oj.uz

Submission #170978

# Submission time Handle Problem Language Result Execution time Memory
170978 2019-12-26T21:25:12 Z davitmarg Bomb (IZhO17_bomb) C++17
40 / 100
 741 ms 80248 KB 
/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <queue>
#include <iomanip>
#include <bitset>
#include <stack>
#include <cassert>
#include <iterator>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(), v.end()
using namespace std;

const int N = 2505;

int n, m, a[N][N], pr[N][N], nxt[N][N], d[N], Y, X, ans;

int get(int sy, int sx, int y, int x)
{
    sy--;
    sx--;
    if (sy == -1 || sx == -1)
        return pr[y][x];
    return pr[y][x] - pr[sy][x] - pr[y][sx] + pr[sy][sx];
}

int main()
{
    cin >> n >> m;

    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
        {
            char x;
            scanf(" %c", &x);
            a[i][j] += (x - '0');
            pr[i][j] = a[i][j] + pr[i - 1][j] + pr[i][j - 1] - pr[i - 1][j - 1];
        }
    X = m;
    Y = n;
    for (int i = 1; i <= n; i++)
        for (int j = m; j >= 1; j--)
        {
            if (a[i][j])
                nxt[i][j] = nxt[i][j + 1] + 1;
            else
                nxt[i][j] = 0;
            if (a[i][j - 1] == 0 && a[i][j])
                X = min(X, nxt[i][j]);
        }

    for (int j = 1; j <= m; j++)
    {
        int y = 0;
        for (int i = 1; i <= n; i++)
        {
            if (a[i][j])
                y++;
            else
                y = 0;
            if (a[i][j] && a[i + 1][j] == 0)
                Y = min(y, Y);
        }
    }

    for (int i = 1; i <= Y; i++)
        d[i] = X;

    for (int j = 1; j <= m; j++)
    {
        int y = 0, x = X;
        for (int i = 1; i <= n; i++)
        {
            if (a[i][j] == 0)
            {
                y = 0;
                x = X;
            }
            else
            {
                y++;
                x = min(x, nxt[i][j]);
                if (get(i - y + 1, j - 1, i, j - 1) != y)
                    d[y] = min(x, d[y]);
            }
            //cout << i << " : " << j << " = " << y << " : " << x << endl;
        }
    }

    // for (int j = 1; j <= m; j++)
    // {
    //     int y = 0, x = X;
    //     for (int i = n; i >= 1; i--)
    //     {
    //         if (a[i][j] == 0)
    //         {
    //             y = 0;
    //             x = X;
    //         }
    //         else
    //         {
    //             y++;
    //             x = min(x, nxt[i][j]);
    //             if (get(i, j - 1, i + y - 1, j - 1) != y)
    //                 d[y] = min(x, d[y]);
    //         }
    //         //cout << i << " : " << j << " = " << y << " : " << x << endl;
    //     }
    // }

    for (int i = 1; i <= Y; i++)
    {
        //d[i + 1] = min(d[i + 1], d[i]);
        //cout << i << " : " << d[i] << endl;
        ans = max(ans, i * d[i]);
    }

    cout << ans << endl;
    return 0;
}

/*

4 3
110
111
111
011

5 6
100000
111110
111110
111110
100000

6 5
00110
01110
11110
11011
11111
11111


9 9
000000000
000111000
000111000
011111110
011101110
011111110
000111000
000111000
000000000
 
9 9
000000000
000111000
000111000
011111110
011101110
011111110
000111000
000111000
000000000

6 6
000111
000111
001111
111100
111000
111000

6 6
111000
111000
111100
001111
000111
000111

6 6
000111
011111
011111
111000
111000
111000
 
*/

Compilation message

bomb.cpp: In function 'int main()':
bomb.cpp:47:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c", &x);
             ~~~~~^~~~~~~~~~~

