oj.uz

Submission #38427

# Submission time Handle Problem Language Result Execution time Memory
38427 2018-01-04T05:48:22 Z Talant Bomb (IZhO17_bomb) C++14
28 / 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[2502][2502];
int c[2502][2502];

int mx,mn = inf,mn1 = inf;
vector <pair<int,int> > v;

bool check (int h,int w) {
        vector <pair<int,int> > t;

        for (int l = 0; l < v.size(); l ++) {
                int f = 0;
                for (int i = max(v[l].fr,h); i <= min(n,v[l].fr + h - 1); i ++) {
                        for (int j = max(w,v[l].sc); j <= min(m,v[l].sc + w - 1); j ++) {
                                if (i - h < 0)
                                        continue;
                                if (j - w < 0)
                                        continue;
                                if (c[i][j] - c[i - h][j] - c[i][j - w] + c[i - h][j - w] == (h * w)) {
                                        t.pb(mk(i,j));
                                        f = 1;
                                        break;
                                }
                        }
                        if (f == 1)
                                break;
                }
                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 ++) {
                        c[i][j] = int(a[i][j] - '0');
                        if (c[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 = mn1; i >= 1; i --) {
                for (int j = mn; j >= max(1,mn - (mn1 - i)); j --) {
                         if (mx >= i * j)
                                continue;
                         if (check(i,j)) {
                                cout << i * j << endl;
                                return 0;
                         }
                        if (check (j,i)) {
                                cout << i * j << endl;
                                return 0;
                        }
                }
        }
}

Compilation message

bomb.cpp: In function 'bool check(int, int)':
bomb.cpp:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int l = 0; l < v.size(); l ++) {
                           ^
bomb.cpp: In function 'int main()':
bomb.cpp:52:39: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
                 scanf ("%s", a[i] + 1);
                                       ^

