oj.uz

Submission #229415

# Submission time Handle Problem Language Result Execution time Memory
229415 2020-05-04T12:19:19 Z fedoseevtimofey Bulldozer (JOI17_bulldozer) C++14
55 / 100
 1099 ms 33888 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;	
  point lst; bool fnd = false;
  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]);	
    if (fnd == false || lst < d.first) ans = max(ans, t[1].best);	
    fnd = true;
    lst = d.first;
  }	
 	
  cout << ans << '\n';	
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 768 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 768 KB Output is correct
4 Correct 7 ms 768 KB Output is correct
5 Correct 7 ms 816 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 7 ms 816 KB Output is correct
10 Correct 7 ms 768 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 Incorrect 5 ms 640 KB Output isn't correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 768 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 768 KB Output is correct
4 Correct 7 ms 768 KB Output is correct
5 Correct 7 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 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 788 KB Output is correct
25 Correct 7 ms 816 KB Output is correct
26 Correct 7 ms 768 KB Output is correct
27 Correct 7 ms 816 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 768 KB Output is correct
30 Correct 7 ms 768 KB Output is correct
31 Correct 7 ms 896 KB Output is correct
32 Correct 7 ms 896 KB Output is correct

Subtask #3
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 768 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 768 KB Output is correct
4 Correct 7 ms 768 KB Output is correct
5 Correct 7 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 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 788 KB Output is correct
25 Correct 7 ms 816 KB Output is correct
26 Correct 7 ms 768 KB Output is correct
27 Correct 7 ms 816 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 768 KB Output is correct
30 Correct 7 ms 768 KB Output is correct
31 Correct 7 ms 896 KB Output is correct
32 Correct 7 ms 896 KB Output is correct
33 Correct 1070 ms 33744 KB Output is correct
34 Correct 1052 ms 33748 KB Output is correct
35 Correct 1063 ms 33744 KB Output is correct
36 Correct 1058 ms 33744 KB Output is correct
37 Correct 1074 ms 33768 KB Output is correct
38 Correct 1045 ms 33768 KB Output is correct
39 Correct 1074 ms 33744 KB Output is correct
40 Correct 1051 ms 33744 KB Output is correct
41 Correct 1068 ms 33768 KB Output is correct
42 Correct 1050 ms 33756 KB Output is correct
43 Correct 1061 ms 33788 KB Output is correct
44 Correct 1056 ms 33748 KB Output is correct
45 Correct 1060 ms 33748 KB Output is correct
46 Correct 1085 ms 33768 KB Output is correct
47 Correct 1072 ms 33792 KB Output is correct
48 Correct 1046 ms 33744 KB Output is correct
49 Correct 1067 ms 33760 KB Output is correct
50 Correct 1075 ms 33744 KB Output is correct
51 Correct 1073 ms 33880 KB Output is correct
52 Correct 1099 ms 33888 KB Output is correct
53 Correct 1082 ms 33848 KB Output is correct
54 Correct 1063 ms 33872 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 768 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 768 KB Output is correct
4 Correct 7 ms 768 KB Output is correct
5 Correct 7 ms 768 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 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 788 KB Output is correct
25 Correct 7 ms 816 KB Output is correct
26 Correct 7 ms 768 KB Output is correct
27 Correct 7 ms 816 KB Output is correct
28 Correct 7 ms 768 KB Output is correct
29 Correct 7 ms 768 KB Output is correct
30 Correct 7 ms 768 KB Output is correct
31 Correct 7 ms 896 KB Output is correct
32 Correct 7 ms 896 KB Output is correct
33 Correct 1070 ms 33744 KB Output is correct
34 Correct 1052 ms 33748 KB Output is correct
35 Correct 1063 ms 33744 KB Output is correct
36 Correct 1058 ms 33744 KB Output is correct
37 Correct 1074 ms 33768 KB Output is correct
38 Correct 1045 ms 33768 KB Output is correct
39 Correct 1074 ms 33744 KB Output is correct
40 Correct 1051 ms 33744 KB Output is correct
41 Correct 1068 ms 33768 KB Output is correct
42 Correct 1050 ms 33756 KB Output is correct
43 Correct 1061 ms 33788 KB Output is correct
44 Correct 1056 ms 33748 KB Output is correct
45 Correct 1060 ms 33748 KB Output is correct
46 Correct 1085 ms 33768 KB Output is correct
47 Correct 1072 ms 33792 KB Output is correct
48 Correct 1046 ms 33744 KB Output is correct
49 Correct 1067 ms 33760 KB Output is correct
50 Correct 1075 ms 33744 KB Output is correct
51 Correct 1073 ms 33880 KB Output is correct
52 Correct 1099 ms 33888 KB Output is correct
53 Correct 1082 ms 33848 KB Output is correct
54 Correct 1063 ms 33872 KB Output is correct
55 Correct 1077 ms 33872 KB Output is correct
56 Correct 1061 ms 33872 KB Output is correct
57 Correct 1082 ms 33756 KB Output is correct
58 Correct 1054 ms 33752 KB Output is correct
59 Correct 1054 ms 33744 KB Output is correct
60 Correct 1076 ms 33768 KB Output is correct
61 Correct 1059 ms 33744 KB Output is correct
62 Correct 1080 ms 33752 KB Output is correct
63 Correct 1062 ms 33856 KB Output is correct
64 Correct 1085 ms 33756 KB Output is correct
65 Incorrect 1071 ms 33744 KB Output isn't correct
66 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 768 KB Output is correct
2 Correct 7 ms 768 KB Output is correct
3 Correct 7 ms 768 KB Output is correct
4 Correct 7 ms 768 KB Output is correct
5 Correct 7 ms 816 KB Output is correct
6 Correct 7 ms 768 KB Output is correct
7 Correct 6 ms 768 KB Output is correct
8 Correct 7 ms 768 KB Output is correct
9 Correct 7 ms 816 KB Output is correct
10 Correct 7 ms 768 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 Incorrect 5 ms 640 KB Output isn't correct