oj.uz

답안 #419319

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
419319 2021-06-06T22:28:13 Z 2qbingxuan Cultivation (JOI17_cultivation) C++17
15 / 100
 2000 ms 892 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#ifdef local
#define safe cerr<<__PRETTY_FUNCTION__<<" line "<<__LINE__<<" safe\n"
#define pary(a...) danb(#a, a)
#define debug(a...) qqbx(#a, a)
template <typename ...T> void qqbx(const char *s, T ...a) {
    int cnt = sizeof...(T);
    ((std::cerr << "\033[1;32m(" << s << ") = (") , ... , (std::cerr << a << (--cnt ? ", " : ")\033[0m\n")));
}
template <typename T> void danb(const char *s, T L, T R) {
    std::cerr << "\033[1;32m[ " << s << " ] = [ ";
    for (int f = 0; L != R; ++L)
        std::cerr << (f++ ? ", " : "") << *L;
    std::cerr << " ]\033[0m\n";
}
#else
#define debug(...) ((void)0)
#define safe ((void)0)
#define pary(...) ((void)0)
#endif // local
#define all(v) begin(v),end(v)
#define pb emplace_back
#define get_pos(u,x) int(lower_bound(all(u),x)-begin(u))

using namespace std;
using ll = int_fast64_t;
using ld = long double;
template <typename T> using min_heap = priority_queue<T, vector<T>, greater<T>>;
const int mod = 1000000007;
const int inf = 1e9;
const ll INF = 1e18;
const int maxn = 5025;
template <typename T> void sort_uni(T &v) { sort(all(v)), v.erase(unique(all(v)), v.end()); }

int calc(int R, int C, vector<pair<int,int>> pts) {
    int N = pts.size();
    auto solve = [&]() {
        sort(all(pts));

        vector<int> dx{0};
        for (int i = 0; i < N; i++) {
            for (int j = 0; j < i; j++) {
                dx.emplace_back(pts[i].first - pts[j].first - 1);
            }
            dx.emplace_back(pts[i].first - 1);
            dx.emplace_back(R - pts[i].first);
        }
        sort_uni(dx);

        int mina = pts[0].first - 1;
        int minb = R - pts[N-1].first;
        int minsum = 0;
        for (int i = 1; i < N; i++) minsum = max(minsum, pts[i].first - pts[i-1].first - 1);

        int res = 2e9;
        for (int a: dx) {
            if (a < mina) continue;
            for (int b: dx) {
                if (b < minb) continue;
                if (a + b < minsum) continue;
                vector<pair<int,int>> evt;
                for (auto [x, y]: pts) evt.emplace_back(x-a, y);
                for (auto [x, y]: pts) evt.emplace_back(x+b+1, -y);
                inplace_merge(evt.begin(), evt.begin() + N, evt.end());

                multiset<int> posy;
                multiset<int> diff;

                auto add = [&](int val) {
                    auto it = posy.insert(val);
                    if (it != posy.begin() && next(it) != posy.end())
                        diff.erase(diff.find(*next(it) - *prev(it)));
                    if (it != posy.begin())
                        diff.insert(val - *prev(it));
                    if (next(it) != posy.end())
                        diff.insert(*next(it) - val);
                };
                auto remove = [&](int val) {
                    auto it = posy.find(val);
                    if (it != posy.begin())
                        diff.erase(diff.find(val - *prev(it)));
                    if (next(it) != posy.end())
                        diff.erase(diff.find(*next(it) - val));
                    if (it != posy.begin() && next(it) != posy.end())
                        diff.insert(*next(it) - *prev(it));
                    posy.erase(it);
                };
                int ans = 0, minc = 0, mind = 0;
                for (int i = 0, j = 0; i < N*2; i = j) {
                    for (j = i; j < N*2; j++) {
                        if (evt[j].first != evt[i].first) break;
                        int y = evt[j].second;
                        if (y < 0) {
                            remove(-y);
                        } else {
                            add(y);
                        }
                    }
                    if (j == N*2) continue;
                    int l = evt[i].first;
                    int r = evt[j].first;
                    if (r <= 1 || l > R) continue;
                    assert (posy.size() > 0);
                    minc = max(minc, *posy.begin() - 1);
                    mind = max(mind, C - *prev(posy.end()));
                    if (diff.size())
                        ans = max(ans, *prev(diff.end()) - 1);
                }
                ans = max(ans, minc + mind);
                debug(a, b, ans);
                debug(minc, mind);
                res = min<ll>(res, 0LL + a + b + ans);
            }
        }
        return res;
    };
    int res = solve();
    for (auto &[x, y]: pts) swap(x, y);
    swap(R, C);
    return min(res, solve());
}

int naive(int R, int C, vector<pair<int,int>> pts) {
    int grid = 0;
    for (auto [x, y]: pts) grid |= 1<<((x-1) * C + (y-1));
    unordered_map<int,int> dis;
    const int U = (1 << (R*C)) - 1;
    queue<int> q;
    dis[grid] = 0;
    q.push(grid);

