oj.uz

Submission #173098

# Submission time Handle Problem Language Result Execution time Memory
173098 2020-01-03T11:12:37 Z VEGAnn Bomb (IZhO17_bomb) C++14
41 / 100
 1000 ms 102416 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define sz(x) ((int)x.size())
#define MP make_pair
#define ft first
#define sd second
#define pii pair<int, int>
#define PB push_back
using namespace std;
using namespace __gnu_pbds;
template <class T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const int N = 2510;
const int oo = 2e9;
int n, m, ans, a[N][N], pref[N][N], vl[N][N], pl[N][N];

bool ok(int ht, int wd){
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
            pl[i][j] = 0;

    for (int i = 1; i <= n; i++)
    for (int j = 1; j <= m; j++){
        if (i + ht - 1 > n || j + wd - 1 > m)
            break;
        int i1 = i + ht - 1, i2 = i - 1;
        int j1 = j + wd - 1, j2 = j - 1;
        int kol = pref[i1][j1] - pref[i2][j1] - pref[i1][j2] + pref[i2][j2];

        if (kol > 0) continue;

        pl[i][j]++; pl[i][j + wd]--;
        pl[i + ht][j]--; pl[i + ht][j + wd]++;

    }

    for (int i = 1; i <= n; i++){
        int cr = 0;
        for (int j = 1; j <= m; j++){
            cr += pl[i][j];
            vl[i][j] = cr;
        }
    }

    for (int j = 1; j <= m; j++){
        int cr = 0;
        for (int i = 1; i <= n; i++){
            cr += vl[i][j];
            if (a[i][j] == 1 && cr == 0)
                return 0;
        }
    }

    return 1;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("in.txt","r",stdin);
    cin >> n >> m;
    for (int i = 1; i <= n; i++)
    for (int j = 1; j <= m; j++){
        char c; cin >> c;
        a[i][j] = (c == '1' ? 1 : 0);
        pref[i][j] = (a[i][j] ^ 1) + pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1];
    }

    int wd = m;
    for (int ht = 1; ht <= n; ht++){
        while (wd > 0 && !ok(ht, wd))
            wd--;
        if (wd == 0) break;
        ans = max(ans, ht * wd);
    }

    cout << ans;

