oj.uz

Submission #833217

# Submission time Handle Problem Language Result Execution time Memory
833217 2023-08-22T03:17:35 Z vjudge1 Bomb (IZhO17_bomb) C++17
15 / 100
 1000 ms 74112 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');
  const int INF = 1e9;
  int h = INF;
  {
    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];
      }
    }
    int w = INF;
    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))) {
        w = min(w, b[i][j]);
      }
    }
    if(w != INF) ans = max(ans, hh * w);
  }
  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
15.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 212 KB Output isn't correct
2 Correct 0 ms 212 KB Output is 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 Correct 0 ms 212 KB Output is correct
9 Incorrect 0 ms 212 KB Output isn't 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 Correct 1 ms 212 KB Output is correct
14 Incorrect 0 ms 212 KB Output isn't correct
15 Correct 0 ms 212 KB Output is correct
16 Incorrect 0 ms 212 KB Output isn't correct
17 Incorrect 0 ms 340 KB Output isn't correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Incorrect 1 ms 340 KB Output isn't correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Incorrect 1 ms 340 KB Output isn't correct
24 Incorrect 1 ms 340 KB Output isn't correct
25 Incorrect 1 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 Correct 5 ms 1560 KB Output is correct
29 Incorrect 34 ms 1760 KB Output isn't correct
30 Incorrect 66 ms 2552 KB Output isn't correct
31 Incorrect 34 ms 2124 KB Output isn't correct
32 Incorrect 52 ms 2180 KB Output isn't correct
33 Incorrect 89 ms 2736 KB Output isn't correct
34 Correct 4 ms 1300 KB Output is correct
35 Incorrect 16 ms 2748 KB Output isn't correct
36 Incorrect 39 ms 2736 KB Output isn't correct
37 Incorrect 0 ms 212 KB Output isn't correct
38 Execution timed out 1094 ms 73928 KB Time limit exceeded
39 Incorrect 0 ms 212 KB Output isn't correct
40 Incorrect 860 ms 9448 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 1087 ms 73916 KB Time limit exceeded
44 Incorrect 129 ms 2716 KB Output isn't correct
45 Execution timed out 1101 ms 73876 KB Time limit exceeded
46 Execution timed out 1086 ms 73924 KB Time limit exceeded
47 Execution timed out 1084 ms 73916 KB Time limit exceeded
48 Execution timed out 1090 ms 73912 KB Time limit exceeded
49 Incorrect 415 ms 73988 KB Output isn't correct
50 Execution timed out 1087 ms 73876 KB Time limit exceeded
51 Execution timed out 1085 ms 73956 KB Time limit exceeded
52 Execution timed out 1076 ms 73880 KB Time limit exceeded
53 Execution timed out 1072 ms 73876 KB Time limit exceeded
54 Execution timed out 1091 ms 73872 KB Time limit exceeded
55 Execution timed out 1070 ms 73872 KB Time limit exceeded
56 Execution timed out 1091 ms 73960 KB Time limit exceeded
57 Execution timed out 1086 ms 73920 KB Time limit exceeded
58 Execution timed out 1085 ms 73928 KB Time limit exceeded
59 Execution timed out 1089 ms 73940 KB Time limit exceeded
60 Execution timed out 1075 ms 73928 KB Time limit exceeded
61 Incorrect 966 ms 73892 KB Output isn't correct
62 Execution timed out 1089 ms 73876 KB Time limit exceeded
63 Execution timed out 1092 ms 73956 KB Time limit exceeded
64 Execution timed out 1081 ms 73916 KB Time limit exceeded
65 Execution timed out 1091 ms 73912 KB Time limit exceeded
66 Incorrect 569 ms 74048 KB Output isn't correct
67 Execution timed out 1077 ms 73892 KB Time limit exceeded
68 Execution timed out 1084 ms 73964 KB Time limit exceeded
69 Execution timed out 1076 ms 73872 KB Time limit exceeded
70 Execution timed out 1087 ms 47400 KB Time limit exceeded
71 Execution timed out 1081 ms 73876 KB Time limit exceeded
72 Execution timed out 1082 ms 73876 KB Time limit exceeded
73 Execution timed out 1092 ms 73968 KB Time limit exceeded
74 Execution timed out 1080 ms 73872 KB Time limit exceeded
75 Execution timed out 1084 ms 74012 KB Time limit exceeded
76 Execution timed out 1086 ms 73912 KB Time limit exceeded
77 Execution timed out 1080 ms 73876 KB Time limit exceeded
78 Execution timed out 1077 ms 73956 KB Time limit exceeded
79 Execution timed out 1066 ms 73932 KB Time limit exceeded
80 Execution timed out 1086 ms 74112 KB Time limit exceeded
81 Execution timed out 1085 ms 73956 KB Time limit exceeded
82 Execution timed out 1083 ms 73888 KB Time limit exceeded
83 Execution timed out 1090 ms 73928 KB Time limit exceeded
84 Incorrect 973 ms 74044 KB Output isn't correct
85 Execution timed out 1075 ms 73956 KB Time limit exceeded
86 Execution timed out 1090 ms 73976 KB Time limit exceeded
87 Execution timed out 1091 ms 73972 KB Time limit exceeded
88 Execution timed out 1084 ms 73916 KB Time limit exceeded
89 Execution timed out 1084 ms 73956 KB Time limit exceeded
90 Execution timed out 1089 ms 47424 KB Time limit exceeded
91 Execution timed out 1089 ms 73916 KB Time limit exceeded
92 Execution timed out 1085 ms 74004 KB Time limit exceeded
93 Execution timed out 1084 ms 73916 KB Time limit exceeded
94 Execution timed out 1098 ms 73956 KB Time limit exceeded
95 Execution timed out 1093 ms 73960 KB Time limit exceeded
96 Execution timed out 1089 ms 73932 KB Time limit exceeded
97 Execution timed out 1085 ms 73928 KB Time limit exceeded
98 Execution timed out 1094 ms 73956 KB Time limit exceeded
99 Execution timed out 1090 ms 73960 KB Time limit exceeded
100 Execution timed out 1091 ms 73920 KB Time limit exceeded