oj.uz

Submission #833207

# Submission time Handle Problem Language Result Execution time Memory
833207 2023-08-22T03:12:51 Z vjudge1 Bomb (IZhO17_bomb) C++17
3 / 100
 1000 ms 74032 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
// using ld = long double;
#define all(x) begin(x), end(x)
#ifdef LOCAL
#define debug(...) __VA_ARGS__;
#else
#define debug(...)
#endif

template<class A, class B> ostream& operator<<(ostream& os, const pair<A, B> &p);
template<class T> ostream& operator<<(ostream& os, const vector<T> &v);
template<class T, size_t N> ostream& operator<<(ostream& os, const array<T, N> &v);

template<class A, class B>
ostream& operator<<(ostream& os, const pair<A, B> &p) {
  return os << '(' << p.first << ',' << p.second << ')';
}
 
template<class T>
ostream& operator<<(ostream& os, const vector<T> &v) {
  os << '{'; bool fs = 1;
  for(auto &i : v) { if(!fs) os << ','; os << i; fs = 0; }
  return os << '}';
}

template<class T, size_t N>
ostream& operator<<(ostream& os, const array<T, N> &v) {
  os << '{'; bool fs = 1;
  for(auto &i : v) { if(!fs) os << ','; os << i; fs = 0; }
  return os << '}';
}

void init() {
}
 
void solve(int tt = 0) {
  int n, m; cin >> n >> m;
  vector a(n, vector<int>(m));
  bool ok = 0;
  for(auto &v : a) for(int &i : v) {
    char c; cin >> c;
    i = c - '0';
    ok |= i;
  }
  if(!ok) return void(cout << 0 << '\n');
  int h = 1e9, w = 1e9;
  {
    vector b = a;
    for(int i = 1; i < n; i++) {
      for(int j = 0; j < m; j++) {
        if(b[i][j] != 0) {
          b[i][j] += b[i-1][j];
        }
      }
    }
    debug({
      for(int i = 0; i < n; i++) {
        for(int j = 0; j < m; j++)
          cerr << b[i][j];
        cerr << '\n';
      }
    });
    for(int i = 0; i < n; i++) {
      for(int j = 0; j < m; j++) if(b[i][j] != 0 && (i == n-1 || (i < n-1 && b[i+1][j] == 0))) {
        h = min(h, b[i][j]);
      }
    }
  }

  vector pref(n, vector<int>(m));
  for(int i = 0; i < n; i++) {
    for(int j = 0; j < m; j++) {
      pref[i][j] = a[i][j];
      if(i) pref[i][j] += pref[i-1][j];
      if(j) pref[i][j] += pref[i][j-1];
      if(i > 0 && j > 0) pref[i][j] -= pref[i-1][j-1];
    }
  }
  const auto get = [&](int i1, int j1, int i2, int j2) -> int {
    int ans = pref[i2][j2];
    if(i1) ans -= pref[i1-1][j2];
    if(j1) ans -= pref[i2][j1-1];
    if(i1 && j1) ans += pref[i1-1][j1-1];
    return ans;
  };

  int ans = 0;
  vector b(n, vector<int>(m));
  for(int hh = 1; hh <= h; hh++) {
    for(int i = 0; i+hh-1 < n; i++) {
      for(int j = 0; j < m; j++) {
        b[i][j] = (get(i, j, i+hh-1, j) == hh);
      }
    }
    for(int j = 1; j < m; j++) {
      for(int i = 0; i+hh-1 < n; i++) {
        b[i][j] += b[i][j-1];
      }
    }
    for(int i = 0; i+hh-1 < n; i++) {
      for(int j = 0; j < m; j++) if(b[i][j] != 0 && (j == m-1 || (j < m-1 && b[i][j+1] == 0))) {
        ans = max(ans, h * w);
        w = min(w, b[i][j]);
      }
    }
  }
  cout << ans << '\n';
}

void reset() {
}
 
int main() {
  ios::sync_with_stdio(0); cin.tie(0);
  int t = 1; // cin >> t;
  init();
  for(int i = 1; i <= t; i++) solve(i), reset();
  return 0;
}

