oj.uz

Submission #705995

# Submission time Handle Problem Language Result Execution time Memory
705995 2023-03-05T18:16:21 Z KiriLL1ca Bomb (IZhO17_bomb) C++17
30 / 100
 1000 ms 62660 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)

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;
typedef pair <ll, ll> pll;

const int N = 2505;

string a[N];
int p[N][N];

inline int 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;
}

inline bool bad (int s, int t, int n, int m) {
    vector <vector <int>> f (n + 1, vector <int> (m + 1));

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

    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;
}


inline void solve () {
    int n, m; cin >> n >> m;
    for (int i = 0; i < n; ++i) cin >> a[i];

    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');
        }
    }

    int ans = 0;
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= m; ++j) {
            if (!bad(i, j, n, m)) umax(ans, i * j);
        }
    }
    cout << ans << endl;
}

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
30.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 297 ms 10580 KB Output is correct
4 Correct 300 ms 10580 KB Output is correct
5 Correct 55 ms 340 KB Output is correct
6 Correct 10 ms 340 KB Output is correct
7 Correct 1 ms 404 KB Output is correct
8 Correct 2 ms 492 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 2 ms 488 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 135 ms 696 KB Output is correct
18 Correct 115 ms 776 KB Output is correct
19 Correct 336 ms 852 KB Output is correct
20 Correct 376 ms 852 KB Output is correct
21 Correct 141 ms 656 KB Output is correct
22 Correct 316 ms 724 KB Output is correct
23 Correct 631 ms 892 KB Output is correct
24 Correct 226 ms 784 KB Output is correct
25 Correct 633 ms 896 KB Output is correct
26 Correct 649 ms 896 KB Output is correct
27 Execution timed out 1069 ms 2452 KB Time limit exceeded
28 Execution timed out 1084 ms 2660 KB Time limit exceeded
29 Execution timed out 1076 ms 3320 KB Time limit exceeded
30 Execution timed out 1036 ms 4152 KB Time limit exceeded
31 Execution timed out 1070 ms 3292 KB Time limit exceeded
32 Execution timed out 1083 ms 3592 KB Time limit exceeded
33 Execution timed out 1069 ms 4396 KB Time limit exceeded
34 Execution timed out 1076 ms 2756 KB Time limit exceeded
35 Execution timed out 1081 ms 4468 KB Time limit exceeded
36 Execution timed out 1084 ms 4396 KB Time limit exceeded
37 Correct 2 ms 468 KB Output is correct
38 Execution timed out 1048 ms 62324 KB Time limit exceeded
39 Correct 2 ms 468 KB Output is correct
40 Execution timed out 1082 ms 11792 KB Time limit exceeded
41 Correct 2 ms 468 KB Output is correct
42 Correct 651 ms 972 KB Output is correct
43 Execution timed out 1043 ms 62416 KB Time limit exceeded
44 Execution timed out 1083 ms 4432 KB Time limit exceeded
45 Execution timed out 1038 ms 62572 KB Time limit exceeded
46 Execution timed out 1037 ms 62360 KB Time limit exceeded
47 Execution timed out 1038 ms 62236 KB Time limit exceeded
48 Execution timed out 1050 ms 62220 KB Time limit exceeded
49 Execution timed out 1043 ms 62364 KB Time limit exceeded
50 Execution timed out 1028 ms 62416 KB Time limit exceeded
51 Execution timed out 1038 ms 62276 KB Time limit exceeded
52 Execution timed out 1056 ms 62228 KB Time limit exceeded
53 Execution timed out 1029 ms 62436 KB Time limit exceeded
54 Execution timed out 1039 ms 62416 KB Time limit exceeded
55 Execution timed out 1044 ms 62232 KB Time limit exceeded
56 Execution timed out 1022 ms 62412 KB Time limit exceeded
57 Execution timed out 1042 ms 62468 KB Time limit exceeded
58 Execution timed out 1051 ms 62336 KB Time limit exceeded
59 Execution timed out 1044 ms 62660 KB Time limit exceeded
60 Execution timed out 1040 ms 62532 KB Time limit exceeded
61 Execution timed out 1044 ms 62524 KB Time limit exceeded
62 Execution timed out 1045 ms 62404 KB Time limit exceeded
63 Execution timed out 1036 ms 62400 KB Time limit exceeded
64 Execution timed out 1018 ms 62616 KB Time limit exceeded
65 Execution timed out 1036 ms 62488 KB Time limit exceeded
66 Execution timed out 1050 ms 62276 KB Time limit exceeded
67 Execution timed out 1040 ms 62420 KB Time limit exceeded
68 Execution timed out 1041 ms 62476 KB Time limit exceeded
69 Execution timed out 1042 ms 62324 KB Time limit exceeded
70 Execution timed out 1059 ms 44068 KB Time limit exceeded
71 Execution timed out 1048 ms 62452 KB Time limit exceeded
72 Execution timed out 1037 ms 62316 KB Time limit exceeded
73 Execution timed out 1028 ms 62368 KB Time limit exceeded
74 Execution timed out 1038 ms 62316 KB Time limit exceeded
75 Execution timed out 1010 ms 62400 KB Time limit exceeded
76 Execution timed out 1041 ms 62460 KB Time limit exceeded
77 Execution timed out 1034 ms 62300 KB Time limit exceeded
78 Execution timed out 1029 ms 62232 KB Time limit exceeded
79 Execution timed out 1032 ms 62364 KB Time limit exceeded
80 Execution timed out 1082 ms 62308 KB Time limit exceeded
81 Execution timed out 1028 ms 62308 KB Time limit exceeded
82 Execution timed out 1046 ms 62244 KB Time limit exceeded
83 Execution timed out 1042 ms 62348 KB Time limit exceeded
84 Execution timed out 1041 ms 62300 KB Time limit exceeded
85 Execution timed out 1053 ms 62228 KB Time limit exceeded
86 Execution timed out 1014 ms 62284 KB Time limit exceeded
87 Execution timed out 1032 ms 62320 KB Time limit exceeded
88 Execution timed out 1042 ms 62276 KB Time limit exceeded
89 Execution timed out 1051 ms 62320 KB Time limit exceeded
90 Execution timed out 1036 ms 44008 KB Time limit exceeded
91 Execution timed out 1033 ms 62304 KB Time limit exceeded
92 Execution timed out 1029 ms 62228 KB Time limit exceeded
93 Execution timed out 1028 ms 62308 KB Time limit exceeded
94 Execution timed out 1037 ms 62300 KB Time limit exceeded
95 Execution timed out 1051 ms 62392 KB Time limit exceeded
96 Execution timed out 1014 ms 62448 KB Time limit exceeded
97 Execution timed out 1016 ms 62360 KB Time limit exceeded
98 Execution timed out 1035 ms 62488 KB Time limit exceeded
99 Execution timed out 1044 ms 62364 KB Time limit exceeded
100 Execution timed out 1045 ms 62392 KB Time limit exceeded