답안 #1084599

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1084599 2024-09-06T13:06:38 Z rxlfd314 Bulldozer (JOI17_bulldozer) C++17
100 / 100
619 ms 33532 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])
        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 ari2{X[a], Y[a]} < ari2{X[b], Y[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';
}
# 결과 실행 시간 메모리 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 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 684 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 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
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 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 352 KB Output is correct
14 Correct 0 ms 356 KB Output is correct
15 Correct 0 ms 352 KB Output is correct
16 Correct 0 ms 408 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 352 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 608 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 464 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 2 ms 856 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 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 352 KB Output is correct
14 Correct 0 ms 356 KB Output is correct
15 Correct 0 ms 352 KB Output is correct
16 Correct 0 ms 408 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 352 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 608 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 464 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 2 ms 856 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 616 ms 33456 KB Output is correct
34 Correct 592 ms 33468 KB Output is correct
35 Correct 576 ms 33480 KB Output is correct
36 Correct 592 ms 33480 KB Output is correct
37 Correct 601 ms 33492 KB Output is correct
38 Correct 598 ms 33472 KB Output is correct
39 Correct 593 ms 33480 KB Output is correct
40 Correct 577 ms 33480 KB Output is correct
41 Correct 600 ms 33480 KB Output is correct
42 Correct 585 ms 33476 KB Output is correct
43 Correct 600 ms 33468 KB Output is correct
44 Correct 581 ms 33468 KB Output is correct
45 Correct 570 ms 33364 KB Output is correct
46 Correct 616 ms 33472 KB Output is correct
47 Correct 589 ms 33472 KB Output is correct
48 Correct 570 ms 33452 KB Output is correct
49 Correct 569 ms 33468 KB Output is correct
50 Correct 595 ms 33476 KB Output is correct
51 Correct 595 ms 33344 KB Output is correct
52 Correct 598 ms 33468 KB Output is correct
53 Correct 577 ms 33476 KB Output is correct
54 Correct 598 ms 33344 KB Output is correct
# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 600 KB Output is correct
2 Correct 1 ms 604 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 2 ms 604 KB Output is correct
5 Correct 1 ms 604 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 604 KB Output is correct
8 Correct 2 ms 604 KB Output is correct
9 Correct 2 ms 604 KB Output is correct
10 Correct 1 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 352 KB Output is correct
14 Correct 0 ms 356 KB Output is correct
15 Correct 0 ms 352 KB Output is correct
16 Correct 0 ms 408 KB Output is correct
17 Correct 0 ms 344 KB Output is correct
18 Correct 0 ms 352 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 352 KB Output is correct
21 Correct 1 ms 604 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 1 ms 608 KB Output is correct
24 Correct 1 ms 604 KB Output is correct
25 Correct 1 ms 464 KB Output is correct
26 Correct 1 ms 604 KB Output is correct
27 Correct 1 ms 600 KB Output is correct
28 Correct 1 ms 604 KB Output is correct
29 Correct 1 ms 604 KB Output is correct
30 Correct 1 ms 604 KB Output is correct
31 Correct 2 ms 856 KB Output is correct
