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  1. #include <bits/stdc++.h>
  2.  
  3. #define ll long long 
  4. #define el cout << '\n'
  5.  
  6. using namespace std;
  7.  
  8. const int maxn = 1e3;
  9. const int INF = 1e9;
  10.  
  11. int n, m, h[maxn + 10], L[maxn + 10], R[maxn + 10];
  12. ll ans[maxn + 10][maxn + 10];
  13. char a[maxn + 10][maxn + 10];
  14. vector<int> st;
  15.  
  16. void solve(int x)
  17. {
  18.     st.clear();
  19.     st.push_back(0);
  20.     h[0] = h[m + 1] = -INF;
  21.     for (int i = 1; i <= m; i++)
  22.     {
  23.         h[i] = a[x][i] == '.' ? h[i] + 1 :  0;
  24.         while (h[i] <= h[st.back()])
  25.             st.pop_back();
  26.         L[i] = st.back();
  27.         st.push_back(i);
  28.     }
  29.     st.clear();
  30.     st.push_back(m + 1);
  31.     for (int i = m; i >= 1; i--)
  32.     {
  33.         while (h[i] < h[st.back()])
  34.             st.pop_back();
  35.         R[i] = st.back();
  36.         st.push_back(i);
  37.     }
  38.     for (int i = 1; i <= m; i++)
  39.     {
  40.         int A = min(i - L[i], R[i] - i);
  41.         int B = max(i - L[i], R[i] - i);
  42.         ans[h[i]][1]++;
  43.         ans[h[i]][A + 1]--;
  44.         ans[h[i]][B + 1]--;
  45.         ans[h[i]][A + B + 1]++;
  46.     }
  47. }
  48.  
  49. int main()
  50. {
  51.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  52.     if (fopen("MAXIMUM.INP", "r"))
  53.     {
  54.         freopen("MAXIMUM.INP", "r", stdin);
  55.         freopen("MAXIMUM.OUT", "w", stdout);
  56.     }
  57.  
  58.     cin >> n >> m;
  59.     for (int i = 1; i <= n; i++)
  60.         for (int j = 1; j <= m; j++)
  61.             cin >> a[i][j];
  62.     for (int i = 1; i <= n; i++)
  63.         solve(i);
  64.     for (int i = 1; i <= n; i++)
  65.     {
  66.         for (int j = 1; j <= m; j++)
  67.             ans[i][j] += ans[i][j - 1];
  68.         for (int j = 1; j <= m; j++)
  69.             ans[i][j] += ans[i][j - 1];
  70.     }
  71.     for (int j = 1; j <= m; j++)
  72.         for (int i = n; i >= 1; i--)
  73.             ans[i][j] += ans[i + 1][j];
  74.     for (int i = 1; i <= n; i++)
  75.     {
  76.         for (int j = 1; j <= m; j++)
  77.             cout << ans[i][j] << ' ';
  78.         el;
  79.     }
  80. }
Success #stdin #stdout 0.01s 5272KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
https://ideone.com/SJ1nxa
language:
C++14 (gcc 8.3)
created:
9 days ago
visibility:
public

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