oj.uz

Submission #704711

# Submission time Handle Problem Language Result Execution time Memory
704711 2023-03-02T18:01:03 Z KiriLL1ca Bomb (IZhO17_bomb) C++17
3 / 100
 1000 ms 119908 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fr first
#define sc second
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define endl '\n'
#define sz(x) (int)((x).size())
#define vec vector
#define pw(x) (1ll << x)

#pragma GCC optimize ("Ofast")

using namespace std;
using namespace __gnu_pbds;

template <typename T> inline bool umin (T &a, const T &b) { if (a > b) { a = b; return 1; } return 0; }
template <typename T> inline bool umax (T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; }

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair <int, int> pii;

inline void solve () {
    int n, m; cin >> n >> m;
    vector <string> a (n);
    for (auto &i : a) cin >> i;
    vector <vector <int>> p (n, vector <int> (m));
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < m; ++j) {
            if (i) p[i][j] += p[i - 1][j];
            if (j) p[i][j] += p[i][j - 1];
            if (i && j) p[i][j] -= p[i - 1][j - 1];
            p[i][j] += (a[i][j] - '0');
        }
    }

    auto get = [&] (int x, int y, int xx, int yy) {
        int res = p[xx][yy];
        if (x) res -= p[x - 1][yy];
        if (y) res -= p[xx][y - 1];
        if (x && y) res += p[x - 1][y - 1];
        return res;
    };

    int ans = 0;

    {

        int side = 1e9;
        for (int i = 0; i < n; ++i) {
            for (int j = 0; j < m; ++j) {
                int res = 0;
                for (int q = 12; ~q; --q) {
                    res += pw(q);
                    if (j + res - 1 >= m || get(i, j, i, j + res - 1) != res) res -= pw(q);
                }
                if (res) umin(side, res);
                j += res;
            }
        }

        auto bad = [&] (int t) {
            vector <vector <int>> f (n + 1, vector <int> (m + 1));

            for (int i = 0; i + t - 1 < n; ++i) {
                for (int j = 0; j + side - 1 < m; ++j) {
                    if (get(i, j, i + t - 1, j + side - 1) == side * t) {
                        ++f[i][j];
                        --f[i + t][j];
                        --f[i][j + side];
                        ++f[i + t][j + side];
                    }
                }
            }

            for (int i = 0; i <= n; ++i) {
                for (int j = 0; j <= m; ++j) {
                    if (i) f[i][j] += f[i - 1][j];
                    if (j) f[i][j] += f[i][j - 1];
                    if (i && j) f[i][j] -= f[i - 1][j - 1];
                }
            }

            for (int i = 0; i < n; ++i) {
                for (int j = 0; j < m; ++j) {
                    if (a[i][j] == '1' && !f[i][j]) return 1;
                }
            }
            return 0;
        };

        int res = 0;
        for (int i = 12; ~i; --i) {
            res += pw(i);
            if (bad(res)) res -= pw(i);
        }
        umax(ans, side * res);
    }

    {

        int side = 1e9;
        for (int j = 0; j < m; ++j) {
            for (int i = 0; i < n; ++i) {
                int res = 0;
                for (int q = 12; ~q; --q) {
                    res += pw(q);
                    if (i + res - 1 >= n || get(i, j, i + res - 1, j) != res) res -= pw(q);
                }
                if (res) umin(side, res);
                i += res;
            }
        }

        auto bad = [&] (int t) {
            vector <vector <int>> f (n + 1, vector <int> (m + 1));

            for (int i = 0; i + side - 1 < n; ++i) {
                for (int j = 0; j + t - 1 < m; ++j) {
                    if (get(i, j, i + side - 1, j + t - 1) == side * t) {
                        ++f[i][j];
                        --f[i + t][j];
                        --f[i][j + side];
                        ++f[i + t][j + side];
                    }
                }
            }