    int mask1 = 0, mask2 = 0;
    for (int i = 0; i < R; i++) for (int j = 0; j < C; j++) {
        if (j - 1 >= 0)
            mask1 |= 1 << (i * C + j);
        if (j + 1 < C)
            mask2 |= 1 << (i * C + j);
    }
    while (!q.empty()) {
        int cur = q.front(); q.pop();
        if (int nxt = (cur | cur << C) & U; !dis.count(nxt))
            dis[nxt] = dis[cur] + 1, q.push(nxt);

        if (int nxt = (cur | cur >> C); !dis.count(nxt))
            dis[nxt] = dis[cur] + 1, q.push(nxt);

        if (int nxt = cur | ((cur & mask1) >> 1); !dis.count(nxt))
            dis[nxt] = dis[cur] + 1, q.push(nxt);

        if (int nxt = cur | ((cur & mask2) << 1); !dis.count(nxt))
            dis[nxt] = dis[cur] + 1, q.push(nxt);
    }
    return dis[U];
}
void verify() {
    int R, C;
    cin >> R >> C;
    for (int i = 1; i < (1<<(R*C)); i++) {
        vector<pair<int,int>> pts;
        for (int j = 0; j < R*C; j++) if (i >> j & 1) pts.emplace_back(j / C + 1, j % C + 1);
        if (naive(R, C, pts) != calc(R, C, pts)) {
            for (auto [x, y]: pts) cerr<<x<<','<<y<<'\n';
            exit(3);
        }
    }
    exit(0);
}
signed main() {
    ios_base::sync_with_stdio(0), cin.tie(0);
    // verify();

    int R, C, N;
    cin >> R >> C >> N;
    vector<pair<int,int>> pts(N);
    for (auto &[x, y]: pts) cin >> x >> y;
    // cerr << naive(R, C, pts) << '\n';
    cout << calc(R, C, pts) << '\n';
}

/*
4 4 2
1 2
2 1

4 3 2
1 1
1 3
 */

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 4 ms 204 KB Output is correct
18 Correct 50 ms 332 KB Output is correct
19 Correct 28 ms 296 KB Output is correct
20 Correct 8 ms 204 KB Output is correct
21 Correct 61 ms 312 KB Output is correct
22 Correct 254 ms 332 KB Output is correct
23 Correct 25 ms 204 KB Output is correct
24 Correct 468 ms 512 KB Output is correct
25 Correct 328 ms 404 KB Output is correct
26 Correct 707 ms 688 KB Output is correct
27 Correct 708 ms 776 KB Output is correct
28 Correct 446 ms 460 KB Output is correct
29 Correct 631 ms 756 KB Output is correct
30 Correct 701 ms 892 KB Output is correct
31 Correct 709 ms 800 KB Output is correct
32 Correct 709 ms 748 KB Output is correct

Subtask #3
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 4 ms 204 KB Output is correct
18 Correct 50 ms 332 KB Output is correct
19 Correct 28 ms 296 KB Output is correct
20 Correct 8 ms 204 KB Output is correct
21 Correct 61 ms 312 KB Output is correct
22 Correct 254 ms 332 KB Output is correct
23 Correct 25 ms 204 KB Output is correct
24 Correct 468 ms 512 KB Output is correct
25 Correct 328 ms 404 KB Output is correct
26 Correct 707 ms 688 KB Output is correct
27 Correct 708 ms 776 KB Output is correct
28 Correct 446 ms 460 KB Output is correct
29 Correct 631 ms 756 KB Output is correct
30 Correct 701 ms 892 KB Output is correct
31 Correct 709 ms 800 KB Output is correct
32 Correct 709 ms 748 KB Output is correct
33 Execution timed out 2075 ms 668 KB Time limit exceeded
34 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 238 ms 204 KB Output is correct
2 Correct 1486 ms 300 KB Output is correct
3 Correct 1640 ms 304 KB Output is correct
4 Correct 1223 ms 324 KB Output is correct
5 Execution timed out 2011 ms 324 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 238 ms 204 KB Output is correct
2 Correct 1486 ms 300 KB Output is correct
3 Correct 1640 ms 304 KB Output is correct
4 Correct 1223 ms 324 KB Output is correct
5 Execution timed out 2011 ms 324 KB Time limit exceeded
6 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 0 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 4 ms 204 KB Output is correct
18 Correct 50 ms 332 KB Output is correct
19 Correct 28 ms 296 KB Output is correct
20 Correct 8 ms 204 KB Output is correct
21 Correct 61 ms 312 KB Output is correct
22 Correct 254 ms 332 KB Output is correct
23 Correct 25 ms 204 KB Output is correct
24 Correct 468 ms 512 KB Output is correct
25 Correct 328 ms 404 KB Output is correct
26 Correct 707 ms 688 KB Output is correct
27 Correct 708 ms 776 KB Output is correct
28 Correct 446 ms 460 KB Output is correct
29 Correct 631 ms 756 KB Output is correct
30 Correct 701 ms 892 KB Output is correct
31 Correct 709 ms 800 KB Output is correct
32 Correct 709 ms 748 KB Output is correct
33 Execution timed out 2075 ms 668 KB Time limit exceeded
34 Halted 0 ms 0 KB -