oj.uz

답안 #229401

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
229401 2020-05-04T12:01:31 Z fedoseevtimofey Bulldozer (JOI17_bulldozer) C++14
75 / 100
 1078 ms 33880 KB 
#include <iostream>	
#include <string>	
#include <vector>	
#include <queue>	
#include <deque>	
#include <stack>	
#include <set>	
#include <map>	
#include <unordered_map>	
#include <unordered_set>	
#include <cstring>	
#include <cmath>	
#include <cstdlib>	
#include <algorithm>	
#include <random>	
#include <iomanip>	
#include <functional>	
#include <cassert>	
 	
using namespace std;	
 	
typedef long long ll;	
 	
struct point {	
  int x, y;	
  point(int x, int y) : x(x), y(y) {}	
  point(int x) : x(x), y(x) {}	
  point() : x(0), y(0) {}	
  point operator -(const point &p) const {	
    return point(x - p.x, y - p.y);	
  }	
  ll operator *(const point &p) const {	
    return (ll)x * p.y - (ll)y * p.x;	
  }	
  int type() const {	
    return y > 0 || (y == 0 && x > 0);	
  }	
  bool operator ==(const point &p) const {	
    return x == p.x && y == p.y;	
  }	
};	

bool operator <(const point &a, const point &b) {	
  if (a.type() != b.type()) {	
    return a.type() < b.type();	
  }	
  return a * b > 0;	
}	
 	
const ll Inf = 1e18;	
 	
struct Node {	
  ll sum, best, max_pref, max_suf;	
  Node() {	
    sum = 0;	
    best = 0 ;	
    max_pref = max_suf = -Inf;	
  }	
  Node(ll x) {	
    sum = x;	
    best = max(x, 0LL);	
    max_pref = max(0LL, x);	
    max_suf = max(0LL, x);	
  }	
  Node operator +(const Node &other) const {	
    Node res;	
    res.best = max(best, other.best);	
    res.best = max(res.best, max_suf + other.max_pref);	
    res.sum = sum + other.sum;	
    res.max_pref = max(max_pref, sum + other.max_pref);	
    res.max_suf = max(other.max_suf, other.sum + max_suf);	
    return res;	
  }	
};	
 	
const int N = 4096;	
Node t[2 * N];	
 	
int n;	
 	
void modify(int id, ll val) {	
  t[N + id] = Node(val);	
  for (int v = (N + id) / 2; v >= 1; v /= 2) {	
    t[v] = t[2 * v] + t[2 * v + 1];	
  }	
}	
 
int main() {	
  ios_base::sync_with_stdio(false); cin.tie(0);	
#ifdef LOCAL	
  freopen("input.txt", "r", stdin);	
#endif	
  cin >> n;	
  map <pair <int, int>, ll> cost;	
  for (int i = 0; i < n; ++i) {	
    int x, y, w;	
    cin >> x >> y >> w;	
    cost[{x, y}] += w;	
  }	
  n = cost.size();	
  vector <point> a(n); vector <int> w(n);	
  {	
    int id = 0;	
    for (auto it = cost.begin(); it != cost.end(); ++it, ++id) {	
      a[id] = point((it->first).first, (it->first).second);	
      w[id] = it->second;	
    }	
  }	
  vector <int> p(n);
  iota(p.begin(), p.end(), 0);	
  sort(p.begin(), p.end(), [&] (int i, int j) {	
    if (a[i].y != a[j].y) return a[i].y < a[j].y;	
    return a[i].x > a[j].x;	
  });	

