oj.uz

Submission #38401

# Submission time Handle Problem Language Result Execution time Memory
38401 2018-01-04T05:12:33 Z Talant Bomb (IZhO17_bomb) C++14
32 / 100
 1000 ms 131072 KB 
#include <bits/stdc++.h>

#define fr first
#define sc second
#define OK puts("OK");
#define pb push_back
#define mk make_pair

using namespace std;

typedef long long ll;

const int inf = (int)1e9 + 7;
const int N = (int)1e6 + 10;

int n,m;
char a[2501][2501];
int t[2501][2501];
int c[2501][2501];
int mx,mn = inf,mn1 = inf;
vector <pair<int,int> > v;

bool check (int h,int w) {
        for (int i = h; i <= n; i ++) {
                for (int j = w; j <= m; j ++) {
                        if (c[i][j] - c[i - h][j] - c[i][j - w] + c[i - h][j - w] == (h * w)) {
                                for (int l = i - h + 1; l <= i; l ++) {
                                        for (int r = j - w + 1; r <= j; r ++) {
                                                t[l][r] = -1;
                                        }
                                }
                        }
                }
        }
        int f = 0;

        for (int i = 0; i < v.size(); i ++) {
                if (t[v[i].fr][v[i].sc] == 1)
                        f = 1;
                t[v[i].fr][v[i].sc] = 1;
        }

        if (f)
                return false;
        return true;
}
int main () {
        cin >> n >> m;

        for (int i = 1; i <= n; i ++)
                scanf ("%s", a[i] + 1);

        for (int i = 1; i <= n; i ++) {
                int cnt = 0;
                for (int j = 1; j <= m; j ++) {
                        t[i][j] = int(a[i][j] - '0');
                        c[i][j] = t[i][j];
                        if (t[i][j] == 1)
                                v.pb(mk(i,j));
                        if (c[i][j] == 1)
                                cnt ++;
                        else {
                                if (cnt > 0)
                                mn = min(mn,cnt);
                        cnt = 0;
                        }
                }
                if (cnt > 0)
                        mn = min(mn,cnt);
        }
        for (int i = 1; i <= m; i ++) {
                int cnt = 0;
                for (int j = 1; j <= n; j ++) {
                        if (c[j][i] == 1)
                                cnt ++;
                        else {
                                if (cnt > 0)
                                mn1 = min(mn1,cnt);
                        cnt = 0;
                        }
                }
                if (cnt > 0)
                        mn1 = min(mn1,cnt);
        }
        if (mn == inf)
                mn = 0;
        if (mn1 == inf)
                mn1 = 0;

        if (mn * mn1 == 0) {
                cout << 0;
                return 0;
        }

        if (check(mn1,mn)) {
                cout << mn1 * mn;
                return 0;
        }

        for (int i = 1; i <= n; i ++)
                for (int j = 2; j <= m; j ++)
                        c[i][j] += c[i][j - 1];

        for (int i = 2; i <= n; i ++)
                for (int j = 1; j <= m; j ++)
                        c[i][j] += c[i - 1][j];

        for (int i = 1; i <= mn1; i ++) {
                for (int j = 1; j <= mn; j ++) {
                         if (mx >= i * j)
                                continue;
                         if (check(i,j))
                                mx = max(mx,i * j);
                }
        }
        cout << mx << endl;
}

Compilation message

bomb.cpp: In function 'bool check(int, int)':
bomb.cpp:37:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int i = 0; i < v.size(); i ++) {
                           ^
bomb.cpp: In function 'int main()':
bomb.cpp:51:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
                 scanf ("%s", a[i] + 1);
                                       ^