            for (int i = 0; i <= n; ++i) {
                for (int j = 0; j <= m; ++j) {
                    if (i) f[i][j] += f[i - 1][j];
                    if (j) f[i][j] += f[i][j - 1];
                    if (i && j) f[i][j] -= f[i - 1][j - 1];
                }
            }

            for (int i = 0; i < n; ++i) {
                for (int j = 0; j < m; ++j) {
                    if (a[i][j] == '1' && !f[i][j]) return 1;
                }
            }
            return 0;
        };

        int res = 0;
        for (int i = 12; ~i; --i) {
            res += pw(i);
            if (bad(res)) res -= pw(i);
        }
        umax(ans, side * res);
    }
    cout << ans;
}

signed main () {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #ifdef LOCAL
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif// LOCAL
    int t = 1; //cin >> t;
    while (t--) solve();
    return 0;
}

Subtask #1
3.0 / 100.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 452 KB Execution killed with signal 11
2 Correct 1 ms 316 KB Output is correct
3 Runtime error 4 ms 1108 KB Execution killed with signal 6
4 Runtime error 4 ms 1108 KB Execution killed with signal 6
5 Runtime error 1 ms 468 KB Execution killed with signal 11
6 Runtime error 1 ms 468 KB Execution killed with signal 11
7 Runtime error 1 ms 340 KB Execution killed with signal 11
8 Incorrect 0 ms 212 KB Output isn't correct
9 Incorrect 0 ms 212 KB Output isn't correct
10 Runtime error 1 ms 456 KB Execution killed with signal 11
11 Incorrect 1 ms 212 KB Output isn't correct
12 Correct 1 ms 212 KB Output is correct
13 Runtime error 1 ms 468 KB Execution killed with signal 11
14 Correct 0 ms 212 KB Output is correct
15 Incorrect 1 ms 216 KB Output isn't correct
16 Runtime error 1 ms 444 KB Execution killed with signal 11
17 Runtime error 1 ms 448 KB Execution killed with signal 11
18 Incorrect 1 ms 324 KB Output isn't correct
19 Incorrect 2 ms 340 KB Output isn't correct
20 Incorrect 2 ms 340 KB Output isn't correct
21 Incorrect 1 ms 320 KB Output isn't correct
22 Incorrect 2 ms 340 KB Output isn't correct
23 Runtime error 2 ms 716 KB Execution killed with signal 6
24 Incorrect 2 ms 332 KB Output isn't correct
25 Runtime error 3 ms 592 KB Execution killed with signal 6
26 Runtime error 2 ms 604 KB Execution killed with signal 11
27 Runtime error 13 ms 2032 KB Execution killed with signal 11
28 Incorrect 28 ms 1428 KB Output isn't correct
29 Runtime error 19 ms 2784 KB Execution killed with signal 11
30 Runtime error 34 ms 4004 KB Execution killed with signal 6
31 Incorrect 36 ms 1836 KB Output isn't correct
32 Incorrect 29 ms 1908 KB Output isn't correct
33 Runtime error 32 ms 4404 KB Execution killed with signal 6
34 Incorrect 16 ms 1264 KB Output isn't correct
35 Incorrect 39 ms 2420 KB Output isn't correct
36 Runtime error 27 ms 4440 KB Execution killed with signal 11
37 Runtime error 1 ms 468 KB Execution killed with signal 11
38 Runtime error 551 ms 119820 KB Execution killed with signal 6
39 Runtime error 1 ms 468 KB Execution killed with signal 6
40 Runtime error 97 ms 15272 KB Execution killed with signal 6
41 Runtime error 1 ms 468 KB Execution killed with signal 6
42 Runtime error 2 ms 712 KB Execution killed with signal 6
43 Runtime error 948 ms 119824 KB Execution killed with signal 11
44 Runtime error 27 ms 4432 KB Execution killed with signal 6