Subtask #1
40.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 504 KB Output is correct
3 Correct 37 ms 30456 KB Output is correct
4 Correct 37 ms 30456 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Incorrect 2 ms 504 KB Output isn't correct
9 Incorrect 2 ms 632 KB Output isn't correct
10 Correct 2 ms 504 KB Output is correct
11 Incorrect 2 ms 632 KB Output isn't correct
12 Correct 2 ms 504 KB Output is correct
13 Correct 2 ms 508 KB Output is correct
14 Correct 2 ms 504 KB Output is correct
15 Incorrect 2 ms 632 KB Output isn't correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 3 ms 1144 KB Output is correct
18 Correct 3 ms 1272 KB Output is correct
19 Incorrect 4 ms 1528 KB Output isn't correct
20 Incorrect 4 ms 1528 KB Output isn't correct
21 Correct 3 ms 1016 KB Output is correct
22 Correct 3 ms 1272 KB Output is correct
23 Incorrect 4 ms 1588 KB Output isn't correct
24 Incorrect 3 ms 1400 KB Output isn't correct
25 Incorrect 4 ms 1656 KB Output isn't correct
26 Correct 4 ms 1656 KB Output is correct
27 Correct 12 ms 4932 KB Output is correct
28 Incorrect 14 ms 5340 KB Output isn't correct
29 Incorrect 17 ms 6648 KB Output isn't correct
30 Incorrect 21 ms 7928 KB Output isn't correct
31 Incorrect 17 ms 6268 KB Output isn't correct
32 Incorrect 18 ms 7160 KB Output isn't correct
33 Incorrect 23 ms 8440 KB Output isn't correct
34 Incorrect 12 ms 5624 KB Output isn't correct
35 Incorrect 22 ms 8312 KB Output isn't correct
36 Correct 24 ms 8312 KB Output is correct
37 Incorrect 2 ms 504 KB Output isn't correct
38 Correct 738 ms 78968 KB Output is correct
39 Incorrect 3 ms 504 KB Output isn't correct
40 Incorrect 92 ms 20728 KB Output isn't correct
41 Correct 2 ms 632 KB Output is correct
42 Correct 4 ms 1656 KB Output is correct
43 Correct 669 ms 79016 KB Output is correct
44 Correct 24 ms 8312 KB Output is correct
45 Incorrect 670 ms 79464 KB Output isn't correct
46 Correct 651 ms 79352 KB Output is correct
47 Incorrect 660 ms 78972 KB Output isn't correct
48 Correct 653 ms 79004 KB Output is correct
49 Correct 741 ms 78940 KB Output is correct
50 Incorrect 656 ms 78668 KB Output isn't correct
51 Incorrect 650 ms 78548 KB Output isn't correct
52 Correct 649 ms 78584 KB Output is correct
53 Incorrect 645 ms 78076 KB Output isn't correct
54 Correct 588 ms 78428 KB Output is correct
55 Incorrect 584 ms 78584 KB Output isn't correct
56 Correct 720 ms 78584 KB Output is correct
57 Incorrect 593 ms 78472 KB Output isn't correct
58 Correct 589 ms 78448 KB Output is correct
59 Correct 585 ms 78904 KB Output is correct
60 Correct 644 ms 78620 KB Output is correct
61 Correct 738 ms 78616 KB Output is correct
62 Correct 735 ms 78556 KB Output is correct
63 Correct 732 ms 79616 KB Output is correct
64 Correct 588 ms 79224 KB Output is correct
65 Correct 671 ms 79152 KB Output is correct
66 Incorrect 643 ms 80104 KB Output isn't correct
67 Correct 672 ms 79864 KB Output is correct
68 Incorrect 670 ms 79480 KB Output isn't correct
69 Correct 584 ms 80028 KB Output is correct
70 Incorrect 343 ms 63088 KB Output isn't correct
71 Incorrect 548 ms 78836 KB Output isn't correct
72 Incorrect 573 ms 78904 KB Output isn't correct
73 Incorrect 585 ms 80040 KB Output isn't correct
74 Incorrect 575 ms 80112 KB Output isn't correct
75 Incorrect 578 ms 80120 KB Output isn't correct
76 Incorrect 585 ms 80112 KB Output isn't correct
77 Incorrect 599 ms 80248 KB Output isn't correct
78 Incorrect 614 ms 79992 KB Output isn't correct
79 Incorrect 549 ms 80020 KB Output isn't correct
80 Incorrect 539 ms 79944 KB Output isn't correct
81 Incorrect 516 ms 80108 KB Output isn't correct
82 Incorrect 596 ms 80152 KB Output isn't correct
83 Incorrect 601 ms 79960 KB Output isn't correct
84 Incorrect 509 ms 80124 KB Output isn't correct
85 Incorrect 591 ms 80160 KB Output isn't correct
86 Incorrect 712 ms 80080 KB Output isn't correct
87 Incorrect 576 ms 80248 KB Output isn't correct
88 Incorrect 595 ms 79776 KB Output isn't correct
89 Incorrect 627 ms 79976 KB Output isn't correct
90 Incorrect 369 ms 63176 KB Output isn't correct
91 Incorrect 619 ms 80112 KB Output isn't correct
92 Incorrect 634 ms 79868 KB Output isn't correct
93 Incorrect 709 ms 79508 KB Output isn't correct
94 Incorrect 628 ms 79624 KB Output isn't correct
95 Incorrect 592 ms 79480 KB Output isn't correct
96 Incorrect 596 ms 79440 KB Output isn't correct
97 Incorrect 731 ms 79224 KB Output isn't correct
98 Incorrect 608 ms 78980 KB Output isn't correct
99 Incorrect 622 ms 78868 KB Output isn't correct
100 Incorrect 714 ms 78884 KB Output isn't correct