Subtask #1
28.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 32580 KB Output is correct
2 Correct 0 ms 32580 KB Output is correct
3 Correct 0 ms 32720 KB Output is correct
4 Correct 0 ms 32720 KB Output is correct
5 Correct 0 ms 32720 KB Output is correct
6 Correct 0 ms 32580 KB Output is correct
7 Correct 0 ms 32580 KB Output is correct
8 Correct 0 ms 32580 KB Output is correct
9 Correct 0 ms 32580 KB Output is correct
10 Incorrect 0 ms 32580 KB Output isn't correct
11 Correct 0 ms 32580 KB Output is correct
12 Correct 0 ms 32580 KB Output is correct
13 Correct 0 ms 32580 KB Output is correct
14 Correct 0 ms 32580 KB Output is correct
15 Correct 0 ms 32580 KB Output is correct
16 Correct 0 ms 32580 KB Output is correct
17 Correct 0 ms 32580 KB Output is correct
18 Correct 0 ms 32580 KB Output is correct
19 Incorrect 0 ms 32580 KB Output isn't correct
20 Incorrect 0 ms 32580 KB Output isn't correct
21 Correct 0 ms 32580 KB Output is correct
22 Correct 0 ms 32580 KB Output is correct
23 Incorrect 3 ms 32720 KB Output isn't correct
24 Correct 3 ms 32580 KB Output is correct
25 Correct 19 ms 32720 KB Output is correct
26 Correct 0 ms 32920 KB Output is correct
27 Correct 3 ms 35736 KB Output is correct
28 Correct 3 ms 32580 KB Output is correct
29 Execution timed out 1000 ms 34200 KB Execution timed out
30 Execution timed out 1000 ms 33684 KB Execution timed out
31 Execution timed out 1000 ms 33172 KB Execution timed out
32 Incorrect 323 ms 33432 KB Output isn't correct
33 Execution timed out 1000 ms 33684 KB Execution timed out
34 Incorrect 3 ms 32580 KB Output isn't correct
35 Incorrect 33 ms 32920 KB Output isn't correct
36 Correct 13 ms 38808 KB Output is correct
37 Incorrect 0 ms 32580 KB Output isn't correct
38 Memory limit exceeded 293 ms 131072 KB Memory limit exceeded
39 Correct 0 ms 32580 KB Output is correct
40 Execution timed out 1000 ms 49044 KB Execution timed out
41 Incorrect 0 ms 32580 KB Output isn't correct
42 Incorrect 79 ms 32720 KB Output isn't correct
43 Execution timed out 1000 ms 130968 KB Execution timed out
44 Execution timed out 1000 ms 34200 KB Execution timed out
45 Execution timed out 1000 ms 81816 KB Execution timed out
46 Execution timed out 1000 ms 130968 KB Execution timed out
47 Execution timed out 1000 ms 81816 KB Execution timed out
48 Execution timed out 1000 ms 81816 KB Execution timed out
49 Memory limit exceeded 306 ms 131072 KB Memory limit exceeded
50 Execution timed out 1000 ms 81816 KB Execution timed out
51 Execution timed out 1000 ms 81816 KB Execution timed out
52 Execution timed out 1000 ms 81816 KB Execution timed out
53 Execution timed out 1000 ms 81816 KB Execution timed out
54 Execution timed out 1000 ms 57240 KB Execution timed out
55 Execution timed out 1000 ms 65428 KB Execution timed out
56 Memory limit exceeded 359 ms 131072 KB Memory limit exceeded
57 Execution timed out 1000 ms 81816 KB Execution timed out
58 Execution timed out 1000 ms 81816 KB Execution timed out
59 Execution timed out 1000 ms 81816 KB Execution timed out
60 Correct 246 ms 130968 KB Output is correct
61 Memory limit exceeded 366 ms 131072 KB Memory limit exceeded
62 Execution timed out 1000 ms 130968 KB Execution timed out
63 Memory limit exceeded 256 ms 131072 KB Memory limit exceeded
64 Correct 386 ms 81816 KB Output is correct
65 Execution timed out 1000 ms 81816 KB Execution timed out
66 Execution timed out 1000 ms 98196 KB Execution timed out
67 Execution timed out 1000 ms 81816 KB Execution timed out
68 Execution timed out 1000 ms 130968 KB Execution timed out
69 Execution timed out 1000 ms 81816 KB Execution timed out
70 Execution timed out 1000 ms 38808 KB Execution timed out
71 Execution timed out 1000 ms 44952 KB Execution timed out
72 Execution timed out 1000 ms 57240 KB Execution timed out
73 Execution timed out 1000 ms 57240 KB Execution timed out
74 Execution timed out 1000 ms 57240 KB Execution timed out
75 Execution timed out 1000 ms 57240 KB Execution timed out
76 Execution timed out 1000 ms 57240 KB Execution timed out
77 Execution timed out 1000 ms 57240 KB Execution timed out
78 Execution timed out 1000 ms 65428 KB Execution timed out
79 Incorrect 193 ms 33432 KB Output isn't correct
80 Incorrect 226 ms 33432 KB Output isn't correct
81 Execution timed out 1000 ms 35736 KB Execution timed out
82 Execution timed out 1000 ms 57240 KB Execution timed out
83 Execution timed out 1000 ms 57240 KB Execution timed out
84 Incorrect 223 ms 33044 KB Output isn't correct
85 Execution timed out 1000 ms 57240 KB Execution timed out
86 Memory limit exceeded 336 ms 131072 KB Memory limit exceeded
87 Execution timed out 1000 ms 57240 KB Execution timed out
88 Execution timed out 1000 ms 57240 KB Execution timed out
89 Execution timed out 1000 ms 81816 KB Execution timed out
90 Execution timed out 1000 ms 44952 KB Execution timed out
91 Execution timed out 1000 ms 81816 KB Execution timed out
92 Execution timed out 1000 ms 81816 KB Execution timed out
93 Memory limit exceeded 476 ms 131072 KB Memory limit exceeded
94 Execution timed out 1000 ms 81816 KB Execution timed out
95 Execution timed out 1000 ms 65428 KB Execution timed out
96 Execution timed out 1000 ms 57240 KB Execution timed out
97 Memory limit exceeded 326 ms 131072 KB Memory limit exceeded
98 Execution timed out 1000 ms 65428 KB Execution timed out
99 Execution timed out 1000 ms 81816 KB Execution timed out
100 Memory limit exceeded 773 ms 131072 KB Memory limit exceeded