oj.uz

Submission #1077807

# Submission time Handle Problem Language Result Execution time Memory
1077807 2024-08-27T09:17:05 Z danikoynov Bulldozer (JOI17_bulldozer) C++14
20 / 100
 2000 ms 856 KB 
#include<bits/stdc++.h>
#define endl '\n'
    
using namespace std;
typedef long long ll;
    
struct Point
{
    ll x, y;
    
    Point(ll _x = 0, ll _y = 0)
    {
        x = _x;
        y = _y;
    }
    
    void input()
    {
        cin >> x >> y;
    }
};
    
const int MAXN = 2010;
int n;
pair < Point, ll > spot[MAXN];
void input()
{
    cin >> n;
    for (int i = 1; i <= n; i ++)
    {
        spot[i].first.input();
        cin >> spot[i].second;
    }
}
    
ll signed_area(Point A, Point B, Point C) /// returns signed area * 2
{
    ll area = (B.x - A.x) * (A.y + B.y) +
                (C.x - B.x) * (B.y + C.y) +
                    (A.x - C.x) * (C.y + A.y);
    return area;
}
    
int orient(Point A, Point B, Point C)
{
    
    ll area = signed_area(A, B, C);
    
    if (area > 0)
        return 1;
    if (area < 0)
        return -1;
    assert(area != 0);
    return 0;
}
    
void simulate()
{
    
    bool all_x = true;
    for (int i = 1; i <= n; i ++)
        if (spot[i].first.y != 0)
            all_x = false;
    ll result = 0;
    if (all_x)
    {
        for (int i = 1; i <= n; i ++)
            if (spot[i].second > 0)
                result += spot[i].second;
        cout << result << endl;
        return;
    }

    if (n == 1)
    {
        result = max(result, spot[1].second);
    }
    if (n == 2)
    {
        result = max(result, spot[1].second);
        result = max(result, spot[2].second);
        result = max(result, spot[1].second + spot[2].second);
    }
    for (int i = 1; i <= n; i ++)
        for (int j = i + 1; j <= n; j ++)
        {
            vector < pair < ll, ll > > pos, neg;
            for (int k = 1; k <= n; k ++)
            {
                if (k == i || k == j)
                    continue;
                ll area = signed_area(spot[i].first, 
                                        spot[j].first, 
                                        spot[k].first);
                /**if (i == 3 && j == 4)
                {
                    cout << "pair with " << k << " area " << area << " value " << spot[k].second << endl;
                }*/
                assert(area != 0);
                if (area > 0)
                    pos.push_back({area, spot[k].second});
                else
                    neg.push_back({-area, spot[k].second});
                
            }
    
            sort(pos.begin(), pos.end());
            sort(neg.begin(), neg.end());
    
            ll best = 0, sum = 0;
            ll ls = -1;
            for (pair < ll, ll > cur : pos)
            {
                sum += cur.second;
                assert(cur.first != ls);
                ls = cur.first;
                best = max(best, sum);
            }
            ls = -1;
            sum = 0;
            for (pair < ll, ll > cur : neg)
            {
                sum += cur.second;
                assert(cur.first != ls);
                ls = cur.first;
                best = max(best, sum);
            }

            //cout << "HERE " << best << endl;
            best = best + spot[i].second;
            best = best + spot[j].second;
            //cout << "new best " << best << endl;
            //ll mx = min(spot[i].second, spot[j].second);
            //cout << "mx " << mx << endl;
            if (spot[i].second < 0)
                best -= spot[i].second;
            if (spot[j].second < 0)
                best -= spot[j].second;
            //cout << "pair " << i << " " << j << " " << best << endl;
            result = max(result, best);
    
        }
    
    cout << result << endl;
}
void solve()
{
    input();
    simulate();
}
int main()
{
    solve();
    return 0;
}
/*
3
0 0 1
1 0 1
2 0 1
*/

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 348 KB Output is correct
2 Correct 17 ms 488 KB Output is correct
3 Correct 17 ms 488 KB Output is correct
4 Correct 17 ms 492 KB Output is correct
5 Correct 17 ms 496 KB Output is correct
6 Correct 17 ms 348 KB Output is correct
7 Correct 17 ms 600 KB Output is correct
8 Correct 18 ms 492 KB Output is correct
9 Correct 17 ms 348 KB Output is correct
10 Correct 17 ms 496 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 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 23 ms 492 KB Output is correct
22 Correct 18 ms 348 KB Output is correct
23 Correct 16 ms 348 KB Output is correct
24 Correct 16 ms 344 KB Output is correct
25 Correct 17 ms 348 KB Output is correct
26 Correct 16 ms 484 KB Output is correct
27 Correct 16 ms 348 KB Output is correct
28 Correct 16 ms 348 KB Output is correct
29 Correct 16 ms 492 KB Output is correct
30 Correct 17 ms 344 KB Output is correct
31 Correct 16 ms 492 KB Output is correct
32 Correct 17 ms 488 KB Output is correct

Subtask #3
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 348 KB Output is correct
2 Correct 17 ms 488 KB Output is correct
3 Correct 17 ms 488 KB Output is correct
4 Correct 17 ms 492 KB Output is correct
5 Correct 17 ms 496 KB Output is correct
6 Correct 17 ms 348 KB Output is correct
7 Correct 17 ms 600 KB Output is correct
8 Correct 18 ms 492 KB Output is correct
9 Correct 17 ms 348 KB Output is correct
10 Correct 17 ms 496 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 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 23 ms 492 KB Output is correct
22 Correct 18 ms 348 KB Output is correct
23 Correct 16 ms 348 KB Output is correct
24 Correct 16 ms 344 KB Output is correct
25 Correct 17 ms 348 KB Output is correct
26 Correct 16 ms 484 KB Output is correct
27 Correct 16 ms 348 KB Output is correct
28 Correct 16 ms 348 KB Output is correct
29 Correct 16 ms 492 KB Output is correct
30 Correct 17 ms 344 KB Output is correct
31 Correct 16 ms 492 KB Output is correct
32 Correct 17 ms 488 KB Output is correct
33 Execution timed out 2036 ms 856 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 348 KB Output is correct
2 Correct 17 ms 488 KB Output is correct
3 Correct 17 ms 488 KB Output is correct
4 Correct 17 ms 492 KB Output is correct
5 Correct 17 ms 496 KB Output is correct
6 Correct 17 ms 348 KB Output is correct
7 Correct 17 ms 600 KB Output is correct
8 Correct 18 ms 492 KB Output is correct
9 Correct 17 ms 348 KB Output is correct
10 Correct 17 ms 496 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 1 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 23 ms 492 KB Output is correct
22 Correct 18 ms 348 KB Output is correct
23 Correct 16 ms 348 KB Output is correct
24 Correct 16 ms 344 KB Output is correct
25 Correct 17 ms 348 KB Output is correct
26 Correct 16 ms 484 KB Output is correct
27 Correct 16 ms 348 KB Output is correct
28 Correct 16 ms 348 KB Output is correct
29 Correct 16 ms 492 KB Output is correct
30 Correct 17 ms 344 KB Output is correct
31 Correct 16 ms 492 KB Output is correct
32 Correct 17 ms 488 KB Output is correct
33 Execution timed out 2036 ms 856 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -