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Submission #878074

# Submission time Handle Problem Language Result Execution time Memory
878074 2023-11-24T04:23:22 Z The_Samurai Chessboard (IZhO18_chessboard) C++17
47 / 100
 2000 ms 11856 KB 
#include "bits/stdc++.h"
using namespace std;
using ll = long long;
const ll inf = 1e18;

struct Fenwick {
    vector<int> tree;
    int n;

    void init(int len) {
        n = len;
        tree.assign(n + 1, 0);
    }

    void update(int i, int v) {
        i++;
        while (i <= n) {
            tree[i] += v;
            i += i & (-i);
        }
    }

    int get(int i) {
        i++;
        int sum = 0;
        while (i > 0) {
            sum += tree[i];
            i -= i & (-i);
        }
        return sum;
    }

    int get(int l, int r) {
        return get(r) - get(l - 1);
    }
};

void solve() {
    int n, k;
    cin >> n >> k;
    vector<vector<pair<int, int>>> in(n + 1), out(n + 1);
    for (int i = 0; i < k; i++) {
        int x1, y1, x2, y2;
        cin >> x1 >> y1 >> x2 >> y2;
        in[x1].emplace_back(y1, y2);
        out[x2].emplace_back(y1, y2);
    }
    vector<int> del;
    for (int i = 1; i * i <= n; i++) {
        if (n % i) continue;
        del.emplace_back(i);
        if (i != 1 and i * i != n) del.emplace_back(n / i);
    }
    ll ans = 1e18;
    for (int p: del) {
        vector<int> b, w;
        for (int i = 1; i <= n; i++) {
            if ((i - 1) / p % 2) w.emplace_back(i);
            else b.emplace_back(i);
        }
        for (int s = 0; s < 2; s++) {
            ll need = 0;
            int bib = 0, biw = 0;
            for (int i = 1; i <= n; i++) {
                for (auto [l, r]: in[i]) {
                    bib += upper_bound(b.begin(), b.end(), r) - lower_bound(b.begin(), b.end(), l);
                    biw += upper_bound(w.begin(), w.end(), r) - lower_bound(w.begin(), w.end(), l);
                }
                int wib = (int) b.size() - bib;
                int wiw = (int) w.size() - biw;

                bool wh = true;
                if ((i - 1) / p % 2 == 0) wh = !wh;
                if (s) wh = !wh;
                need += wh ? biw + wib : bib + wiw;

                for (auto [l, r]: out[i]) {
                    bib -= upper_bound(b.begin(), b.end(), r) - lower_bound(b.begin(), b.end(), l);
                    biw -= upper_bound(w.begin(), w.end(), r) - lower_bound(w.begin(), w.end(), l);
                }
            }
//            cout << p << ' ' << s << ' ' << need << endl;
            ans = min(ans, need);
        }
    }
    cout << ans;

}

int main() {
    cin.tie(0)->sync_with_stdio(false);
#ifdef sunnatov
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif

    int queries = 1;
//    cin >> queries;

    for (int test_case = 1; test_case <= queries; test_case++) {
#ifdef sunnatov
        cout << "Test case: " << test_case << endl;
#endif
        solve();
        cout << '\n';
    }
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 8020 KB Output is correct
2 Correct 23 ms 2140 KB Output is correct
3 Correct 67 ms 7856 KB Output is correct
4 Correct 54 ms 2652 KB Output is correct
5 Correct 87 ms 7052 KB Output is correct
6 Correct 56 ms 5468 KB Output is correct
7 Correct 12 ms 2136 KB Output is correct
8 Correct 56 ms 5532 KB Output is correct
9 Correct 133 ms 7004 KB Output is correct
10 Correct 77 ms 5448 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 456 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 504 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 1 ms 348 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 456 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 1 ms 504 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 60 ms 1640 KB Output is correct
17 Correct 82 ms 4072 KB Output is correct
18 Correct 213 ms 4440 KB Output is correct
19 Correct 1292 ms 4064 KB Output is correct
20 Correct 1433 ms 4436 KB Output is correct
21 Correct 75 ms 4008 KB Output is correct
22 Correct 5 ms 348 KB Output is correct
23 Correct 189 ms 2040 KB Output is correct
24 Correct 187 ms 4188 KB Output is correct
25 Correct 37 ms 860 KB Output is correct
26 Correct 117 ms 2652 KB Output is correct
27 Correct 213 ms 3476 KB Output is correct
28 Correct 192 ms 4192 KB Output is correct
29 Correct 31 ms 1884 KB Output is correct
30 Correct 6 ms 604 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 108 ms 8020 KB Output is correct
2 Correct 23 ms 2140 KB Output is correct
3 Correct 67 ms 7856 KB Output is correct
4 Correct 54 ms 2652 KB Output is correct
5 Correct 87 ms 7052 KB Output is correct
6 Correct 56 ms 5468 KB Output is correct
7 Correct 12 ms 2136 KB Output is correct
8 Correct 56 ms 5532 KB Output is correct
9 Correct 133 ms 7004 KB Output is correct
10 Correct 77 ms 5448 KB Output is correct
11 Correct 1 ms 344 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 456 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 1 ms 504 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 2 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 1 ms 348 KB Output is correct
23 Correct 2 ms 348 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 60 ms 1640 KB Output is correct
27 Correct 82 ms 4072 KB Output is correct
28 Correct 213 ms 4440 KB Output is correct
29 Correct 1292 ms 4064 KB Output is correct
30 Correct 1433 ms 4436 KB Output is correct
31 Correct 75 ms 4008 KB Output is correct
32 Correct 5 ms 348 KB Output is correct
33 Correct 189 ms 2040 KB Output is correct
34 Correct 187 ms 4188 KB Output is correct
35 Correct 37 ms 860 KB Output is correct
36 Correct 117 ms 2652 KB Output is correct
37 Correct 213 ms 3476 KB Output is correct
38 Correct 192 ms 4192 KB Output is correct
39 Correct 31 ms 1884 KB Output is correct
40 Correct 6 ms 604 KB Output is correct
41 Execution timed out 2045 ms 11856 KB Time limit exceeded
42 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 108 ms 8020 KB Output is correct
10 Correct 23 ms 2140 KB Output is correct
11 Correct 67 ms 7856 KB Output is correct
12 Correct 54 ms 2652 KB Output is correct
13 Correct 87 ms 7052 KB Output is correct
14 Correct 56 ms 5468 KB Output is correct
15 Correct 12 ms 2136 KB Output is correct
16 Correct 56 ms 5532 KB Output is correct
17 Correct 133 ms 7004 KB Output is correct
18 Correct 77 ms 5448 KB Output is correct
19 Correct 1 ms 344 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 456 KB Output is correct
22 Correct 2 ms 348 KB Output is correct
23 Correct 1 ms 504 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 1 ms 348 KB Output is correct
26 Correct 2 ms 348 KB Output is correct
27 Correct 1 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 1 ms 348 KB Output is correct
31 Correct 2 ms 348 KB Output is correct
32 Correct 2 ms 504 KB Output is correct
33 Correct 1 ms 348 KB Output is correct
34 Correct 60 ms 1640 KB Output is correct
35 Correct 82 ms 4072 KB Output is correct
36 Correct 213 ms 4440 KB Output is correct
37 Correct 1292 ms 4064 KB Output is correct
38 Correct 1433 ms 4436 KB Output is correct
39 Correct 75 ms 4008 KB Output is correct
40 Correct 5 ms 348 KB Output is correct
41 Correct 189 ms 2040 KB Output is correct
42 Correct 187 ms 4188 KB Output is correct
43 Correct 37 ms 860 KB Output is correct
44 Correct 117 ms 2652 KB Output is correct
45 Correct 213 ms 3476 KB Output is correct
46 Correct 192 ms 4192 KB Output is correct
47 Correct 31 ms 1884 KB Output is correct
48 Correct 6 ms 604 KB Output is correct
49 Execution timed out 2045 ms 11856 KB Time limit exceeded
50 Halted 0 ms 0 KB -