32 Correct 1 ms 604 KB Output is correct
33 Correct 616 ms 33456 KB Output is correct
34 Correct 592 ms 33468 KB Output is correct
35 Correct 576 ms 33480 KB Output is correct
36 Correct 592 ms 33480 KB Output is correct
37 Correct 601 ms 33492 KB Output is correct
38 Correct 598 ms 33472 KB Output is correct
39 Correct 593 ms 33480 KB Output is correct
40 Correct 577 ms 33480 KB Output is correct
41 Correct 600 ms 33480 KB Output is correct
42 Correct 585 ms 33476 KB Output is correct
43 Correct 600 ms 33468 KB Output is correct
44 Correct 581 ms 33468 KB Output is correct
45 Correct 570 ms 33364 KB Output is correct
46 Correct 616 ms 33472 KB Output is correct
47 Correct 589 ms 33472 KB Output is correct
48 Correct 570 ms 33452 KB Output is correct
49 Correct 569 ms 33468 KB Output is correct
50 Correct 595 ms 33476 KB Output is correct
51 Correct 595 ms 33344 KB Output is correct
52 Correct 598 ms 33468 KB Output is correct
53 Correct 577 ms 33476 KB Output is correct
54 Correct 598 ms 33344 KB Output is correct
55 Correct 570 ms 33532 KB Output is correct
56 Correct 606 ms 33468 KB Output is correct
57 Correct 613 ms 33476 KB Output is correct
58 Correct 598 ms 33472 KB Output is correct
59 Correct 595 ms 33468 KB Output is correct
60 Correct 600 ms 33472 KB Output is correct
61 Correct 575 ms 33452 KB Output is correct
62 Correct 619 ms 33468 KB Output is correct
63 Correct 592 ms 33468 KB Output is correct
64 Correct 602 ms 33480 KB Output is correct
65 Correct 598 ms 33472 KB Output is correct
66 Correct 603 ms 33452 KB Output is correct
67 Correct 588 ms 33468 KB Output is correct
68 Correct 612 ms 33472 KB Output is correct
69 Correct 602 ms 33468 KB Output is correct
70 Correct 579 ms 33480 KB Output is correct
71 Correct 585 ms 33448 KB Output is correct
72 Correct 617 ms 33468 KB Output is correct
73 Correct 597 ms 33476 KB Output is correct
74 Correct 595 ms 33472 KB Output is correct
# 결과 실행 시간 메모리 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 1 ms 604 KB Output is correct
6 Correct 1 ms 604 KB Output is correct
7 Correct 1 ms 684 KB Output is correct
8 Correct 1 ms 604 KB Output is correct
9 Correct 1 ms 604 KB Output is correct
10 Correct 1 ms 604 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 344 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 600 KB Output is correct
17 Correct 1 ms 604 KB Output is correct
18 Correct 1 ms 460 KB Output is correct
19 Correct 2 ms 604 KB Output is correct
20 Correct 1 ms 604 KB Output is correct
21 Correct 1 ms 460 KB Output is correct
22 Correct 1 ms 604 KB Output is correct
23 Correct 2 ms 604 KB Output is correct
24 Correct 2 ms 604 KB Output is correct
25 Correct 1 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 352 KB Output is correct
29 Correct 0 ms 356 KB Output is correct
30 Correct 0 ms 352 KB Output is correct
31 Correct 0 ms 408 KB Output is correct
32 Correct 0 ms 344 KB Output is correct
33 Correct 0 ms 352 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 352 KB Output is correct
36 Correct 1 ms 604 KB Output is correct
37 Correct 1 ms 604 KB Output is correct
38 Correct 1 ms 608 KB Output is correct
39 Correct 1 ms 604 KB Output is correct
40 Correct 1 ms 464 KB Output is correct
41 Correct 1 ms 604 KB Output is correct
42 Correct 1 ms 600 KB Output is correct
43 Correct 1 ms 604 KB Output is correct
44 Correct 1 ms 604 KB Output is correct
45 Correct 1 ms 604 KB Output is correct
46 Correct 2 ms 856 KB Output is correct
47 Correct 1 ms 604 KB Output is correct
48 Correct 616 ms 33456 KB Output is correct
49 Correct 592 ms 33468 KB Output is correct
50 Correct 576 ms 33480 KB Output is correct
51 Correct 592 ms 33480 KB Output is correct
