oj.uz

Submission #706354

# Submission time Handle Problem Language Result Execution time Memory
706354 2023-03-06T10:21:41 Z KiriLL1ca Bomb (IZhO17_bomb) C++17
76 / 100
 734 ms 56300 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define fr first
#define sc second
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define endl '\n'
#define sz(x) (int)((x).size())
#define vec vector
#define pw(x) (1ll << x)

using namespace std;
using namespace __gnu_pbds;

template <typename T> inline bool umin (T &a, const T &b) { if (a > b) { a = b; return 1; } return 0; }
template <typename T> inline bool umax (T &a, const T &b) { if (a < b) { a = b; return 1; } return 0; }

typedef long double ld;
typedef long long ll;
typedef unsigned long long ull;
typedef pair <int, int> pii;
typedef pair <ll, ll> pll;

const int inf = 1e9 + 17;

inline void solve () {
    int n, m; cin >> n >> m;
    vec <string> a (n);
    for (auto &i : a) cin >> i;

    vec <int> mx (m + 2, inf);

    for (int iter = 0; iter < 2; ++iter) {
        vec <vec <int>> p (n, vec <int> (m)), s (n, vec <int> (m));
        for (int j = 0; j < m; ++j) {
            p[0][j] = (a[0][j] == '1');
            for (int i = 1; i < n; ++i) {
                if (a[i][j] == '1') p[i][j] = p[i - 1][j] + 1;
            }

            s[n - 1][j] = (a[n - 1][j] == '1');
            for (int i = n - 2; ~i; --i) {
                if (a[i][j] == '1') s[i][j] = s[i + 1][j] + 1;
            }

            for (int i = 0; i < n; ++i) if (a[i][j] == '1') umin(mx[1], p[i][j] + s[i][j] - 1);
        }

        for (int i = 0; i < n; ++i) {
            for (int l = 0, r = 0; r < m; ) {
                while (r < m && a[i][r] == '1') ++r;
                if (l == r) {
                    ++l, ++r;
                    continue;
                }

                int mn_down = inf, mn_up = inf;
                for (int q = l; q < r; ++q) {
                    umin(mn_up, p[i][q]);
                    umin(mn_down, s[i][q]);
                    umin(mx[q - l + 1], mn_down + mn_up - 1);
                }
                umin(mx[r - l + 1], 0);

                l = r;
            }
        }

        for (auto &i : a) reverse(all(i));
    }

    int ans = 0;
    bool ok = 0;
    for (int i = 1; i <= m; ++i) {
        umin(mx[i], mx[i - 1]);
        if (i > 1 && mx[i] != mx[i - 1] && mx[i] > 0) ok = 1;
        umax(ans, mx[i] * i);
    }
    assert(ok);
    cout << ans << endl;
}

signed main () {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #ifdef LOCAL
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif// LOCAL
    int t = 1; //cin >> t;
    while (t--) solve();
    return 0;
}

