oj.uz

Submission #833634

# Submission time Handle Problem Language Result Execution time Memory
833634 2023-08-22T07:17:33 Z vjudge1 Bomb (IZhO17_bomb) C++17
28 / 100
 1000 ms 74092 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) {
    string s; cin >> s;
    for(int i = 0; i < m; i++) {
      v[i] = s[i] - '0';
      ok |= v[i];
    }
  }
  if(!ok) return void(cout << 0 << '\n');
  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 > 0) pref[i][j] += pref[i-1][j];
      if(j > 0) 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 > 0) ans -= pref[i1-1][j2];
    if(j1 > 0) ans -= pref[i2][j1-1];
    if(i1 > 0 && j1 > 0) ans += pref[i1-1][j1-1];
    return ans;
  };
  int ans = 0;
  vector b(n, vector<int>(m));
  for(int h = 1; h <= n; h++) {
    for(int w = 1; w <= m; w++) {
      debug(cerr << "h = " << h << " w = " << w << '\n');
      for(int i = 0; i+h-1 < n; i++) {
        for(int j = 0; j+w-1 < m; j++) {
          if(get(i, j, i+h-1, j+w-1) == h * w) {
            debug(cerr << i << ' ' << j << '\n');
            for(int ii = i; ii < i+h; ii++) {
              for(int jj = j; jj < j+w; jj++) {
                b[ii][jj] = 1;
              }
            }
          }
        }
      }
      if(a == b) ans = max(ans, h * w);
      debug({
        for(int i = 0; i+h-1 < n; i++) {
          for(int j = 0; j+w-1 < m; j++)
            cerr << b[i][j];
          cerr << '\n';
        }
      });
      for(int i = 0; i+h-1 < n; i++) {
        for(int j = 0; j+w-1 < m; j++)
          b[i][j] = 0;
      }
    }
  }
  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
28.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 712 ms 724 KB Output is correct
4 Correct 272 ms 724 KB Output is correct
5 Correct 42 ms 340 KB Output is correct
6 Correct 28 ms 212 KB Output is correct
7 Correct 1 ms 212 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 1 ms 212 KB Output is correct
10 Correct 1 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 Incorrect 1 ms 212 KB Output isn't correct
14 Correct 1 ms 212 KB Output is correct
15 Correct 1 ms 212 KB Output is correct
16 Correct 1 ms 212 KB Output is correct
17 Correct 10 ms 340 KB Output is correct
18 Correct 9 ms 340 KB Output is correct
19 Correct 26 ms 340 KB Output is correct
20 Correct 34 ms 340 KB Output is correct
21 Correct 11 ms 340 KB Output is correct
22 Correct 23 ms 340 KB Output is correct
23 Correct 64 ms 424 KB Output is correct
24 Correct 20 ms 400 KB Output is correct
25 Correct 112 ms 424 KB Output is correct
26 Execution timed out 1073 ms 340 KB Time limit exceeded
27 Execution timed out 1046 ms 1236 KB Time limit exceeded
28 Execution timed out 1049 ms 1620 KB Time limit exceeded
29 Execution timed out 1044 ms 1748 KB Time limit exceeded
30 Execution timed out 1043 ms 2516 KB Time limit exceeded
31 Execution timed out 1047 ms 2004 KB Time limit exceeded
32 Execution timed out 1060 ms 2132 KB Time limit exceeded
33 Execution timed out 1061 ms 2644 KB Time limit exceeded
34 Execution timed out 1051 ms 1236 KB Time limit exceeded
35 Execution timed out 1050 ms 2644 KB Time limit exceeded
36 Execution timed out 1046 ms 2644 KB Time limit exceeded
37 Correct 0 ms 212 KB Output is correct
38 Execution timed out 1095 ms 73932 KB Time limit exceeded
39 Correct 1 ms 212 KB Output is correct
40 Execution timed out 1051 ms 9428 KB Time limit exceeded
41 Correct 1 ms 212 KB Output is correct
42 Correct 777 ms 424 KB Output is correct
