oj.uz

Submission #944676

# Submission time Handle Problem Language Result Execution time Memory
944676 2024-03-13T03:06:20 Z GrandTiger1729 Bomb (IZhO17_bomb) C++17
0 / 100
 285 ms 37288 KB 
#include <bits/stdc++.h>
using namespace std;

const int INF = 1e9;
int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n, m;
    cin >> n >> m;
    vector<string> g(n);
    for (int i = 0; i < n; i++)
    {
        cin >> g[i];
    }
    int xx = INF, yy = INF;
    {
        vector<vector<int>> rr(n, vector<int>(m));
        for (int i = 0; i < n; i++)
        {
            int cur = m;
            for (int j = m - 1; j >= 0; j--)
            {
                if (g[i][j] == '0')
                {
                    cur = j;
                }
                rr[i][j] = cur;
            }
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if (rr[i][j] - j > 0)
                {
                    xx = min(xx, rr[i][j] - j);
                }
            }
        }
        for (int j = 0; j < m; j++)
        {
            int cur = n;
            for (int i = n - 1; i >= 0; i--)
            {
                if (g[i][j] == '0')
                {
                    cur = i;
                }
                rr[i][j] = cur;
            }
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if (rr[i][j] - i > 0)
                {
                    yy = min(yy, rr[i][j] - i);
                }
            }
        }
    }
    vector<int> res(yy, xx);
    auto solve = [&]()
    {
        vector<vector<int>> rr(n, vector<int>(m));
        for (int i = 0; i < n; i++)
        {
            int cur = m;
            for (int j = m - 1; j >= 0; j--)
            {
                if (g[i][j] == '0')
                {
                    cur = j;
                }
                rr[i][j] = cur;
            }
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if (rr[i][j] - j > 0)
                {
                    res[0] = min(res[0], rr[i][j] - j);
                }
            }
        }
        for (int i = 1; i < res.size(); i++)
        {
            res[i] = min(res[i], res[i - 1]);
        }
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < m; j++)
            {
                if (g[i][j] == '1' && (i == 0 || g[i - 1][j] == '0') && (j == 0 || g[i][j - 1] == '0'))
                {
                    int k = i, cur = INF;
                    while (k < n && k - i < res.size() && g[k][j] == '1')
                    {
                        cur = min(cur, rr[k][j] - j);
                        res[k - i] = min(res[k - i], cur);
                        k++;
                    }
                    res.resize(k - i);
                }
            }
        }
    };
    for (int tt = 0; tt < 2; tt++)
    {
        solve();
        reverse(g.begin(), g.end());
        solve();
        for (int i = 0; i < n; i++)
        {
            reverse(g[i].begin(), g[i].end());
        }
    }
    int ans = 0;
    for (int i = 0; i < res.size(); i++)
    {
        ans = max(ans, (i + 1) * res[i]);
    }
    cout << ans << '\n';
    return 0;
}

