oj.uz

Submission #1084591

# Submission time Handle Problem Language Result Execution time Memory
1084591 2024-09-06T12:52:23 Z rxlfd314 Bulldozer (JOI17_bulldozer) C++17
60 / 100
 646 ms 33732 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ari2 = array<int, 2>;

#define vt vector
#define size(x) (int((x).size()))
#define all(x) begin(x), end(x)

#define REP(a,b,c,d) for(int a=(b);(d)>0?a<=(c):a>=(c);a+=(d))
#define FOR(a,b,c) REP(a,b,c,1)
#define ROF(a,b,c) REP(a,b,c,-1)

constexpr int mxN = 2005;
int N, X[mxN], Y[mxN], W[mxN];

struct Event {
  int y, x, i, j;
  Event(int _y, int _x, int _i, int _j) : y(_y), x(_x), i(_i), j(_j) {
    if (x < 0)
      y = -y, x = -x;
  }
};

struct Node {
  ll ans, lft, rht, sum;
  Node operator+(const Node &other) {
    return {
      max({ans, other.ans, rht + other.lft}),
      max(lft, sum + other.lft),
      max(other.rht, other.sum + rht),
      sum + other.sum
    };
  }
};

struct ST {
  Node st[mxN<<1];
  void update(int i, int v) {
    st[i+=N] = {max(v, 0), max(v, 0), max(v, 0), v};
    for (i >>= 1; i > 0; i >>= 1)
      st[i] = st[i<<1] + st[i<<1|1];
  }
  Node query(int l, int r) {
    Node lft = {0, 0, 0, 0};
    Node rht = {0, 0, 0, 0};
    for (l += N, r += N+1; l < r; l >>= 1, r >>= 1) {
      if (l & 1)
        lft = lft + st[l++];
      if (r & 1)
        rht = st[--r] + rht;
    }
    return lft + rht;
  }
} st;

signed main() {
#ifndef DEBUG
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
#endif
  cin >> N;
  vt<Event> sweep;
  FOR(i, 0, N-1)
    cin >> X[i] >> Y[i] >> W[i];
  FOR(i, 0, N-1)
    FOR(j, 0, N-1)
      if (i != j && (X[i] > X[j] || X[i] == X[j] && Y[i] > Y[j]))
        sweep.push_back(Event(Y[i] - Y[j], X[i] - X[j], i, j));
  
  sort(all(sweep), [&](const Event &a, const Event &b) {
    ll va = 1ll * a.y * b.x;
    ll vb = 1ll * b.y * a.x;
    return va != vb ? va < vb : ari2{-X[a.i], -X[a.j]} < ari2{-X[b.i], -X[b.j]};
  });
  
  vt<int> ord(N);
  iota(all(ord), 0);
  sort(all(ord), [&](const int &a, const int &b) {
    return X[a] < X[b];    
  });
  
  vt<int> pos(N);
  FOR(ii, 0, N-1) {
    const int i = ord[ii];
    pos[i] = ii;
    st.update(ii, W[i]);
  }
  
  ll ans = st.query(0, N-1).ans;
  FOR(k, 0, size(sweep)-1) {
    auto [y, x, i, j] = sweep[k];
    st.update(pos[i], W[j]);
    st.update(pos[j], W[i]);
    swap(pos[i], pos[j]);
    if (k == size(sweep)-1 || 1ll * y * sweep[k+1].x != 1ll * sweep[k+1].y * x)
      ans = max(ans, st.query(0, N-1).ans);
  }
  