Subtask #1
3.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Incorrect 0 ms 212 KB Output isn't correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 724 KB Output is correct
5 Incorrect 0 ms 340 KB Output isn't correct
6 Incorrect 0 ms 212 KB Output isn't correct
7 Incorrect 0 ms 212 KB Output isn't correct
8 Incorrect 0 ms 212 KB Output isn't correct
9 Incorrect 0 ms 212 KB Output isn't correct
10 Incorrect 0 ms 212 KB Output isn't correct
11 Incorrect 0 ms 212 KB Output isn't correct
12 Incorrect 0 ms 212 KB Output isn't correct
13 Incorrect 0 ms 212 KB Output isn't correct
14 Incorrect 0 ms 212 KB Output isn't correct
15 Incorrect 0 ms 212 KB Output isn't correct
16 Incorrect 1 ms 256 KB Output isn't correct
17 Correct 1 ms 464 KB Output is correct
18 Incorrect 0 ms 340 KB Output isn't correct
19 Incorrect 1 ms 340 KB Output isn't correct
20 Incorrect 1 ms 340 KB Output isn't correct
21 Incorrect 1 ms 340 KB Output isn't correct
22 Incorrect 1 ms 340 KB Output isn't correct
23 Incorrect 1 ms 388 KB Output isn't correct
24 Incorrect 1 ms 340 KB Output isn't correct
25 Incorrect 2 ms 340 KB Output isn't correct
26 Incorrect 1 ms 340 KB Output isn't correct
27 Incorrect 2 ms 1172 KB Output isn't correct
28 Incorrect 5 ms 1560 KB Output isn't correct
29 Incorrect 35 ms 1760 KB Output isn't correct
30 Incorrect 69 ms 2660 KB Output isn't correct
31 Incorrect 34 ms 2048 KB Output isn't correct
32 Incorrect 53 ms 2148 KB Output isn't correct
33 Incorrect 96 ms 2736 KB Output isn't correct
34 Incorrect 4 ms 1300 KB Output isn't correct
35 Incorrect 16 ms 2736 KB Output isn't correct
36 Incorrect 40 ms 2736 KB Output isn't correct
37 Incorrect 0 ms 212 KB Output isn't correct
38 Execution timed out 1094 ms 73912 KB Time limit exceeded
39 Incorrect 1 ms 212 KB Output isn't correct
40 Incorrect 881 ms 9460 KB Output isn't correct
41 Incorrect 0 ms 212 KB Output isn't correct
42 Incorrect 2 ms 340 KB Output isn't correct
43 Execution timed out 1090 ms 73972 KB Time limit exceeded
44 Incorrect 138 ms 2736 KB Output isn't correct
45 Execution timed out 1077 ms 73916 KB Time limit exceeded
46 Execution timed out 1091 ms 73880 KB Time limit exceeded
47 Execution timed out 1040 ms 73880 KB Time limit exceeded
48 Execution timed out 1050 ms 73956 KB Time limit exceeded
49 Incorrect 449 ms 74000 KB Output isn't correct
50 Execution timed out 1063 ms 73872 KB Time limit exceeded
51 Execution timed out 1065 ms 74004 KB Time limit exceeded
52 Execution timed out 1099 ms 73956 KB Time limit exceeded
53 Execution timed out 1088 ms 73944 KB Time limit exceeded
54 Execution timed out 1073 ms 73956 KB Time limit exceeded
55 Execution timed out 1090 ms 73972 KB Time limit exceeded
56 Execution timed out 1097 ms 73872 KB Time limit exceeded
57 Execution timed out 1083 ms 73864 KB Time limit exceeded
58 Execution timed out 1060 ms 73956 KB Time limit exceeded
59 Execution timed out 1096 ms 73884 KB Time limit exceeded
60 Execution timed out 1033 ms 73880 KB Time limit exceeded
61 Execution timed out 1027 ms 73988 KB Time limit exceeded
62 Execution timed out 1083 ms 73884 KB Time limit exceeded
63 Execution timed out 1040 ms 73960 KB Time limit exceeded
64 Execution timed out 1087 ms 73964 KB Time limit exceeded
65 Execution timed out 1089 ms 73892 KB Time limit exceeded
66 Incorrect 587 ms 73992 KB Output isn't correct
67 Execution timed out 1081 ms 73924 KB Time limit exceeded
68 Execution timed out 1036 ms 73956 KB Time limit exceeded
69 Execution timed out 1052 ms 73984 KB Time limit exceeded
70 Execution timed out 1059 ms 47476 KB Time limit exceeded
71 Execution timed out 1079 ms 73956 KB Time limit exceeded
72 Execution timed out 1052 ms 73892 KB Time limit exceeded
73 Execution timed out 1070 ms 73956 KB Time limit exceeded
74 Execution timed out 1042 ms 73876 KB Time limit exceeded
75 Execution timed out 1060 ms 73908 KB Time limit exceeded
76 Execution timed out 1077 ms 73888 KB Time limit exceeded
77 Execution timed out 1062 ms 73952 KB Time limit exceeded
78 Execution timed out 1076 ms 73928 KB Time limit exceeded
79 Execution timed out 1094 ms 73956 KB Time limit exceeded
80 Execution timed out 1059 ms 73880 KB Time limit exceeded
81 Execution timed out 1049 ms 73976 KB Time limit exceeded
82 Execution timed out 1060 ms 73880 KB Time limit exceeded
83 Execution timed out 1048 ms 73876 KB Time limit exceeded
84 Incorrect 957 ms 73988 KB Output isn't correct
85 Execution timed out 1097 ms 73976 KB Time limit exceeded
86 Execution timed out 1040 ms 73976 KB Time limit exceeded
87 Execution timed out 1027 ms 73876 KB Time limit exceeded
88 Execution timed out 1065 ms 73916 KB Time limit exceeded
89 Execution timed out 1067 ms 73916 KB Time limit exceeded
90 Execution timed out 1093 ms 47424 KB Time limit exceeded
91 Execution timed out 1052 ms 74032 KB Time limit exceeded
92 Execution timed out 1027 ms 73924 KB Time limit exceeded
93 Execution timed out 1057 ms 73916 KB Time limit exceeded
94 Execution timed out 1050 ms 73956 KB Time limit exceeded
95 Execution timed out 1044 ms 73956 KB Time limit exceeded
96 Execution timed out 1046 ms 73956 KB Time limit exceeded
97 Execution timed out 1051 ms 73920 KB Time limit exceeded
98 Execution timed out 1056 ms 73980 KB Time limit exceeded
99 Execution timed out 1044 ms 73912 KB Time limit exceeded
100 Execution timed out 1059 ms 73920 KB Time limit exceeded