  vector <int> pos(n);	
  for (int i = 0; i < n; ++i) pos[p[i]] = i;	
  vector <pair <point, pair <int, int>>> dir;	
  for (int i = 0; i < n; ++i) {	
    for (int j = i + 1; j < n; ++j) {	
      if (pos[i] < pos[j]) dir.emplace_back(a[i] - a[j], make_pair(i, j));	
      else dir.emplace_back(a[j] - a[i], make_pair(i, j));
    }	
  }	
  sort(dir.begin(), dir.end());	
  for (int i = 0; i < n; ++i) {	
    modify(pos[i], w[i]);	
  }	
  ll ans = t[1].best;	
  for (auto d : dir) {	
    int i = d.second.first, j = d.second.second;	
    modify(pos[i], w[j]);	
    modify(pos[j], w[i]);	
    swap(pos[i], pos[j]);	
    ans = max(ans, t[1].best);	
  }	
 	
  cout << ans << '\n';	
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 816 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 896 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 7 ms 816 KB Output is correct
5 Correct 7 ms 896 KB Output is correct
6 Correct 7 ms 896 KB Output is correct
7 Correct 7 ms 816 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 7 ms 816 KB Output is correct
11 Correct 5 ms 640 KB Output is correct
12 Correct 5 ms 640 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 5 ms 640 KB Output is correct
15 Correct 5 ms 640 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 5 ms 640 KB Output is correct
18 Correct 5 ms 640 KB Output is correct
19 Correct 5 ms 640 KB Output is correct
20 Correct 5 ms 640 KB Output is correct
21 Correct 7 ms 768 KB Output is correct
22 Correct 7 ms 768 KB Output is correct
23 Correct 7 ms 768 KB Output is correct
24 Correct 7 ms 768 KB Output is correct
25 Correct 8 ms 768 KB Output is correct
26 Correct 7 ms 896 KB Output is correct
27 Correct 7 ms 768 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 816 KB Output is correct
30 Correct 6 ms 768 KB Output is correct
31 Correct 7 ms 768 KB Output is correct
32 Correct 7 ms 768 KB Output is correct