Compilation message

bomb.cpp: In lambda function:
bomb.cpp:89:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |         for (int i = 1; i < res.size(); i++)
      |                         ~~^~~~~~~~~~~~
bomb.cpp:100:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  100 |                     while (k < n && k - i < res.size() && g[k][j] == '1')
      |                                     ~~~~~~^~~~~~~~~~~~
bomb.cpp: In function 'int main()':
bomb.cpp:122:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  122 |     for (int i = 0; i < res.size(); i++)
      |                     ~~^~~~~~~~~~~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 344 KB Output isn't correct
2 Incorrect 0 ms 348 KB Output isn't correct
3 Incorrect 1 ms 604 KB Output isn't correct
4 Incorrect 1 ms 604 KB Output isn't correct
5 Incorrect 0 ms 348 KB Output isn't correct
6 Incorrect 0 ms 344 KB Output isn't correct
7 Incorrect 1 ms 348 KB Output isn't correct
8 Incorrect 1 ms 344 KB Output isn't correct
9 Incorrect 0 ms 348 KB Output isn't correct
10 Incorrect 0 ms 460 KB Output isn't correct
11 Incorrect 0 ms 348 KB Output isn't correct
12 Incorrect 1 ms 344 KB Output isn't correct
13 Incorrect 0 ms 348 KB Output isn't correct
14 Incorrect 1 ms 348 KB Output isn't correct
15 Incorrect 0 ms 348 KB Output isn't correct
16 Incorrect 1 ms 344 KB Output isn't correct
17 Incorrect 1 ms 348 KB Output isn't correct
18 Incorrect 0 ms 348 KB Output isn't correct
19 Incorrect 1 ms 348 KB Output isn't correct
20 Incorrect 1 ms 344 KB Output isn't correct
21 Incorrect 0 ms 348 KB Output isn't correct
22 Incorrect 1 ms 348 KB Output isn't correct
23 Incorrect 1 ms 348 KB Output isn't correct
24 Incorrect 1 ms 348 KB Output isn't correct
25 Incorrect 1 ms 344 KB Output isn't correct
26 Incorrect 1 ms 344 KB Output isn't correct
27 Incorrect 3 ms 1176 KB Output isn't correct
28 Incorrect 3 ms 1112 KB Output isn't correct
29 Incorrect 4 ms 1128 KB Output isn't correct
30 Incorrect 5 ms 1560 KB Output isn't correct
31 Incorrect 4 ms 1276 KB Output isn't correct
32 Incorrect 4 ms 1420 KB Output isn't correct
33 Incorrect 5 ms 1688 KB Output isn't correct
34 Incorrect 2 ms 1176 KB Output isn't correct
35 Incorrect 5 ms 1636 KB Output isn't correct
36 Incorrect 5 ms 1636 KB Output isn't correct
37 Incorrect 0 ms 348 KB Output isn't correct
38 Incorrect 285 ms 37052 KB Output isn't correct
39 Incorrect 0 ms 348 KB Output isn't correct
40 Incorrect 19 ms 5108 KB Output isn't correct
41 Incorrect 0 ms 348 KB Output isn't correct
42 Incorrect 1 ms 344 KB Output isn't correct
43 Incorrect 260 ms 36852 KB Output isn't correct
44 Incorrect 5 ms 1636 KB Output isn't correct
45 Incorrect 247 ms 36916 KB Output isn't correct
46 Incorrect 267 ms 36852 KB Output isn't correct
47 Incorrect 249 ms 36848 KB Output isn't correct
48 Incorrect 239 ms 36840 KB Output isn't correct
49 Incorrect 251 ms 36848 KB Output isn't correct
50 Incorrect 229 ms 36840 KB Output isn't correct
51 Incorrect 246 ms 36840 KB Output isn't correct
52 Incorrect 230 ms 36888 KB Output isn't correct
53 Incorrect 246 ms 36888 KB Output isn't correct
54 Incorrect 227 ms 36944 KB Output isn't correct
55 Incorrect 223 ms 36840 KB Output isn't correct
56 Incorrect 279 ms 36968 KB Output isn't correct
57 Incorrect 217 ms 36848 KB Output isn't correct
58 Incorrect 220 ms 36796 KB Output isn't correct
59 Incorrect 223 ms 36948 KB Output isn't correct
60 Incorrect 217 ms 36848 KB Output isn't correct
61 Incorrect 263 ms 37012 KB Output isn't correct
62 Incorrect 245 ms 36840 KB Output isn't correct
63 Incorrect 249 ms 36876 KB Output isn't correct
64 Incorrect 213 ms 36844 KB Output isn't correct
65 Incorrect 237 ms 36844 KB Output isn't correct
66 Incorrect 234 ms 37288 KB Output isn't correct
67 Incorrect 237 ms 36876 KB Output isn't correct
68 Incorrect 226 ms 36876 KB Output isn't correct
69 Incorrect 228 ms 37088 KB Output isn't correct
70 Incorrect 135 ms 24064 KB Output isn't correct
71 Incorrect 216 ms 36832 KB Output isn't correct
72 Incorrect 213 ms 36884 KB Output isn't correct
73 Incorrect 214 ms 36864 KB Output isn't correct
74 Incorrect 221 ms 37120 KB Output isn't correct
75 Incorrect 211 ms 36876 KB Output isn't correct
76 Incorrect 211 ms 36892 KB Output isn't correct
77 Incorrect 224 ms 36844 KB Output isn't correct
78 Incorrect 215 ms 36888 KB Output isn't correct
79 Incorrect 202 ms 36844 KB Output isn't correct
80 Incorrect 203 ms 36848 KB Output isn't correct
81 Incorrect 204 ms 37060 KB Output isn't correct
82 Incorrect 221 ms 36912 KB Output isn't correct
83 Incorrect 217 ms 36872 KB Output isn't correct
84 Incorrect 196 ms 37008 KB Output isn't correct
85 Incorrect 210 ms 36812 KB Output isn't correct
86 Incorrect 255 ms 36876 KB Output isn't correct
87 Incorrect 216 ms 36980 KB Output isn't correct
88 Incorrect 210 ms 36872 KB Output isn't correct
89 Incorrect 225 ms 36984 KB Output isn't correct
90 Incorrect 119 ms 24040 KB Output isn't correct
91 Incorrect 216 ms 36892 KB Output isn't correct
92 Incorrect 219 ms 36848 KB Output isn't correct
93 Incorrect 244 ms 36788 KB Output isn't correct
94 Incorrect 210 ms 36816 KB Output isn't correct
95 Incorrect 215 ms 36844 KB Output isn't correct
96 Incorrect 209 ms 36876 KB Output isn't correct
97 Incorrect 266 ms 36628 KB Output isn't correct
98 Incorrect 213 ms 36616 KB Output isn't correct
99 Incorrect 227 ms 36620 KB Output isn't correct
100 Incorrect 227 ms 36604 KB Output isn't correct