oj.uz

답안 #338573

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
338573 2020-12-23T12:51:21 Z theshadow_04 Bulldozer (JOI17_bulldozer) C++14
5 / 100
 65 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];

    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) {
            pair<long long, long long> c = {point[i].x, point[i].y};
            ans = max(ans, point[i].w);
            for(int j = i + 1; 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 && 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;
                }
                for(int k = 1; k <= cnt; ++ k) cur[k] += cur[k - 1];
                for(int p = 1; p <= cnt; ++ p)
                    for(int q = p; q <= cnt; ++ q)
                        ans = max(ans, cur[q] - cur[p - 1]);
            }
        }
        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:82:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   82 |   freopen(Task".inp", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
bulldozer.cpp:83:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   83 |   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 364 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 364 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 64 ms 492 KB Output is correct
2 Correct 62 ms 364 KB Output is correct
3 Correct 62 ms 492 KB Output is correct
4 Correct 61 ms 364 KB Output is correct
5 Correct 61 ms 364 KB Output is correct
6 Correct 63 ms 364 KB Output is correct
7 Correct 62 ms 364 KB Output is correct
8 Correct 62 ms 364 KB Output is correct
9 Correct 60 ms 364 KB Output is correct
10 Correct 65 ms 492 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 Incorrect 1 ms 364 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #3
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 64 ms 492 KB Output is correct
2 Correct 62 ms 364 KB Output is correct
3 Correct 62 ms 492 KB Output is correct
4 Correct 61 ms 364 KB Output is correct
5 Correct 61 ms 364 KB Output is correct
6 Correct 63 ms 364 KB Output is correct
7 Correct 62 ms 364 KB Output is correct
8 Correct 62 ms 364 KB Output is correct
9 Correct 60 ms 364 KB Output is correct
10 Correct 65 ms 492 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 Incorrect 1 ms 364 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 64 ms 492 KB Output is correct
2 Correct 62 ms 364 KB Output is correct
3 Correct 62 ms 492 KB Output is correct
4 Correct 61 ms 364 KB Output is correct
5 Correct 61 ms 364 KB Output is correct
6 Correct 63 ms 364 KB Output is correct
7 Correct 62 ms 364 KB Output is correct
8 Correct 62 ms 364 KB Output is correct
9 Correct 60 ms 364 KB Output is correct
10 Correct 65 ms 492 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 Incorrect 1 ms 364 KB Output isn't correct
15 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 364 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 364 KB Output is correct
15 Correct 1 ms 364 KB Output is correct
16 Correct 64 ms 492 KB Output is correct
17 Correct 62 ms 364 KB Output is correct
18 Correct 62 ms 492 KB Output is correct
19 Correct 61 ms 364 KB Output is correct
20 Correct 61 ms 364 KB Output is correct
21 Correct 63 ms 364 KB Output is correct
22 Correct 62 ms 364 KB Output is correct
23 Correct 62 ms 364 KB Output is correct
24 Correct 60 ms 364 KB Output is correct
25 Correct 65 ms 492 KB Output is correct
26 Correct 1 ms 364 KB Output is correct
27 Correct 1 ms 364 KB Output is correct
28 Correct 1 ms 364 KB Output is correct
29 Incorrect 1 ms 364 KB Output isn't correct
30 Halted 0 ms 0 KB -