Subtask #3
35.0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 896 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 7 ms 816 KB Output is correct
5 Correct 7 ms 896 KB Output is correct
6 Correct 7 ms 896 KB Output is correct
7 Correct 7 ms 816 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 7 ms 816 KB Output is correct
11 Correct 5 ms 640 KB Output is correct
12 Correct 5 ms 640 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 5 ms 640 KB Output is correct
15 Correct 5 ms 640 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 5 ms 640 KB Output is correct
18 Correct 5 ms 640 KB Output is correct
19 Correct 5 ms 640 KB Output is correct
20 Correct 5 ms 640 KB Output is correct
21 Correct 7 ms 768 KB Output is correct
22 Correct 7 ms 768 KB Output is correct
23 Correct 7 ms 768 KB Output is correct
24 Correct 7 ms 768 KB Output is correct
25 Correct 8 ms 768 KB Output is correct
26 Correct 7 ms 896 KB Output is correct
27 Correct 7 ms 768 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 816 KB Output is correct
30 Correct 6 ms 768 KB Output is correct
31 Correct 7 ms 768 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 1055 ms 33880 KB Output is correct
34 Correct 1045 ms 33760 KB Output is correct
35 Correct 1038 ms 33744 KB Output is correct
36 Correct 1042 ms 33744 KB Output is correct
37 Correct 1056 ms 33856 KB Output is correct
38 Correct 1033 ms 33768 KB Output is correct
39 Correct 1046 ms 33760 KB Output is correct
40 Correct 1042 ms 33744 KB Output is correct
41 Correct 1055 ms 33760 KB Output is correct
42 Correct 1057 ms 33880 KB Output is correct
43 Correct 1054 ms 33856 KB Output is correct
44 Correct 1032 ms 33744 KB Output is correct
45 Correct 1031 ms 33744 KB Output is correct
46 Correct 1061 ms 33764 KB Output is correct
47 Correct 1044 ms 33872 KB Output is correct
48 Correct 1016 ms 33744 KB Output is correct
49 Correct 1042 ms 33732 KB Output is correct
50 Correct 1038 ms 33768 KB Output is correct
51 Correct 1030 ms 33748 KB Output is correct
52 Correct 1078 ms 33744 KB Output is correct
53 Correct 1050 ms 33760 KB Output is correct
54 Correct 1040 ms 33752 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 7 ms 896 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 6 ms 768 KB Output is correct
4 Correct 7 ms 816 KB Output is correct
5 Correct 7 ms 896 KB Output is correct
6 Correct 7 ms 896 KB Output is correct
7 Correct 7 ms 816 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 7 ms 816 KB Output is correct
11 Correct 5 ms 640 KB Output is correct
12 Correct 5 ms 640 KB Output is correct
13 Correct 5 ms 640 KB Output is correct
14 Correct 5 ms 640 KB Output is correct
15 Correct 5 ms 640 KB Output is correct
16 Correct 5 ms 640 KB Output is correct
17 Correct 5 ms 640 KB Output is correct
18 Correct 5 ms 640 KB Output is correct
19 Correct 5 ms 640 KB Output is correct
20 Correct 5 ms 640 KB Output is correct
21 Correct 7 ms 768 KB Output is correct
22 Correct 7 ms 768 KB Output is correct
23 Correct 7 ms 768 KB Output is correct
24 Correct 7 ms 768 KB Output is correct
25 Correct 8 ms 768 KB Output is correct
26 Correct 7 ms 896 KB Output is correct
27 Correct 7 ms 768 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 816 KB Output is correct
30 Correct 6 ms 768 KB Output is correct
31 Correct 7 ms 768 KB Output is correct
32 Correct 7 ms 768 KB Output is correct
33 Correct 1055 ms 33880 KB Output is correct
34 Correct 1045 ms 33760 KB Output is correct
35 Correct 1038 ms 33744 KB Output is correct
36 Correct 1042 ms 33744 KB Output is correct
37 Correct 1056 ms 33856 KB Output is correct
38 Correct 1033 ms 33768 KB Output is correct
39 Correct 1046 ms 33760 KB Output is correct
40 Correct 1042 ms 33744 KB Output is correct
41 Correct 1055 ms 33760 KB Output is correct
42 Correct 1057 ms 33880 KB Output is correct
43 Correct 1054 ms 33856 KB Output is correct
44 Correct 1032 ms 33744 KB Output is correct
45 Correct 1031 ms 33744 KB Output is correct
46 Correct 1061 ms 33764 KB Output is correct
47 Correct 1044 ms 33872 KB Output is correct
48 Correct 1016 ms 33744 KB Output is correct
49 Correct 1042 ms 33732 KB Output is correct
50 Correct 1038 ms 33768 KB Output is correct
51 Correct 1030 ms 33748 KB Output is correct
52 Correct 1078 ms 33744 KB Output is correct
53 Correct 1050 ms 33760 KB Output is correct
54 Correct 1040 ms 33752 KB Output is correct
55 Correct 1057 ms 33752 KB Output is correct
56 Correct 1065 ms 33764 KB Output is correct
57 Correct 1056 ms 33768 KB Output is correct
58 Correct 1043 ms 33744 KB Output is correct
59 Correct 1057 ms 33756 KB Output is correct
60 Correct 1045 ms 33872 KB Output is correct
61 Correct 1040 ms 33752 KB Output is correct
62 Correct 1075 ms 33744 KB Output is correct
63 Correct 1048 ms 33756 KB Output is correct
64 Correct 1055 ms 33768 KB Output is correct
65 Correct 1036 ms 33728 KB Output is correct
66 Correct 1036 ms 33872 KB Output is correct
67 Correct 1046 ms 33768 KB Output is correct
68 Correct 1052 ms 33752 KB Output is correct
69 Correct 1041 ms 33744 KB Output is correct
70 Correct 1050 ms 33744 KB Output is correct
71 Correct 1046 ms 33748 KB Output is correct
72 Correct 1055 ms 33740 KB Output is correct
73 Correct 1044 ms 33748 KB Output is correct
74 Correct 1037 ms 33728 KB Output is correct

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 816 KB Output isn't correct
2 Halted 0 ms 0 KB -