  cout << ans << '\n';
}

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:68:50: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   68 |       if (i != j && (X[i] > X[j] || X[i] == X[j] && Y[i] > Y[j]))
      |                                     ~~~~~~~~~~~~~^~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 688 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 600 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 456 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 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 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 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 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 628 ms 33408 KB Output is correct
34 Correct 610 ms 33472 KB Output is correct
35 Correct 575 ms 33472 KB Output is correct
36 Correct 595 ms 33512 KB Output is correct
37 Correct 604 ms 33732 KB Output is correct
38 Correct 584 ms 33500 KB Output is correct
39 Correct 628 ms 33468 KB Output is correct
40 Correct 579 ms 33380 KB Output is correct
41 Correct 609 ms 33452 KB Output is correct
42 Correct 646 ms 33724 KB Output is correct
43 Correct 625 ms 33456 KB Output is correct
44 Correct 584 ms 33628 KB Output is correct
45 Correct 581 ms 33468 KB Output is correct
46 Correct 631 ms 33508 KB Output is correct
47 Correct 593 ms 33356 KB Output is correct
48 Correct 572 ms 33468 KB Output is correct
49 Correct 587 ms 33468 KB Output is correct
50 Correct 598 ms 33468 KB Output is correct
51 Correct 608 ms 33464 KB Output is correct
52 Correct 609 ms 33468 KB Output is correct
53 Correct 596 ms 33480 KB Output is correct
54 Correct 589 ms 33468 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 604 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 2 ms 600 KB Output is correct
6 Correct 2 ms 600 KB Output is correct
7 Correct 2 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 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 344 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 2 ms 604 KB Output is correct
23 Correct 1 ms 604 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 2 ms 600 KB Output is correct
26 Correct 2 ms 604 KB Output is correct
27 Correct 2 ms 604 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 1 ms 604 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 628 ms 33408 KB Output is correct
34 Correct 610 ms 33472 KB Output is correct
35 Correct 575 ms 33472 KB Output is correct
36 Correct 595 ms 33512 KB Output is correct
37 Correct 604 ms 33732 KB Output is correct
38 Correct 584 ms 33500 KB Output is correct
39 Correct 628 ms 33468 KB Output is correct
40 Correct 579 ms 33380 KB Output is correct
41 Correct 609 ms 33452 KB Output is correct
42 Correct 646 ms 33724 KB Output is correct
43 Correct 625 ms 33456 KB Output is correct
44 Correct 584 ms 33628 KB Output is correct
45 Correct 581 ms 33468 KB Output is correct
46 Correct 631 ms 33508 KB Output is correct
47 Correct 593 ms 33356 KB Output is correct
48 Correct 572 ms 33468 KB Output is correct
49 Correct 587 ms 33468 KB Output is correct
50 Correct 598 ms 33468 KB Output is correct
51 Correct 608 ms 33464 KB Output is correct
52 Correct 609 ms 33468 KB Output is correct
53 Correct 596 ms 33480 KB Output is correct
54 Correct 589 ms 33468 KB Output is correct
55 Correct 613 ms 33476 KB Output is correct
56 Correct 596 ms 33460 KB Output is correct
57 Correct 615 ms 33480 KB Output is correct
58 Correct 590 ms 33288 KB Output is correct
59 Correct 623 ms 33472 KB Output is correct
60 Correct 603 ms 33496 KB Output is correct
61 Correct 583 ms 33372 KB Output is correct
62 Correct 620 ms 33472 KB Output is correct
63 Correct 592 ms 33480 KB Output is correct
64 Correct 593 ms 33468 KB Output is correct
65 Incorrect 589 ms 33468 KB Output isn't correct
66 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 600 KB Output is correct
2 Correct 1 ms 600 KB Output is correct
3 Correct 1 ms 600 KB Output is correct
4 Correct 1 ms 604 KB Output is correct
5 Correct 1 ms 688 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 2 ms 600 KB Output is correct
10 Correct 2 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 456 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 2 ms 604 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 604 KB Output is correct
19 Correct 1 ms 604 KB Output is correct
20 Correct 2 ms 600 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 604 KB Output is correct
24 Correct 1 ms 460 KB Output is correct
25 Correct 2 ms 604 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 0 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 344 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 2 ms 604 KB Output is correct
38 Correct 1 ms 604 KB Output is correct
39 Correct 1 ms 604 KB Output is correct
40 Correct 2 ms 600 KB Output is correct
41 Correct 2 ms 604 KB Output is correct
42 Correct 2 ms 604 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 1 ms 460 KB Output is correct
45 Correct 1 ms 604 KB Output is correct
46 Correct 1 ms 604 KB Output is correct
47 Correct 1 ms 604 KB Output is correct
48 Correct 628 ms 33408 KB Output is correct
49 Correct 610 ms 33472 KB Output is correct
50 Correct 575 ms 33472 KB Output is correct
51 Correct 595 ms 33512 KB Output is correct
52 Correct 604 ms 33732 KB Output is correct
53 Correct 584 ms 33500 KB Output is correct
54 Correct 628 ms 33468 KB Output is correct
55 Correct 579 ms 33380 KB Output is correct
56 Correct 609 ms 33452 KB Output is correct
57 Correct 646 ms 33724 KB Output is correct
58 Correct 625 ms 33456 KB Output is correct
59 Correct 584 ms 33628 KB Output is correct
60 Correct 581 ms 33468 KB Output is correct
61 Correct 631 ms 33508 KB Output is correct
62 Correct 593 ms 33356 KB Output is correct
63 Correct 572 ms 33468 KB Output is correct
64 Correct 587 ms 33468 KB Output is correct
65 Correct 598 ms 33468 KB Output is correct
66 Correct 608 ms 33464 KB Output is correct
67 Correct 609 ms 33468 KB Output is correct
68 Correct 596 ms 33480 KB Output is correct
69 Correct 589 ms 33468 KB Output is correct
70 Correct 613 ms 33476 KB Output is correct
71 Correct 596 ms 33460 KB Output is correct
72 Correct 615 ms 33480 KB Output is correct
73 Correct 590 ms 33288 KB Output is correct
74 Correct 623 ms 33472 KB Output is correct
75 Correct 603 ms 33496 KB Output is correct
76 Correct 583 ms 33372 KB Output is correct
77 Correct 620 ms 33472 KB Output is correct
78 Correct 592 ms 33480 KB Output is correct
79 Correct 593 ms 33468 KB Output is correct
80 Incorrect 589 ms 33468 KB Output isn't correct
81 Halted 0 ms 0 KB -