oj.uz

답안 #338514

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
338514 2020-12-23T10:04:27 Z theshadow_04 Bulldozer (JOI17_bulldozer) C++14
5 / 100
 514 ms 492 KB 
// V T An
#include <bits/stdc++.h>
#define Task "BULLDOZER"
#define F first
#define S second
#define int long long

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

    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].x);
            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};
                long long A = u.S, B = -u.F, C1 = - (A * c.F + B * c.S);
                for(int k = 1; k <= n; ++ k) if(k != j && k != i) {
                    long long C2 = - (A * point[k].x + B * point[k].y);
                    long long Dis = DistoLine(A, B, C1, point[k].x, point[k].y);
                    long long res = 0;
                    for(int p = 1; p <= n; ++ p) {
                        long long Dis1 = DistoLine(A, B, C1, point[p].x, point[p].y);
                        long long Dis2 = DistoLine(A, B, C2, point[p].x, point[p].y);
                        if(Dis == Dis1 + Dis2) res += point[p].w;
                    }
                    ans = max(ans, res);
                    res = 0;
                    for(int p = 1; p <= n; ++ p) {
                        long long Dis1 = DistoLine(A, B, C1, point[p].x, point[p].y);
                        long long Dis2 = DistoLine(A, B, C2, point[p].x, point[p].y);
                        if(Dis1 && Dis == Dis1 + Dis2) res += point[p].w;
                    }
                    ans = max(ans, res);
                }
            }
        }
        cout << ans;
    }
}

signed 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 467 ms 364 KB Output is correct
2 Correct 469 ms 492 KB Output is correct
3 Correct 474 ms 364 KB Output is correct
4 Correct 466 ms 364 KB Output is correct
5 Correct 473 ms 364 KB Output is correct
6 Correct 514 ms 364 KB Output is correct
7 Correct 467 ms 492 KB Output is correct
8 Incorrect 470 ms 492 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
0 / 35.0

# 결과 실행 시간 메모리 Grader output
1 Correct 467 ms 364 KB Output is correct
2 Correct 469 ms 492 KB Output is correct
3 Correct 474 ms 364 KB Output is correct
4 Correct 466 ms 364 KB Output is correct
5 Correct 473 ms 364 KB Output is correct
6 Correct 514 ms 364 KB Output is correct
7 Correct 467 ms 492 KB Output is correct
8 Incorrect 470 ms 492 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 467 ms 364 KB Output is correct
2 Correct 469 ms 492 KB Output is correct
3 Correct 474 ms 364 KB Output is correct
4 Correct 466 ms 364 KB Output is correct
5 Correct 473 ms 364 KB Output is correct
6 Correct 514 ms 364 KB Output is correct
7 Correct 467 ms 492 KB Output is correct
8 Incorrect 470 ms 492 KB Output isn't correct
9 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 467 ms 364 KB Output is correct
17 Correct 469 ms 492 KB Output is correct
18 Correct 474 ms 364 KB Output is correct
19 Correct 466 ms 364 KB Output is correct
20 Correct 473 ms 364 KB Output is correct
21 Correct 514 ms 364 KB Output is correct
22 Correct 467 ms 492 KB Output is correct
23 Incorrect 470 ms 492 KB Output isn't correct
24 Halted 0 ms 0 KB -