Subtask #1
76.0 / 100.0

# Verdict Execution time Memory Grader output
1 Runtime error 1 ms 468 KB Execution killed with signal 6
2 Runtime error 1 ms 468 KB Execution killed with signal 6
3 Runtime error 2 ms 1108 KB Execution killed with signal 6
4 Runtime error 2 ms 1108 KB Execution killed with signal 6
5 Runtime error 1 ms 468 KB Execution killed with signal 6
6 Runtime error 1 ms 468 KB Execution killed with signal 6
7 Runtime error 1 ms 468 KB Execution killed with signal 6
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 212 KB Output is correct
10 Correct 0 ms 212 KB Output is correct
11 Correct 0 ms 212 KB Output is correct
12 Correct 0 ms 212 KB Output is correct
13 Runtime error 1 ms 468 KB Execution killed with signal 6
14 Runtime error 1 ms 468 KB Execution killed with signal 6
15 Correct 0 ms 212 KB Output is correct
16 Runtime error 1 ms 468 KB Execution killed with signal 6
17 Runtime error 1 ms 596 KB Execution killed with signal 6
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Runtime error 1 ms 596 KB Execution killed with signal 6
27 Runtime error 3 ms 980 KB Execution killed with signal 6
28 Correct 2 ms 1240 KB Output is correct
29 Correct 4 ms 1380 KB Output is correct
30 Correct 5 ms 2004 KB Output is correct
31 Correct 3 ms 1620 KB Output is correct
32 Correct 5 ms 1644 KB Output is correct
33 Correct 5 ms 2132 KB Output is correct
34 Correct 2 ms 1040 KB Output is correct
35 Correct 5 ms 2132 KB Output is correct
36 Runtime error 7 ms 2132 KB Execution killed with signal 6
37 Correct 1 ms 212 KB Output is correct
38 Runtime error 666 ms 56164 KB Execution killed with signal 6
39 Correct 0 ms 212 KB Output is correct
40 Correct 41 ms 7252 KB Output is correct
41 Correct 0 ms 212 KB Output is correct
42 Correct 1 ms 340 KB Output is correct
43 Runtime error 504 ms 56168 KB Execution killed with signal 6
44 Correct 6 ms 2132 KB Output is correct
45 Correct 473 ms 56192 KB Output is correct
46 Runtime error 472 ms 56208 KB Execution killed with signal 6
47 Correct 480 ms 56212 KB Output is correct
48 Correct 433 ms 56160 KB Output is correct
49 Runtime error 632 ms 56104 KB Execution killed with signal 6
50 Correct 470 ms 56192 KB Output is correct
51 Correct 473 ms 56280 KB Output is correct
52 Correct 512 ms 56244 KB Output is correct
53 Correct 467 ms 56220 KB Output is correct
54 Correct 329 ms 56152 KB Output is correct
55 Correct 332 ms 56196 KB Output is correct
56 Runtime error 631 ms 56220 KB Execution killed with signal 6
57 Correct 296 ms 56188 KB Output is correct
58 Correct 340 ms 56192 KB Output is correct
59 Correct 308 ms 56256 KB Output is correct
60 Runtime error 450 ms 56228 KB Execution killed with signal 6
61 Runtime error 708 ms 56164 KB Execution killed with signal 6
62 Runtime error 734 ms 56160 KB Execution killed with signal 6
63 Runtime error 723 ms 56164 KB Execution killed with signal 6
64 Runtime error 393 ms 56164 KB Execution killed with signal 6
65 Correct 469 ms 56176 KB Output is correct
66 Correct 483 ms 56164 KB Output is correct
67 Correct 568 ms 56204 KB Output is correct
68 Correct 541 ms 56160 KB Output is correct
69 Correct 360 ms 56196 KB Output is correct
70 Correct 129 ms 36116 KB Output is correct
71 Correct 293 ms 56240 KB Output is correct
72 Correct 320 ms 56200 KB Output is correct
73 Correct 372 ms 56204 KB Output is correct
74 Correct 375 ms 56168 KB Output is correct
75 Correct 391 ms 56172 KB Output is correct
76 Correct 382 ms 56248 KB Output is correct
77 Correct 387 ms 56200 KB Output is correct
78 Correct 415 ms 56104 KB Output is correct
79 Correct 205 ms 56176 KB Output is correct
80 Correct 215 ms 56192 KB Output is correct
81 Correct 253 ms 56156 KB Output is correct
82 Correct 403 ms 56268 KB Output is correct
83 Correct 405 ms 56164 KB Output is correct
84 Correct 234 ms 56164 KB Output is correct
85 Correct 407 ms 56192 KB Output is correct
86 Correct 671 ms 56164 KB Output is correct
87 Correct 381 ms 56300 KB Output is correct
88 Correct 390 ms 56244 KB Output is correct
89 Correct 467 ms 56164 KB Output is correct
90 Correct 203 ms 36116 KB Output is correct
91 Correct 430 ms 56164 KB Output is correct
92 Correct 469 ms 56268 KB Output is correct
93 Correct 638 ms 56160 KB Output is correct
94 Correct 481 ms 56280 KB Output is correct
95 Correct 363 ms 56292 KB Output is correct
96 Correct 382 ms 56248 KB Output is correct
97 Correct 644 ms 56216 KB Output is correct
98 Correct 379 ms 56164 KB Output is correct
99 Correct 450 ms 56220 KB Output is correct
100 Correct 647 ms 56184 KB Output is correct