oj.uz

Submission #705996

# Submission time Handle Problem Language Result Execution time Memory
705996 2023-03-05T18:17:24 Z KiriLL1ca Bomb (IZhO17_bomb) C++17
30 / 100
 1000 ms 61188 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) {
        int res = 0;
        for (int j = 12; ~j; --j) {
            res += pw(j);
            if (res > m || bad(i, res, n, m)) res -= pw(j);
        }
        umax(ans, i * res);
    }
    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 1 ms 340 KB Output is correct
2 Correct 1 ms 408 KB Output is correct
3 Correct 293 ms 10580 KB Output is correct
4 Correct 319 ms 10580 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 468 KB Output is correct
9 Correct 1 ms 468 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 468 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 1 ms 468 KB Output is correct
16 Correct 1 ms 468 KB Output is correct
17 Correct 15 ms 668 KB Output is correct
18 Correct 13 ms 724 KB Output is correct
19 Correct 34 ms 852 KB Output is correct
20 Correct 35 ms 852 KB Output is correct
21 Correct 12 ms 676 KB Output is correct
22 Correct 22 ms 724 KB Output is correct
23 Correct 47 ms 852 KB Output is correct
24 Correct 25 ms 724 KB Output is correct
25 Correct 49 ms 852 KB Output is correct
26 Correct 53 ms 892 KB Output is correct
27 Execution timed out 1086 ms 2456 KB Time limit exceeded
28 Execution timed out 1077 ms 2732 KB Time limit exceeded
29 Execution timed out 1077 ms 3220 KB Time limit exceeded
30 Execution timed out 1070 ms 4068 KB Time limit exceeded
31 Execution timed out 1071 ms 3360 KB Time limit exceeded
32 Execution timed out 1062 ms 3672 KB Time limit exceeded
33 Execution timed out 1074 ms 4368 KB Time limit exceeded
34 Execution timed out 1075 ms 2684 KB Time limit exceeded
35 Execution timed out 1068 ms 4424 KB Time limit exceeded
36 Execution timed out 1062 ms 4608 KB Time limit exceeded
37 Correct 1 ms 468 KB Output is correct
38 Execution timed out 1022 ms 60556 KB Time limit exceeded
39 Correct 1 ms 468 KB Output is correct
40 Execution timed out 1069 ms 11736 KB Time limit exceeded
41 Correct 1 ms 468 KB Output is correct
42 Correct 50 ms 900 KB Output is correct
43 Execution timed out 1056 ms 60500 KB Time limit exceeded
44 Execution timed out 1065 ms 4408 KB Time limit exceeded
45 Execution timed out 1047 ms 60536 KB Time limit exceeded
46 Execution timed out 1020 ms 60564 KB Time limit exceeded
47 Execution timed out 1022 ms 60564 KB Time limit exceeded
48 Execution timed out 1102 ms 60476 KB Time limit exceeded
49 Execution timed out 1040 ms 60820 KB Time limit exceeded
50 Execution timed out 1086 ms 60848 KB Time limit exceeded
51 Execution timed out 1020 ms 60808 KB Time limit exceeded
52 Execution timed out 1026 ms 61012 KB Time limit exceeded
53 Execution timed out 1100 ms 61112 KB Time limit exceeded
54 Execution timed out 1092 ms 61052 KB Time limit exceeded
55 Execution timed out 1086 ms 61060 KB Time limit exceeded
56 Execution timed out 1026 ms 60796 KB Time limit exceeded
57 Execution timed out 1025 ms 61088 KB Time limit exceeded
58 Execution timed out 1026 ms 60896 KB Time limit exceeded
59 Execution timed out 1031 ms 61076 KB Time limit exceeded
60 Execution timed out 1100 ms 61188 KB Time limit exceeded
61 Execution timed out 1012 ms 60856 KB Time limit exceeded
62 Execution timed out 1025 ms 60972 KB Time limit exceeded
63 Execution timed out 1008 ms 60964 KB Time limit exceeded
64 Execution timed out 1022 ms 61032 KB Time limit exceeded
65 Execution timed out 1010 ms 61036 KB Time limit exceeded
66 Execution timed out 1014 ms 60940 KB Time limit exceeded
67 Execution timed out 1094 ms 60944 KB Time limit exceeded
68 Execution timed out 1006 ms 60976 KB Time limit exceeded
69 Execution timed out 1008 ms 61020 KB Time limit exceeded
70 Execution timed out 1031 ms 44228 KB Time limit exceeded
71 Execution timed out 1031 ms 60996 KB Time limit exceeded
72 Execution timed out 1022 ms 60912 KB Time limit exceeded
73 Execution timed out 1043 ms 61012 KB Time limit exceeded
74 Execution timed out 1026 ms 59672 KB Time limit exceeded
75 Execution timed out 1052 ms 57404 KB Time limit exceeded
76 Execution timed out 1068 ms 56808 KB Time limit exceeded
77 Execution timed out 1068 ms 57252 KB Time limit exceeded
78 Execution timed out 1056 ms 56812 KB Time limit exceeded
79 Execution timed out 1081 ms 56932 KB Time limit exceeded
80 Execution timed out 1082 ms 56816 KB Time limit exceeded
81 Execution timed out 1076 ms 56764 KB Time limit exceeded
82 Execution timed out 1074 ms 56764 KB Time limit exceeded
83 Execution timed out 1033 ms 56800 KB Time limit exceeded
84 Execution timed out 1078 ms 56720 KB Time limit exceeded
85 Execution timed out 1081 ms 56748 KB Time limit exceeded
86 Execution timed out 1076 ms 56724 KB Time limit exceeded
87 Execution timed out 1065 ms 56968 KB Time limit exceeded
88 Execution timed out 1083 ms 57024 KB Time limit exceeded
89 Execution timed out 1077 ms 56900 KB Time limit exceeded
90 Execution timed out 1083 ms 40608 KB Time limit exceeded
91 Execution timed out 1081 ms 56668 KB Time limit exceeded
92 Execution timed out 1079 ms 57000 KB Time limit exceeded
93 Execution timed out 1090 ms 56632 KB Time limit exceeded
94 Execution timed out 1079 ms 56960 KB Time limit exceeded
95 Execution timed out 1087 ms 56744 KB Time limit exceeded
96 Execution timed out 1084 ms 56572 KB Time limit exceeded
97 Execution timed out 1063 ms 56752 KB Time limit exceeded
98 Execution timed out 1083 ms 56448 KB Time limit exceeded
99 Execution timed out 1083 ms 56600 KB Time limit exceeded
100 Execution timed out 1095 ms 56280 KB Time limit exceeded