& r = dp[2*u+1][a[2*u+1]];
        vi tmp = merge(l, r, a[2*u]);
        ret = min(ret, tmp);
      }
      { // use only right edge
        vi& l = dp[2*u][a[2*u]];
        vi& r = dp[2*u+1][k];
        vi tmp = merge(l, r, a[2*u+1]);
        ret = min(ret, tmp);
      }
      { // use both edges
        vi& l = dp[2*u][k];
        vi& r = dp[2*u+1][a[2*u]];
        vi tmp = merge(l, r, a[2*u+1]);
        ret = min(ret, tmp);
      }
    }
    dp[2*u].clear();
    dp[2*u+1].clear();
  }
  vi ans = dp[1][a[1]];
  for(int i = 0; i < n; ++i)
    cout << ans[i] << ' ';
  cout << endl;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 28524 KB Output is correct
2 Correct 21 ms 28524 KB Output is correct
3 Correct 20 ms 28524 KB Output is correct
4 Correct 20 ms 28524 KB Output is correct
5 Correct 19 ms 28524 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 28524 KB Output is correct
2 Correct 21 ms 28524 KB Output is correct
3 Correct 20 ms 28524 KB Output is correct
4 Correct 20 ms 28524 KB Output is correct
5 Correct 19 ms 28524 KB Output is correct
6 Correct 20 ms 28524 KB Output is correct
7 Correct 20 ms 28524 KB Output is correct
8 Correct 21 ms 28524 KB Output is correct
9 Correct 20 ms 28524 KB Output is correct
10 Correct 19 ms 28524 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 28524 KB Output is correct
2 Correct 21 ms 28524 KB Output is correct
3 Correct 20 ms 28524 KB Output is correct
4 Correct 20 ms 28524 KB Output is correct
5 Correct 19 ms 28524 KB Output is correct
6 Correct 20 ms 28524 KB Output is correct
7 Correct 20 ms 28524 KB Output is correct
8 Correct 21 ms 28524 KB Output is correct
9 Correct 20 ms 28524 KB Output is correct
10 Correct 19 ms 28524 KB Output is correct
11 Correct 27 ms 29548 KB Output is correct
12 Correct 27 ms 29568 KB Output is correct
13 Correct 26 ms 29560 KB Output is correct
14 Correct 26 ms 29548 KB Output is correct
15 Correct 25 ms 29568 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 28524 KB Output is correct
2 Correct 21 ms 28524 KB Output is correct
3 Correct 20 ms 28524 KB Output is correct
4 Correct 20 ms 28524 KB Output is correct
5 Correct 19 ms 28524 KB Output is correct
6 Correct 20 ms 28524 KB Output is correct
7 Correct 20 ms 28524 KB Output is correct
8 Correct 21 ms 28524 KB Output is correct
9 Correct 20 ms 28524 KB Output is correct
10 Correct 19 ms 28524 KB Output is correct
11 Correct 27 ms 29548 KB Output is correct
12 Correct 27 ms 29568 KB Output is correct
13 Correct 26 ms 29560 KB Output is correct
14 Correct 26 ms 29548 KB Output is correct
15 Correct 25 ms 29568 KB Output is correct
16 Correct 845 ms 121932 KB Output is correct
17 Correct 857 ms 122220 KB Output is correct
18 Correct 886 ms 122348 KB Output is correct
19 Correct 797 ms 122220 KB Output is correct
20 Correct 784 ms 122348 KB Output is correct

Subtask #5
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 28524 KB Output is correct
2 Correct 21 ms 28524 KB Output is correct
3 Correct 20 ms 28524 KB Output is correct
4 Correct 20 ms 28524 KB Output is correct
5 Correct 19 ms 28524 KB Output is correct
6 Correct 20 ms 28524 KB Output is correct
7 Correct 20 ms 28524 KB Output is correct
8 Correct 21 ms 28524 KB Output is correct
9 Correct 20 ms 28524 KB Output is correct
10 Correct 19 ms 28524 KB Output is correct
11 Correct 27 ms 29548 KB Output is correct
12 Correct 27 ms 29568 KB Output is correct
13 Correct 26 ms 29560 KB Output is correct
14 Correct 26 ms 29548 KB Output is correct
15 Correct 25 ms 29568 KB Output is correct
16 Correct 845 ms 121932 KB Output is correct
17 Correct 857 ms 122220 KB Output is correct
18 Correct 886 ms 122348 KB Output is correct
19 Correct 797 ms 122220 KB Output is correct
20 Correct 784 ms 122348 KB Output is correct
21 Runtime error 600 ms 262148 KB Execution killed with signal 9
22 Halted 0 ms 0 KB -