Subtask #1
32.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 56992 KB Output is correct
2 Correct 0 ms 56992 KB Output is correct
3 Correct 9 ms 57132 KB Output is correct
4 Correct 16 ms 57132 KB Output is correct
5 Correct 0 ms 57132 KB Output is correct
6 Correct 0 ms 56992 KB Output is correct
7 Correct 0 ms 56992 KB Output is correct
8 Correct 0 ms 56992 KB Output is correct
9 Correct 0 ms 56992 KB Output is correct
10 Correct 0 ms 56992 KB Output is correct
11 Correct 0 ms 56992 KB Output is correct
12 Correct 0 ms 56992 KB Output is correct
13 Correct 0 ms 56992 KB Output is correct
14 Correct 0 ms 56992 KB Output is correct
15 Correct 0 ms 56992 KB Output is correct
16 Correct 0 ms 56992 KB Output is correct
17 Correct 0 ms 56992 KB Output is correct
18 Correct 0 ms 56992 KB Output is correct
19 Correct 13 ms 56992 KB Output is correct
20 Correct 13 ms 56992 KB Output is correct
21 Correct 0 ms 56992 KB Output is correct
22 Correct 0 ms 56992 KB Output is correct
23 Correct 49 ms 57132 KB Output is correct
24 Correct 16 ms 56992 KB Output is correct
25 Correct 249 ms 57132 KB Output is correct
26 Correct 23 ms 57264 KB Output is correct
27 Correct 9 ms 58612 KB Output is correct
28 Correct 9 ms 56992 KB Output is correct
29 Execution timed out 1000 ms 58612 KB Execution timed out
30 Execution timed out 1000 ms 57844 KB Execution timed out
31 Execution timed out 1000 ms 57460 KB Execution timed out
32 Execution timed out 1000 ms 57460 KB Execution timed out
33 Execution timed out 1000 ms 57844 KB Execution timed out
34 Correct 13 ms 56992 KB Output is correct
35 Execution timed out 1000 ms 57264 KB Execution timed out
36 Execution timed out 1000 ms 60148 KB Execution timed out
37 Correct 0 ms 56992 KB Output is correct
38 Memory limit exceeded 79 ms 131072 KB Memory limit exceeded
39 Correct 0 ms 56992 KB Output is correct
40 Execution timed out 1000 ms 69364 KB Execution timed out
41 Correct 0 ms 56992 KB Output is correct
42 Execution timed out 1000 ms 57132 KB Execution timed out
43 Memory limit exceeded 93 ms 131072 KB Memory limit exceeded
44 Execution timed out 1000 ms 58612 KB Execution timed out
45 Execution timed out 1000 ms 106228 KB Execution timed out
46 Execution timed out 1000 ms 106228 KB Execution timed out
47 Execution timed out 1000 ms 106228 KB Execution timed out
48 Execution timed out 1000 ms 106228 KB Execution timed out
49 Memory limit exceeded 69 ms 131072 KB Memory limit exceeded
50 Execution timed out 1000 ms 106228 KB Execution timed out
51 Execution timed out 1000 ms 106228 KB Execution timed out
52 Execution timed out 1000 ms 106228 KB Execution timed out
53 Execution timed out 1000 ms 106228 KB Execution timed out
54 Execution timed out 1000 ms 81652 KB Execution timed out
55 Execution timed out 1000 ms 81652 KB Execution timed out
56 Memory limit exceeded 83 ms 131072 KB Memory limit exceeded
57 Execution timed out 1000 ms 81652 KB Execution timed out
58 Execution timed out 1000 ms 81652 KB Execution timed out
59 Execution timed out 1000 ms 81652 KB Execution timed out
60 Execution timed out 1000 ms 106228 KB Execution timed out
61 Memory limit exceeded 109 ms 131072 KB Memory limit exceeded
62 Memory limit exceeded 69 ms 131072 KB Memory limit exceeded
63 Memory limit exceeded 106 ms 131072 KB Memory limit exceeded
64 Execution timed out 1000 ms 81652 KB Execution timed out
65 Execution timed out 1000 ms 106228 KB Execution timed out
66 Execution timed out 1000 ms 106228 KB Execution timed out
67 Execution timed out 1000 ms 106228 KB Execution timed out
68 Memory limit exceeded 96 ms 131072 KB Memory limit exceeded
69 Execution timed out 1000 ms 81652 KB Execution timed out
70 Execution timed out 1000 ms 63220 KB Execution timed out
71 Execution timed out 1000 ms 69364 KB Execution timed out
72 Execution timed out 1000 ms 81652 KB Execution timed out
73 Execution timed out 1000 ms 81652 KB Execution timed out
74 Execution timed out 1000 ms 81652 KB Execution timed out
75 Execution timed out 1000 ms 81652 KB Execution timed out
76 Execution timed out 1000 ms 81652 KB Execution timed out
77 Execution timed out 1000 ms 81652 KB Execution timed out
78 Execution timed out 1000 ms 81652 KB Execution timed out
79 Execution timed out 1000 ms 57460 KB Execution timed out
80 Execution timed out 1000 ms 57460 KB Execution timed out
81 Execution timed out 1000 ms 60148 KB Execution timed out
82 Execution timed out 1000 ms 81652 KB Execution timed out
83 Execution timed out 1000 ms 81652 KB Execution timed out
84 Execution timed out 1000 ms 57264 KB Execution timed out
85 Execution timed out 1000 ms 81652 KB Execution timed out
86 Memory limit exceeded 103 ms 131072 KB Memory limit exceeded
87 Execution timed out 1000 ms 81652 KB Execution timed out
88 Execution timed out 1000 ms 81652 KB Execution timed out
89 Execution timed out 1000 ms 106228 KB Execution timed out
90 Execution timed out 1000 ms 69364 KB Execution timed out
91 Execution timed out 1000 ms 106228 KB Execution timed out
92 Execution timed out 1000 ms 106228 KB Execution timed out
93 Memory limit exceeded 79 ms 131072 KB Memory limit exceeded
94 Execution timed out 1000 ms 106228 KB Execution timed out
95 Execution timed out 1000 ms 81652 KB Execution timed out
96 Execution timed out 1000 ms 81652 KB Execution timed out
97 Memory limit exceeded 93 ms 131072 KB Memory limit exceeded
98 Execution timed out 1000 ms 81652 KB Execution timed out
99 Execution timed out 1000 ms 106228 KB Execution timed out
100 Memory limit exceeded 93 ms 131072 KB Memory limit exceeded