43 Execution timed out 1044 ms 73928 KB Time limit exceeded
44 Execution timed out 1061 ms 2644 KB Time limit exceeded
45 Execution timed out 1066 ms 73932 KB Time limit exceeded
46 Execution timed out 1068 ms 73928 KB Time limit exceeded
47 Execution timed out 1049 ms 73916 KB Time limit exceeded
48 Execution timed out 1047 ms 73916 KB Time limit exceeded
49 Execution timed out 1076 ms 73932 KB Time limit exceeded
50 Execution timed out 1052 ms 73932 KB Time limit exceeded
51 Execution timed out 1060 ms 73932 KB Time limit exceeded
52 Execution timed out 1053 ms 73928 KB Time limit exceeded
53 Execution timed out 1052 ms 73924 KB Time limit exceeded
54 Execution timed out 1062 ms 73932 KB Time limit exceeded
55 Execution timed out 1027 ms 74092 KB Time limit exceeded
56 Execution timed out 1067 ms 73976 KB Time limit exceeded
57 Execution timed out 1049 ms 73932 KB Time limit exceeded
58 Execution timed out 1031 ms 73928 KB Time limit exceeded
59 Execution timed out 1072 ms 73928 KB Time limit exceeded
60 Execution timed out 1066 ms 73912 KB Time limit exceeded
61 Execution timed out 1048 ms 73912 KB Time limit exceeded
62 Execution timed out 1083 ms 73908 KB Time limit exceeded
63 Execution timed out 1049 ms 73932 KB Time limit exceeded
64 Execution timed out 1071 ms 73992 KB Time limit exceeded
65 Execution timed out 1049 ms 73928 KB Time limit exceeded
66 Execution timed out 1048 ms 73940 KB Time limit exceeded
67 Execution timed out 1051 ms 73916 KB Time limit exceeded
68 Execution timed out 1085 ms 73916 KB Time limit exceeded
69 Execution timed out 1049 ms 73908 KB Time limit exceeded
70 Execution timed out 1045 ms 47444 KB Time limit exceeded
71 Execution timed out 1046 ms 73932 KB Time limit exceeded
72 Execution timed out 1038 ms 73932 KB Time limit exceeded
73 Execution timed out 1072 ms 73932 KB Time limit exceeded
74 Execution timed out 1066 ms 73912 KB Time limit exceeded
75 Execution timed out 1075 ms 74000 KB Time limit exceeded
76 Execution timed out 1026 ms 73928 KB Time limit exceeded
77 Execution timed out 1042 ms 74012 KB Time limit exceeded
78 Execution timed out 1043 ms 73916 KB Time limit exceeded
79 Execution timed out 1069 ms 73932 KB Time limit exceeded
80 Execution timed out 1062 ms 73932 KB Time limit exceeded
81 Execution timed out 1042 ms 73932 KB Time limit exceeded
82 Execution timed out 1063 ms 73924 KB Time limit exceeded
83 Execution timed out 1074 ms 73904 KB Time limit exceeded
84 Execution timed out 1063 ms 73912 KB Time limit exceeded
85 Execution timed out 1069 ms 73928 KB Time limit exceeded
86 Execution timed out 1041 ms 73908 KB Time limit exceeded
87 Execution timed out 1083 ms 73928 KB Time limit exceeded
88 Execution timed out 1073 ms 73944 KB Time limit exceeded
89 Execution timed out 1071 ms 73920 KB Time limit exceeded
90 Execution timed out 1059 ms 47432 KB Time limit exceeded
91 Execution timed out 1064 ms 73940 KB Time limit exceeded
92 Execution timed out 1071 ms 73932 KB Time limit exceeded
93 Execution timed out 1067 ms 73996 KB Time limit exceeded
94 Execution timed out 1049 ms 73932 KB Time limit exceeded
95 Execution timed out 1049 ms 73932 KB Time limit exceeded
96 Execution timed out 1064 ms 73932 KB Time limit exceeded
97 Execution timed out 1052 ms 73932 KB Time limit exceeded
98 Execution timed out 1095 ms 73912 KB Time limit exceeded
99 Execution timed out 1034 ms 73924 KB Time limit exceeded
100 Execution timed out 1049 ms 73916 KB Time limit exceeded