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Submission #171599

# Submission time Handle Problem Language Result Execution time Memory
171599 2019-12-29T10:40:20 Z mcdx9524 Bomb (IZhO17_bomb) C++14
32 / 100
 1000 ms 15736 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

const int N = 2500 + 7;

char a[N][N];

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int n, m;
    cin >> n >> m;
    if (n == 1 || m == 1) {
        vector <int> aa;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                char x;
                cin >> x;
                aa.push_back(x - '0');
            }
        }
        int cnt = 1;
        int res = 1e9;
        for (int i = 1; i < max(n, m); i++) {
            if (aa[i] != aa[i - 1]) {
                if (aa[i - 1] == 1) {
                    res = min(res, cnt);
                }
                cnt = 0;
            }
            cnt++;
        }
        if (aa[max(n, m) - 1] == 1) {
            res = min(res, cnt);
        }
        cout << res << '\n';
        return 0;
    }
    if (max(n, m) > 100) {
        //assert(0);
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> a[i][j];
        }
    }
    int ans = 0;
    for (int x = 1; x <= n; x++) {
        int bl = 1, br = m;
        while (bl <= br) {
            int y = (bl + br) / 2;
            char b[n + 7][m + 7];
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    b[i][j] = a[i][j];
                }
            }
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    if (i + x - 1 > n || j + y - 1 > m) {
                        continue;
                    }
                    bool bad = false;
                    for (int r = i; r <= i + x - 1; r++) {
                        for (int c = j; c <= j + y - 1; c++) {
                            if (b[r][c] == '0') {
                                bad = true;
                            }
                            if (bad) break;
                        }
                        if (bad) break;
                    }
                    if (bad) continue;
                    for (int r = i; r <= i + x - 1; r++) {
                        for (int c = j; c <= j + y - 1; c++) {
                            b[r][c] = '2';
                        }
                    }
                }
            }
            bool good = true;
            for (int i = 1; i <= n; i++) {
                for (int j = 1; j <= m; j++) {
                    if (a[i][j] == '0') {
                        continue;
                    }
                    if (a[i][j] == '1' && b[i][j] == '2') {
                        continue;
                    }
                    good = false;
                    if (!good) break;
                }
                if (!good) break;
            }
            if (good) {
                bl = y + 1;
                ans = max(ans, x * y);
            } else {
                br = y - 1;
            }
        }
    }
    cout << ans << '\n';
    return 0;
}

