oj.uz

Submission #648444

# Submission time Handle Problem Language Result Execution time Memory
648444 2022-10-06T13:45:47 Z 406 Hamburg Steak (JOI20_hamburg) C++17
15 / 100
 367 ms 8236 KB 
#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

const int N = 2e5 + 50;
const int M = 2 * N + 5;
int l[N], r[N], u[N], d[N], n, k;
bitset<N> used, full;
vector<pair<int, int>> points;
vector<int> X, Y;
int cl[M], op[M], cnt;

void rec();

inline bool inter(int i, int x, int y) {
        return l[i] <= x && x <= r[i] && d[i] <= y && y <= u[i];
}

inline void add_point(int x, int y) {
        vector<int> change;
        for (int i = used._Find_first(); i < n; i = used._Find_next(i)) {
                if (inter(i, x, y)) {
                        cnt--;
                        used[i] = false;
                        change.push_back(i);
                }
        }
        if (change.empty())
                return;
        points.emplace_back(x, y);

        rec();

        for (auto cc: change) used[cc] = true, cnt++;
        points.pop_back();

}

void rec() {
        if (!cnt && points.size() <= k) {
                for (int i = 0; i < (int) points.size(); i++)
                        cout << X[points[i].first] << ' ' << Y[points[i].second] << '\n';
                for (int i = points.size(); i < k; i++)
                        cout << 1 << ' ' << 1 << '\n';
                exit(0);
        }
        if (points.size() >= k)
                return;

        int minR = 2 * n;
        int minU = 2 * n;
        int maxD = 0;
        int maxL = 0;

        for (int i = used._Find_first(); i < n; i = used._Find_next(i)) {
                minR = min(minR, r[i]);
                maxL = max(maxL, l[i]);

                minU = min(minU, u[i]);
                maxD = max(maxD, d[i]);
        }

        if (maxL <= minR || maxD <= minU) {
                add_point(minR, minU);
        }
        else {
                add_point(minR, minU);
                add_point(minR, maxD);
                add_point(maxL, minU);
                add_point(maxL, maxD);
                if (points.size())
                        return;

                int mxD = 0;
                int mnU = 2 * n;
                for (int i = 0; i < n; i++) if (l[i] <= minR) {
                        mxD = max(mxD, d[i]);
                        mnU = min(mnU, u[i]);
                }
                add_point(minR, mxD);
                add_point(minR, mnU);
                mxD = 0;
                mnU = 2 * n;
                for (int i = 0; i < n; i++) if (r[i] >= maxL) {
                        mxD = max(mxD, d[i]);
                        mnU = min(mnU, u[i]);
                }

                add_point(maxL, mxD);
                add_point(maxL, mnU);

                int mxL = 0;
                int mnR = 2 * n;

                for (int i = 0; i < n; i++) if (u[i] >= maxD) {
                        mxL = max(mxL, l[i]);
                        mnR = min(mnR, r[i]);
                }
                add_point(mxL, maxD);
                add_point(mnR, maxD);

                mxL = 0;
                mnR = 2 * n;

                for (int i = 0; i < n; i++) if (d[i] <= minU) {
                        mxL = max(mxL, l[i]);
                        mnR = min(mnR, r[i]);
                }

                add_point(mxL, minU);
                add_point(mnR, minU);

                for (int i = 0; i < n; i++) if (l[i] <= minR)
                        op[d[i]]++, cl[u[i]]++;

                vector<int> p{-2};
                for (int h = 0; h < Y.size(); h++) {
                        if (p.back() == (h - 1))
                                p.back()++;
                        else if (op[h])
                                p.push_back(h);
                        if (cl[h])
                                p.push_back(-1);
                }
                random_shuffle(p.begin(), p.end());

                for (auto h: p) if (h < 0)
                        add_point(minR, h);
        }
}

signed main() {
        ios::sync_with_stdio(0);
        cin.tie(0);

        cin >> n >> k;
        X.reserve(2 * n), Y.reserve(2 * n);
        for (int i = 0; i < n; i++) {
                cin >> l[i] >> d[i] >> r[i] >> u[i];
                X.push_back(l[i]);
                X.push_back(r[i]);
                Y.push_back(d[i]);
                Y.push_back(u[i]);
        }
        sort(X.begin(), X.end());
        X.resize(unique(X.begin(), X.end()) - X.begin());

        sort(Y.begin(), Y.end());
        Y.resize(unique(Y.begin(), Y.end()) - Y.begin());

        for (int i = 0; i < n; i++) {
                l[i] = lower_bound(X.begin(), X.end(), l[i]) - X.begin();
                r[i] = lower_bound(X.begin(), X.end(), r[i]) - X.begin();

                u[i] = lower_bound(Y.begin(), Y.end(), u[i]) - Y.begin();
                d[i] = lower_bound(Y.begin(), Y.end(), d[i]) - Y.begin();
        }

        for (int i = 0; i < n; i++)
                used[i] = true;
        cnt = n;

        rec();
        cout << "NO I DID NOT FIND ANYTHING\n";
        return 0;
}

Compilation message

hamburg.cpp: In function 'void rec()':
hamburg.cpp:42:35: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |         if (!cnt && points.size() <= k) {
      |                     ~~~~~~~~~~~~~~^~~~
hamburg.cpp:49:27: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   49 |         if (points.size() >= k)
      |             ~~~~~~~~~~~~~~^~~~
hamburg.cpp:119:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |                 for (int h = 0; h < Y.size(); h++) {
      |                                 ~~^~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct

Subtask #2
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct

Subtask #3
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2 ms 420 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 4 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct

Subtask #4
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 5 ms 340 KB Output is correct
14 Incorrect 34 ms 468 KB Expected integer, but "NO" found
15 Halted 0 ms 0 KB -

Subtask #5
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 259 ms 7756 KB Output is correct
6 Correct 260 ms 7756 KB Output is correct
7 Correct 260 ms 7756 KB Output is correct
8 Correct 279 ms 7796 KB Output is correct

Subtask #6
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 3 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 282 ms 7756 KB Output is correct
6 Correct 282 ms 8236 KB Output is correct
7 Correct 273 ms 7756 KB Output is correct
8 Correct 294 ms 7916 KB Output is correct

Subtask #7
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 2 ms 420 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 4 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 2 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 294 ms 7792 KB Output is correct
14 Correct 257 ms 7500 KB Output is correct
15 Correct 260 ms 7856 KB Output is correct
16 Correct 267 ms 7700 KB Output is correct
17 Correct 266 ms 7688 KB Output is correct
18 Correct 262 ms 7768 KB Output is correct
19 Correct 266 ms 7652 KB Output is correct
20 Correct 286 ms 7544 KB Output is correct
21 Correct 367 ms 7928 KB Output is correct
22 Correct 296 ms 7664 KB Output is correct
23 Correct 292 ms 7784 KB Output is correct
24 Correct 295 ms 7864 KB Output is correct

Subtask #8
0 / 79.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 340 KB Output is correct
4 Correct 2 ms 340 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 2 ms 340 KB Output is correct
9 Correct 2 ms 340 KB Output is correct
10 Correct 3 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 5 ms 340 KB Output is correct
14 Incorrect 34 ms 468 KB Expected integer, but "NO" found
15 Halted 0 ms 0 KB -