답안 #38421

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
38421	2018-01-04T05:35:05 Z	Talant	Bomb (IZhO17_bomb)	C++14	32 / 100	1000 ms	130968 KB

bomb

#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 = 0; i < t.size(); i ++) {
                        if (max(v[l].fr,h) <= t[i].fr && t[i].fr <= min(n,v[l].fr + h - 1) &&  max(w,v[l].sc) <= t[i].sc && t[i].sc <= min(m,v[l].sc + w - 1)) {
                                f = 1;
                                break;
                        }
                }
                if (f)
                        continue;

                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 = 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:26:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (int l = 0; l < v.size(); l ++) {
                           ^
bomb.cpp:28:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                 for (int i = 0; i < t.size(); i ++) {
                                   ^
bomb.cpp: In function 'int main()':
bomb.cpp:61:39: 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

#	결과	실행 시간	메모리	Grader output
1	Correct	0 ms	32580 KB	Output is correct
2	Correct	0 ms	32580 KB	Output is correct
3	Correct	76 ms	32720 KB	Output is correct
4	Correct	106 ms	32720 KB	Output is correct
5	Correct	26 ms	32720 KB	Output is correct
6	Correct	29 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	Correct	0 ms	32580 KB	Output is 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	3 ms	32580 KB	Output is correct
18	Correct	0 ms	32580 KB	Output is correct
19	Correct	6 ms	32580 KB	Output is correct
20	Correct	6 ms	32580 KB	Output is correct
21	Correct	0 ms	32580 KB	Output is correct
22	Correct	0 ms	32580 KB	Output is correct
23	Correct	56 ms	32720 KB	Output is correct
24	Correct	9 ms	32580 KB	Output is correct
25	Correct	209 ms	32720 KB	Output is correct
26	Correct	913 ms	33044 KB	Output is correct
27	Execution timed out	1000 ms	35736 KB	Execution timed out
28	Correct	3 ms	32580 KB	Output is correct
29	Execution timed out	1000 ms	35736 KB	Execution timed out
30	Execution timed out	1000 ms	34200 KB	Execution timed out
31	Execution timed out	1000 ms	33432 KB	Execution timed out
32	Execution timed out	1000 ms	33432 KB	Execution timed out
33	Execution timed out	1000 ms	34200 KB	Execution timed out
34	Correct	3 ms	32580 KB	Output is correct
35	Execution timed out	1000 ms	33044 KB	Execution timed out
36	Execution timed out	1000 ms	36756 KB	Execution timed out
37	Correct	0 ms	32580 KB	Output is correct
38	Execution timed out	1000 ms	130968 KB	Execution timed out
39	Correct	0 ms	32580 KB	Output is correct
40	Execution timed out	1000 ms	44952 KB	Execution timed out
41	Correct	0 ms	32580 KB	Output is correct
42	Correct	879 ms	32720 KB	Output is correct
43	Execution timed out	1000 ms	130968 KB	Execution timed out
44	Execution timed out	1000 ms	35736 KB	Execution timed out
45	Execution timed out	1000 ms	81816 KB	Execution timed out
46	Execution timed out	1000 ms	81816 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	Execution timed out	1000 ms	130968 KB	Execution timed out
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	57240 KB	Execution timed out
56	Execution timed out	1000 ms	130968 KB	Execution timed out
57	Execution timed out	1000 ms	57240 KB	Execution timed out
58	Execution timed out	1000 ms	57240 KB	Execution timed out
59	Execution timed out	1000 ms	57240 KB	Execution timed out
60	Execution timed out	1000 ms	81816 KB	Execution timed out
61	Execution timed out	1000 ms	130968 KB	Execution timed out
62	Execution timed out	1000 ms	130968 KB	Execution timed out
63	Execution timed out	1000 ms	130968 KB	Execution timed out
64	Execution timed out	1000 ms	57240 KB	Execution timed out
65	Execution timed out	1000 ms	81816 KB	Execution timed out
66	Execution timed out	1000 ms	81816 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	57240 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	57240 KB	Execution timed out
79	Execution timed out	1000 ms	33432 KB	Execution timed out
80	Execution timed out	1000 ms	33432 KB	Execution timed out
81	Execution timed out	1000 ms	36756 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	Execution timed out	1000 ms	33044 KB	Execution timed out
85	Execution timed out	1000 ms	57240 KB	Execution timed out
86	Execution timed out	1000 ms	130968 KB	Execution timed out
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	Execution timed out	1000 ms	130968 KB	Execution timed out
94	Execution timed out	1000 ms	81816 KB	Execution timed out
95	Execution timed out	1000 ms	57240 KB	Execution timed out
96	Execution timed out	1000 ms	57240 KB	Execution timed out
97	Execution timed out	1000 ms	130968 KB	Execution timed out
98	Execution timed out	1000 ms	57240 KB	Execution timed out
99	Execution timed out	1000 ms	81816 KB	Execution timed out
100	Execution timed out	1000 ms	130968 KB	Execution timed out