oj.uz

답안 #338619

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
338619 2020-12-23T14:00:05 Z theshadow_04 Bulldozer (JOI17_bulldozer) C++14
5 / 100
 47 ms 492 KB 
// V T An
#include <bits/stdc++.h>
#define Task "BULLDOZER"
#define F first
#define S second

using namespace std;

const int maxn = 2005;

int n;
struct data {
    long long x, y, w;

    bool operator < (const data A) {
        return x < A.x;
    }
} point[maxn];

namespace Sub1 {

    long long s[maxn], ans = 0;

    void Solve() {
        sort(point + 1, point + n + 1);
        for(int i = 1; i <= n; ++ i) {
            s[i] = s[i - 1] + point[i].w;
        }
        for(int i = 1; i <= n; ++ i) {
            for(int j = i; j <= n; ++ j) {
                ans = max(ans, s[j] - s[i - 1]);
            }
        }
        cout << ans << "\n";
    }
}

namespace Sub2 {

    long long A, B, C;
    int cnt = 0;
    long long cur[maxn];
    data Save[maxn];

    long long DistoLine(long long a, long long b, long long c, long long x, long long y) {
        return a * x + b * y + c;
    }

    bool comp(data p, data q) {
        return DistoLine(A, B, C, p.x, p.y) < DistoLine(A, B, C, q.x, q.y);
    }

    void Solve() {
        long long ans = 0;
        for(int i = 1; i <= n; ++ i) Save[i] = point[i];
        for(int i = 1; i <= n; ++ i) {
            pair<long long, long long> c = {point[i].x, point[i].y};
            ans = max(ans, point[i].w);
            for(int j = i; j <= n; ++ j) {
                pair<long long, long long> d = {point[j].x, point[j].y};
                pair<long long, long long> u = {d.F - c.F, d.S - c.S};
                A = u.S, B = -u.F, C = - (A * c.F + B * c.S);
                cnt = 0;
                sort(point + 1, point + n + 1, comp);
                for(int k = 1; k <= n; ++ k) {
                    if(k > 1 && DistoLine(A, B, C, point[k].x, point[k].y) == DistoLine(A, B, C, point[k - 1].x, point[k - 1].y)){
                        cur[cnt] += point[k].w;
                    } else cur[++ cnt] = point[k].w;
                }
                long long res = 0;
                for(int k = 1; k <= cnt; ++ k) {
                    res += cur[k];
                    ans = max(ans, res);
                    if(res < 0) res = 0;
                }
                for(int k = 1; k <= n; ++ k) point[k] = Save[k], cur[k] = 0;
            }
        }
        cout << ans;
    }
}

int main() {
    ios_base::sync_with_stdio(0);
    cout.tie(0); cin.tie(0);
	if(fopen(Task".inp", "r")){
		freopen(Task".inp", "r", stdin);
		freopen(Task".out", "w", stdout);
	}
    cin >> n;
    int sub1 = 1;
    for(int i = 1; i <= n; ++ i) {
        int x, y, w;
        cin >> x >> y >> w;
        point[i] = {x, y, w};
        if(y) sub1 = 0;
    }
    if(sub1) {
        Sub1::Solve();
        return 0;
    }
    Sub2::Solve();
}

// CHY-AKAV

Compilation message

bulldozer.cpp: In function 'int main()':
bulldozer.cpp:87:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   87 |   freopen(Task".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bulldozer.cpp:88:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   88 |   freopen(Task".out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 364 KB Output is correct

Subtask #2
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 492 KB Output is correct
2 Correct 43 ms 364 KB Output is correct
3 Correct 41 ms 364 KB Output is correct
4 Correct 42 ms 492 KB Output is correct
5 Correct 42 ms 364 KB Output is correct
6 Correct 42 ms 364 KB Output is correct
7 Correct 41 ms 364 KB Output is correct
8 Correct 42 ms 492 KB Output is correct
9 Correct 41 ms 376 KB Output is correct
10 Correct 41 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 47 ms 492 KB Output is correct
22 Correct 40 ms 492 KB Output is correct
23 Correct 40 ms 364 KB Output is correct
24 Correct 39 ms 364 KB Output is correct
25 Incorrect 39 ms 364 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #3
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 492 KB Output is correct
2 Correct 43 ms 364 KB Output is correct
3 Correct 41 ms 364 KB Output is correct
4 Correct 42 ms 492 KB Output is correct
5 Correct 42 ms 364 KB Output is correct
6 Correct 42 ms 364 KB Output is correct
7 Correct 41 ms 364 KB Output is correct
8 Correct 42 ms 492 KB Output is correct
9 Correct 41 ms 376 KB Output is correct
10 Correct 41 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 47 ms 492 KB Output is correct
22 Correct 40 ms 492 KB Output is correct
23 Correct 40 ms 364 KB Output is correct
24 Correct 39 ms 364 KB Output is correct
25 Incorrect 39 ms 364 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 42 ms 492 KB Output is correct
2 Correct 43 ms 364 KB Output is correct
3 Correct 41 ms 364 KB Output is correct
4 Correct 42 ms 492 KB Output is correct
5 Correct 42 ms 364 KB Output is correct
6 Correct 42 ms 364 KB Output is correct
7 Correct 41 ms 364 KB Output is correct
8 Correct 42 ms 492 KB Output is correct
9 Correct 41 ms 376 KB Output is correct
10 Correct 41 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 384 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 1 ms 364 KB Output is correct
17 Correct 1 ms 364 KB Output is correct
18 Correct 1 ms 364 KB Output is correct
19 Correct 1 ms 364 KB Output is correct
20 Correct 1 ms 364 KB Output is correct
21 Correct 47 ms 492 KB Output is correct
22 Correct 40 ms 492 KB Output is correct
23 Correct 40 ms 364 KB Output is correct
24 Correct 39 ms 364 KB Output is correct
25 Incorrect 39 ms 364 KB Output isn't correct
26 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 1 ms 364 KB Output is correct
13 Correct 1 ms 364 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 42 ms 492 KB Output is correct
17 Correct 43 ms 364 KB Output is correct
18 Correct 41 ms 364 KB Output is correct
19 Correct 42 ms 492 KB Output is correct
20 Correct 42 ms 364 KB Output is correct
21 Correct 42 ms 364 KB Output is correct
22 Correct 41 ms 364 KB Output is correct
23 Correct 42 ms 492 KB Output is correct
24 Correct 41 ms 376 KB Output is correct
25 Correct 41 ms 364 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Correct 1 ms 364 KB Output is correct
30 Correct 1 ms 364 KB Output is correct
31 Correct 1 ms 364 KB Output is correct
32 Correct 1 ms 364 KB Output is correct
33 Correct 1 ms 364 KB Output is correct
34 Correct 1 ms 364 KB Output is correct
35 Correct 1 ms 364 KB Output is correct
36 Correct 47 ms 492 KB Output is correct
37 Correct 40 ms 492 KB Output is correct
38 Correct 40 ms 364 KB Output is correct
39 Correct 39 ms 364 KB Output is correct
40 Incorrect 39 ms 364 KB Output isn't correct
41 Halted 0 ms 0 KB -