oj.uz

Submission #601203

# Submission time Handle Problem Language Result Execution time Memory
601203 2022-07-21T13:07:00 Z meatrow Building 4 (JOI20_building4) C++17
100 / 100
 872 ms 47344 KB 
#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
 
using namespace std;
const int inf = 1e9 + 5;
 
struct segm {
  int l = inf, r = 0;
  segm operator ++() {
    r++;
    l++;
    return *this; 
  }
  segm operator |(const segm& x) const { return segm{min(l, x.l), max(r, x.r)}; }
  segm operator |=(const segm& x) { return (*this = *this | x); }
  bool operator ==(const int& x) const { return l <= x && x <= r; }
};
 
int main() {
  int n;
  cin >> n;
  vector<int> A(2 * n + 1), B(2 * n + 1);
  vector<segm> atrA(2 * n + 1), atrB(2 * n + 1);
  for(int i = 1; i <= 2 * n; i++) cin >> A[i];
  for(int i = 1; i <= 2 * n; i++) cin >> B[i];
  A[0] = B[0] = -1;
  atrA[0] = segm{0, 0};
  atrB[0] = segm{0, 0};
  for(int i = 1; i <= 2 * n; i++) {
    if(A[i] >= A[i - 1]) atrA[i] |= atrA[i - 1];
    if(A[i] >= B[i - 1]) atrA[i] |= atrB[i - 1];
    if(B[i] >= A[i - 1]) atrB[i] |= atrA[i - 1];
    if(B[i] >= B[i - 1]) atrB[i] |= atrB[i - 1];
    ++atrA[i];
    
    int mn = min(A[i - 1], B[i - 1]);
    if(A[i] < mn)
      A[i] = inf;
     if(B[i] < mn)
      B[i] = inf;
    //cerr << A[i] << '\t' << B[i] << '\n' << atrA[i].l << ' ' << atrA[i].r << ", " << atrB[i].l << ' ' << atrB[i].r << '\n';
  }
  
  auto decompose = [&](auto&& self, int poz, int target, int type) -> void {
    if(poz == 0)
      return;
    int val = (type == 0? A[poz] : B[poz]), ch = (type == 0? 'A' : 'B');
    if(A[poz - 1] <= val && atrA[poz - 1] == target)
      self(self, poz - 1, target - 1, 0);
    else
      self(self, poz - 1, target,  1);
    cout << (char)ch;
  };
  if(atrA[2 * n] == n)
    decompose(decompose, 2 * n, n - 1, 0);
  else if(atrB[2 * n] == n)
    decompose(decompose, 2 * n, n, 1);
  else
    cout << "-1";
  cout << '\n';
  return 0;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 468 KB Output is correct
7 Correct 3 ms 468 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 3 ms 444 KB Output is correct
10 Correct 3 ms 468 KB Output is correct
11 Correct 3 ms 464 KB Output is correct
12 Correct 4 ms 440 KB Output is correct
13 Correct 4 ms 464 KB Output is correct
14 Correct 4 ms 468 KB Output is correct
15 Correct 4 ms 436 KB Output is correct
16 Correct 5 ms 460 KB Output is correct
17 Correct 4 ms 468 KB Output is correct
18 Correct 4 ms 436 KB Output is correct
19 Correct 3 ms 468 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 2 ms 424 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 3 ms 444 KB Output is correct
24 Correct 4 ms 468 KB Output is correct
25 Correct 3 ms 468 KB Output is correct
26 Correct 3 ms 436 KB Output is correct
27 Correct 3 ms 468 KB Output is correct
28 Correct 3 ms 416 KB Output is correct
29 Correct 3 ms 468 KB Output is correct
30 Correct 3 ms 436 KB Output is correct
31 Correct 4 ms 468 KB Output is correct
32 Correct 3 ms 468 KB Output is correct
33 Correct 3 ms 468 KB Output is correct

Subtask #2
89.0 / 89.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 3 ms 340 KB Output is correct
6 Correct 4 ms 468 KB Output is correct
7 Correct 3 ms 468 KB Output is correct
8 Correct 4 ms 468 KB Output is correct
9 Correct 3 ms 444 KB Output is correct
10 Correct 3 ms 468 KB Output is correct
11 Correct 3 ms 464 KB Output is correct
12 Correct 4 ms 440 KB Output is correct
13 Correct 4 ms 464 KB Output is correct
14 Correct 4 ms 468 KB Output is correct
15 Correct 4 ms 436 KB Output is correct
16 Correct 5 ms 460 KB Output is correct
17 Correct 4 ms 468 KB Output is correct
18 Correct 4 ms 436 KB Output is correct
19 Correct 3 ms 468 KB Output is correct
20 Correct 2 ms 468 KB Output is correct
21 Correct 2 ms 424 KB Output is correct
22 Correct 2 ms 468 KB Output is correct
23 Correct 3 ms 444 KB Output is correct
24 Correct 4 ms 468 KB Output is correct
25 Correct 3 ms 468 KB Output is correct
26 Correct 3 ms 436 KB Output is correct
27 Correct 3 ms 468 KB Output is correct
28 Correct 3 ms 416 KB Output is correct
29 Correct 3 ms 468 KB Output is correct
30 Correct 3 ms 436 KB Output is correct
31 Correct 4 ms 468 KB Output is correct
32 Correct 3 ms 468 KB Output is correct
33 Correct 3 ms 468 KB Output is correct
34 Correct 720 ms 23484 KB Output is correct
35 Correct 729 ms 41360 KB Output is correct
36 Correct 848 ms 40748 KB Output is correct
37 Correct 820 ms 41584 KB Output is correct
38 Correct 757 ms 39636 KB Output is correct
39 Correct 715 ms 42384 KB Output is correct
40 Correct 872 ms 43460 KB Output is correct
41 Correct 797 ms 40380 KB Output is correct
42 Correct 866 ms 43188 KB Output is correct
43 Correct 793 ms 44540 KB Output is correct
44 Correct 798 ms 44616 KB Output is correct
45 Correct 763 ms 44604 KB Output is correct
46 Correct 767 ms 42432 KB Output is correct
47 Correct 745 ms 45308 KB Output is correct
48 Correct 721 ms 45516 KB Output is correct
49 Correct 746 ms 46532 KB Output is correct
50 Correct 733 ms 44616 KB Output is correct
51 Correct 724 ms 44616 KB Output is correct
52 Correct 437 ms 47344 KB Output is correct
53 Correct 438 ms 47260 KB Output is correct
54 Correct 436 ms 45164 KB Output is correct
55 Correct 429 ms 47208 KB Output is correct
56 Correct 744 ms 42444 KB Output is correct
57 Correct 616 ms 44960 KB Output is correct
58 Correct 630 ms 45032 KB Output is correct
59 Correct 621 ms 45124 KB Output is correct
60 Correct 597 ms 42552 KB Output is correct
61 Correct 666 ms 45044 KB Output is correct
62 Correct 625 ms 44464 KB Output is correct
63 Correct 655 ms 45064 KB Output is correct
64 Correct 612 ms 43652 KB Output is correct
65 Correct 653 ms 45284 KB Output is correct