Subtask #1
32.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 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 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 476 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 1 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 11 ms 504 KB Output is correct
18 Correct 7 ms 504 KB Output is correct
19 Correct 26 ms 632 KB Output is correct
20 Correct 26 ms 632 KB Output is correct
21 Correct 6 ms 504 KB Output is correct
22 Correct 12 ms 632 KB Output is correct
23 Correct 74 ms 632 KB Output is correct
24 Correct 22 ms 632 KB Output is correct
25 Correct 113 ms 632 KB Output is correct
26 Correct 721 ms 652 KB Output is correct
27 Execution timed out 1078 ms 1272 KB Time limit exceeded
28 Correct 618 ms 1320 KB Output is correct
29 Execution timed out 1068 ms 1528 KB Time limit exceeded
30 Execution timed out 1075 ms 1784 KB Time limit exceeded
31 Execution timed out 1067 ms 1400 KB Time limit exceeded
32 Execution timed out 1079 ms 1656 KB Time limit exceeded
33 Execution timed out 1072 ms 1912 KB Time limit exceeded
34 Correct 534 ms 1432 KB Output is correct
35 Execution timed out 1079 ms 1912 KB Time limit exceeded
36 Execution timed out 1081 ms 1912 KB Time limit exceeded
37 Correct 1 ms 376 KB Output is correct
38 Execution timed out 1077 ms 15448 KB Time limit exceeded
39 Correct 2 ms 376 KB Output is correct
40 Execution timed out 1086 ms 3960 KB Time limit exceeded
41 Correct 2 ms 376 KB Output is correct
42 Correct 503 ms 684 KB Output is correct
43 Execution timed out 1080 ms 15404 KB Time limit exceeded
44 Execution timed out 1070 ms 1912 KB Time limit exceeded
45 Execution timed out 1079 ms 15480 KB Time limit exceeded
46 Execution timed out 1071 ms 15472 KB Time limit exceeded
47 Execution timed out 1071 ms 15480 KB Time limit exceeded
48 Execution timed out 1076 ms 15568 KB Time limit exceeded
49 Execution timed out 1079 ms 15480 KB Time limit exceeded
50 Execution timed out 1080 ms 15480 KB Time limit exceeded
51 Execution timed out 1076 ms 15356 KB Time limit exceeded
52 Execution timed out 1081 ms 15480 KB Time limit exceeded
53 Execution timed out 1075 ms 15456 KB Time limit exceeded
54 Execution timed out 1081 ms 15352 KB Time limit exceeded
55 Execution timed out 1064 ms 15436 KB Time limit exceeded
56 Execution timed out 1076 ms 15480 KB Time limit exceeded
57 Execution timed out 1069 ms 15480 KB Time limit exceeded
58 Execution timed out 1081 ms 15352 KB Time limit exceeded
59 Execution timed out 1078 ms 15480 KB Time limit exceeded
60 Execution timed out 1061 ms 15736 KB Time limit exceeded
61 Execution timed out 1065 ms 15736 KB Time limit exceeded
62 Execution timed out 1057 ms 15736 KB Time limit exceeded
63 Execution timed out 1069 ms 15664 KB Time limit exceeded
64 Execution timed out 1074 ms 15656 KB Time limit exceeded
65 Execution timed out 1074 ms 15736 KB Time limit exceeded
66 Execution timed out 1085 ms 15708 KB Time limit exceeded
67 Execution timed out 1082 ms 15660 KB Time limit exceeded
68 Execution timed out 1071 ms 15736 KB Time limit exceeded
69 Execution timed out 1076 ms 15708 KB Time limit exceeded
70 Execution timed out 1077 ms 12284 KB Time limit exceeded
71 Execution timed out 1071 ms 15608 KB Time limit exceeded
72 Execution timed out 1081 ms 15736 KB Time limit exceeded
73 Execution timed out 1084 ms 15608 KB Time limit exceeded
74 Execution timed out 1082 ms 15736 KB Time limit exceeded
75 Execution timed out 1069 ms 15480 KB Time limit exceeded
76 Execution timed out 1073 ms 15352 KB Time limit exceeded
77 Execution timed out 1077 ms 15224 KB Time limit exceeded
78 Execution timed out 1082 ms 15324 KB Time limit exceeded
79 Execution timed out 1080 ms 15224 KB Time limit exceeded
80 Execution timed out 1080 ms 15352 KB Time limit exceeded
81 Execution timed out 1080 ms 15324 KB Time limit exceeded
82 Execution timed out 1085 ms 15224 KB Time limit exceeded
83 Execution timed out 1080 ms 15452 KB Time limit exceeded
84 Execution timed out 1074 ms 15368 KB Time limit exceeded
85 Execution timed out 1080 ms 15348 KB Time limit exceeded
86 Execution timed out 1076 ms 15052 KB Time limit exceeded
87 Execution timed out 1079 ms 15096 KB Time limit exceeded
88 Execution timed out 1079 ms 15096 KB Time limit exceeded
89 Execution timed out 1074 ms 14968 KB Time limit exceeded
90 Execution timed out 1089 ms 11256 KB Time limit exceeded
91 Execution timed out 1069 ms 14712 KB Time limit exceeded
92 Execution timed out 1065 ms 14600 KB Time limit exceeded
93 Execution timed out 1066 ms 14712 KB Time limit exceeded
94 Execution timed out 1070 ms 14772 KB Time limit exceeded
95 Execution timed out 1084 ms 14712 KB Time limit exceeded
96 Execution timed out 1076 ms 14712 KB Time limit exceeded
97 Execution timed out 1074 ms 14456 KB Time limit exceeded
98 Execution timed out 1079 ms 14200 KB Time limit exceeded
99 Execution timed out 1067 ms 14328 KB Time limit exceeded
100 Execution timed out 1073 ms 14292 KB Time limit exceeded