52 Correct 601 ms 33492 KB Output is correct
53 Correct 598 ms 33472 KB Output is correct
54 Correct 593 ms 33480 KB Output is correct
55 Correct 577 ms 33480 KB Output is correct
56 Correct 600 ms 33480 KB Output is correct
57 Correct 585 ms 33476 KB Output is correct
58 Correct 600 ms 33468 KB Output is correct
59 Correct 581 ms 33468 KB Output is correct
60 Correct 570 ms 33364 KB Output is correct
61 Correct 616 ms 33472 KB Output is correct
62 Correct 589 ms 33472 KB Output is correct
63 Correct 570 ms 33452 KB Output is correct
64 Correct 569 ms 33468 KB Output is correct
65 Correct 595 ms 33476 KB Output is correct
66 Correct 595 ms 33344 KB Output is correct
67 Correct 598 ms 33468 KB Output is correct
68 Correct 577 ms 33476 KB Output is correct
69 Correct 598 ms 33344 KB Output is correct
70 Correct 570 ms 33532 KB Output is correct
71 Correct 606 ms 33468 KB Output is correct
72 Correct 613 ms 33476 KB Output is correct
73 Correct 598 ms 33472 KB Output is correct
74 Correct 595 ms 33468 KB Output is correct
75 Correct 600 ms 33472 KB Output is correct
76 Correct 575 ms 33452 KB Output is correct
77 Correct 619 ms 33468 KB Output is correct
78 Correct 592 ms 33468 KB Output is correct
79 Correct 602 ms 33480 KB Output is correct
80 Correct 598 ms 33472 KB Output is correct
81 Correct 603 ms 33452 KB Output is correct
82 Correct 588 ms 33468 KB Output is correct
83 Correct 612 ms 33472 KB Output is correct
84 Correct 602 ms 33468 KB Output is correct
85 Correct 579 ms 33480 KB Output is correct
86 Correct 585 ms 33448 KB Output is correct
87 Correct 617 ms 33468 KB Output is correct
88 Correct 597 ms 33476 KB Output is correct
89 Correct 595 ms 33472 KB Output is correct
90 Correct 596 ms 33468 KB Output is correct
91 Correct 603 ms 33476 KB Output is correct
92 Correct 598 ms 33412 KB Output is correct
93 Correct 591 ms 33480 KB Output is correct
94 Correct 603 ms 33480 KB Output is correct
95 Correct 612 ms 33476 KB Output is correct
96 Correct 600 ms 33492 KB Output is correct
97 Correct 587 ms 33468 KB Output is correct
98 Correct 600 ms 33476 KB Output is correct
99 Correct 611 ms 33480 KB Output is correct
100 Correct 288 ms 17100 KB Output is correct
101 Correct 284 ms 17096 KB Output is correct
102 Correct 300 ms 17100 KB Output is correct
103 Correct 287 ms 17100 KB Output is correct
104 Correct 285 ms 17100 KB Output is correct
105 Correct 404 ms 33472 KB Output is correct
106 Correct 386 ms 33476 KB Output is correct
107 Correct 391 ms 33476 KB Output is correct
108 Correct 397 ms 33480 KB Output is correct
109 Correct 404 ms 33476 KB Output is correct
110 Correct 533 ms 33480 KB Output is correct
111 Correct 560 ms 33480 KB Output is correct
112 Correct 556 ms 33480 KB Output is correct
113 Correct 571 ms 33468 KB Output is correct
114 Correct 542 ms 33472 KB Output is correct
115 Correct 555 ms 33464 KB Output is correct
116 Correct 562 ms 33480 KB Output is correct
117 Correct 546 ms 33448 KB Output is correct
118 Correct 561 ms 33464 KB Output is correct
119 Correct 559 ms 33468 KB Output is correct
120 Correct 0 ms 344 KB Output is correct
121 Correct 0 ms 600 KB Output is correct
122 Correct 585 ms 33392 KB Output is correct
123 Correct 584 ms 33468 KB Output is correct
124 Correct 617 ms 33480 KB Output is correct
125 Correct 588 ms 33480 KB Output is correct
126 Correct 584 ms 33316 KB Output is correct
127 Correct 580 ms 33360 KB Output is correct
128 Correct 584 ms 33472 KB Output is correct
129 Correct 581 ms 33472 KB Output is correct
130 Correct 604 ms 33480 KB Output is correct
131 Correct 568 ms 33468 KB Output is correct
132 Correct 612 ms 33476 KB Output is correct
133 Correct 579 ms 33480 KB Output is correct