    return 0;
}

Subtask #1
41.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 632 KB Output is correct
3 Correct 46 ms 40568 KB Output is correct
4 Correct 50 ms 40568 KB Output is correct
5 Correct 14 ms 504 KB Output is correct
6 Correct 4 ms 376 KB Output is correct
7 Correct 2 ms 380 KB Output is correct
8 Correct 2 ms 632 KB Output is correct
9 Correct 2 ms 632 KB Output is correct
10 Correct 2 ms 632 KB Output is correct
11 Correct 2 ms 632 KB Output is correct
12 Correct 2 ms 632 KB Output is correct
13 Correct 2 ms 632 KB Output is correct
14 Correct 2 ms 632 KB Output is correct
15 Correct 2 ms 632 KB Output is correct
16 Correct 2 ms 632 KB Output is correct
17 Correct 4 ms 1528 KB Output is correct
18 Correct 4 ms 1528 KB Output is correct
19 Correct 5 ms 1916 KB Output is correct
20 Correct 6 ms 2168 KB Output is correct
21 Correct 4 ms 1272 KB Output is correct
22 Correct 5 ms 1784 KB Output is correct
23 Correct 7 ms 2168 KB Output is correct
24 Correct 5 ms 1784 KB Output is correct
25 Correct 8 ms 2168 KB Output is correct
26 Correct 7 ms 2168 KB Output is correct
27 Correct 69 ms 6392 KB Output is correct
28 Correct 102 ms 6904 KB Output is correct
29 Correct 220 ms 8752 KB Output is correct
30 Correct 345 ms 10488 KB Output is correct
31 Correct 239 ms 8268 KB Output is correct
32 Correct 242 ms 9520 KB Output is correct
33 Correct 408 ms 11000 KB Output is correct
34 Correct 57 ms 7544 KB Output is correct
35 Correct 269 ms 11000 KB Output is correct
36 Correct 350 ms 11020 KB Output is correct
37 Correct 2 ms 632 KB Output is correct
38 Execution timed out 1062 ms 100140 KB Time limit exceeded
39 Correct 2 ms 680 KB Output is correct
40 Execution timed out 1066 ms 27292 KB Time limit exceeded
41 Correct 2 ms 680 KB Output is correct
42 Correct 8 ms 2168 KB Output is correct
43 Execution timed out 1076 ms 100088 KB Time limit exceeded
44 Correct 516 ms 11020 KB Output is correct
45 Execution timed out 1073 ms 100408 KB Time limit exceeded
46 Execution timed out 1072 ms 100456 KB Time limit exceeded
47 Execution timed out 1057 ms 100364 KB Time limit exceeded
48 Execution timed out 1054 ms 100380 KB Time limit exceeded
49 Execution timed out 1049 ms 100480 KB Time limit exceeded
50 Execution timed out 1083 ms 100472 KB Time limit exceeded
51 Execution timed out 1067 ms 100444 KB Time limit exceeded
52 Execution timed out 1071 ms 100420 KB Time limit exceeded
53 Execution timed out 1018 ms 100716 KB Time limit exceeded
54 Execution timed out 1077 ms 101212 KB Time limit exceeded
55 Execution timed out 1078 ms 101496 KB Time limit exceeded
56 Execution timed out 1016 ms 101584 KB Time limit exceeded
57 Execution timed out 1083 ms 101500 KB Time limit exceeded
58 Execution timed out 1088 ms 101496 KB Time limit exceeded
59 Execution timed out 1077 ms 101724 KB Time limit exceeded
60 Execution timed out 1074 ms 101528 KB Time limit exceeded
61 Execution timed out 1084 ms 101604 KB Time limit exceeded
62 Execution timed out 1084 ms 101640 KB Time limit exceeded
63 Execution timed out 1083 ms 101620 KB Time limit exceeded
64 Execution timed out 1085 ms 101616 KB Time limit exceeded
65 Execution timed out 1076 ms 101660 KB Time limit exceeded
66 Execution timed out 1075 ms 101432 KB Time limit exceeded
67 Execution timed out 1070 ms 101568 KB Time limit exceeded
68 Execution timed out 1070 ms 101880 KB Time limit exceeded
69 Execution timed out 1074 ms 102416 KB Time limit exceeded
70 Execution timed out 1083 ms 81400 KB Time limit exceeded
71 Execution timed out 1090 ms 102392 KB Time limit exceeded
72 Execution timed out 1085 ms 102264 KB Time limit exceeded
73 Execution timed out 1078 ms 102236 KB Time limit exceeded
74 Execution timed out 1093 ms 101880 KB Time limit exceeded
75 Execution timed out 1063 ms 101656 KB Time limit exceeded
76 Execution timed out 1088 ms 101496 KB Time limit exceeded
77 Execution timed out 1090 ms 101312 KB Time limit exceeded
78 Execution timed out 1078 ms 101368 KB Time limit exceeded
79 Execution timed out 1064 ms 101440 KB Time limit exceeded
80 Execution timed out 1075 ms 101348 KB Time limit exceeded
81 Execution timed out 1082 ms 101240 KB Time limit exceeded
82 Execution timed out 1086 ms 101112 KB Time limit exceeded
83 Execution timed out 1082 ms 101240 KB Time limit exceeded
84 Execution timed out 1075 ms 100728 KB Time limit exceeded
85 Execution timed out 1080 ms 100856 KB Time limit exceeded
86 Execution timed out 1063 ms 100728 KB Time limit exceeded
87 Execution timed out 1090 ms 100600 KB Time limit exceeded
88 Execution timed out 1073 ms 100600 KB Time limit exceeded
89 Execution timed out 1069 ms 100832 KB Time limit exceeded
90 Execution timed out 1062 ms 81884 KB Time limit exceeded
91 Execution timed out 1071 ms 100344 KB Time limit exceeded
92 Execution timed out 1086 ms 100344 KB Time limit exceeded
93 Execution timed out 1061 ms 100332 KB Time limit exceeded
94 Execution timed out 1082 ms 100344 KB Time limit exceeded
95 Execution timed out 1065 ms 100216 KB Time limit exceeded
96 Execution timed out 1077 ms 100300 KB Time limit exceeded
97 Execution timed out 1040 ms 100212 KB Time limit exceeded
98 Execution timed out 1066 ms 100072 KB Time limit exceeded
99 Execution timed out 1076 ms 100212 KB Time limit exceeded
100 Execution timed out 1074 ms 99832 KB Time limit exceeded