45 Runtime error 961 ms 119844 KB Execution killed with signal 6
46 Execution timed out 1042 ms 62288 KB Time limit exceeded
47 Runtime error 942 ms 119780 KB Execution killed with signal 6
48 Execution timed out 1031 ms 97952 KB Time limit exceeded
49 Runtime error 768 ms 119840 KB Execution killed with signal 11
50 Execution timed out 1029 ms 89948 KB Time limit exceeded
51 Execution timed out 1006 ms 119804 KB Time limit exceeded
52 Execution timed out 1044 ms 119716 KB Time limit exceeded
53 Execution timed out 1049 ms 109972 KB Time limit exceeded
54 Execution timed out 1042 ms 62288 KB Time limit exceeded
55 Execution timed out 1033 ms 62508 KB Time limit exceeded
56 Runtime error 787 ms 119820 KB Execution killed with signal 6
57 Execution timed out 1031 ms 62376 KB Time limit exceeded
58 Execution timed out 1029 ms 62584 KB Time limit exceeded
59 Execution timed out 1041 ms 62332 KB Time limit exceeded
60 Execution timed out 1036 ms 62388 KB Time limit exceeded
61 Runtime error 671 ms 119812 KB Execution killed with signal 11
62 Runtime error 690 ms 119876 KB Execution killed with signal 11
63 Runtime error 555 ms 119760 KB Execution killed with signal 11
64 Execution timed out 1046 ms 62380 KB Time limit exceeded
65 Execution timed out 1026 ms 62524 KB Time limit exceeded
66 Runtime error 994 ms 119812 KB Execution killed with signal 11
67 Runtime error 996 ms 119876 KB Execution killed with signal 11
68 Runtime error 915 ms 119824 KB Execution killed with signal 11
69 Execution timed out 1036 ms 62332 KB Time limit exceeded
70 Incorrect 996 ms 40072 KB Output isn't correct
71 Execution timed out 1046 ms 62428 KB Time limit exceeded
72 Execution timed out 1052 ms 62316 KB Time limit exceeded
73 Execution timed out 1039 ms 62344 KB Time limit exceeded
74 Execution timed out 1038 ms 62352 KB Time limit exceeded
75 Execution timed out 1035 ms 62336 KB Time limit exceeded
76 Execution timed out 1049 ms 62456 KB Time limit exceeded
77 Execution timed out 1034 ms 62368 KB Time limit exceeded
78 Execution timed out 1045 ms 62316 KB Time limit exceeded
79 Execution timed out 1035 ms 62352 KB Time limit exceeded
80 Execution timed out 1038 ms 62332 KB Time limit exceeded
81 Execution timed out 1034 ms 62344 KB Time limit exceeded
82 Execution timed out 1100 ms 62300 KB Time limit exceeded
83 Execution timed out 1030 ms 62344 KB Time limit exceeded
84 Execution timed out 1014 ms 62336 KB Time limit exceeded
85 Execution timed out 1041 ms 62364 KB Time limit exceeded
86 Runtime error 811 ms 119864 KB Execution killed with signal 11
87 Execution timed out 1048 ms 62304 KB Time limit exceeded
88 Execution timed out 1041 ms 62304 KB Time limit exceeded
89 Execution timed out 1041 ms 62360 KB Time limit exceeded
90 Runtime error 760 ms 76792 KB Execution killed with signal 11
91 Execution timed out 1026 ms 62292 KB Time limit exceeded
92 Execution timed out 1045 ms 62340 KB Time limit exceeded
93 Runtime error 820 ms 119900 KB Execution killed with signal 11
94 Execution timed out 1046 ms 62396 KB Time limit exceeded
95 Execution timed out 1037 ms 62464 KB Time limit exceeded
96 Execution timed out 1027 ms 62432 KB Time limit exceeded
97 Runtime error 798 ms 119908 KB Execution killed with signal 11
98 Execution timed out 1035 ms 62344 KB Time limit exceeded
99 Execution timed out 1035 ms 62500 KB Time limit exceeded
100 Runtime error 827 ms 119904 KB Execution killed with signal 11