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  1. //  A - Grid Compression
  2. #define DaAbyad ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  3. #include<bits/stdc++.h>
  4. using namespace std;
  5. const int N = 1e5 + 5, MOD = 1e9 + 7;
  6. const long long oo = 1e18 + 5;
  7. const long double pi = acos(-1);
  8. const long double eps = 1e-9;
  9. void open_file(string filename) {
  10.   freopen((filename + ".in").c_str(), "r", stdin);
  11.   freopen((filename + ".out").c_str(), "w", stdout);
  12. }
  13.  
  14. void Magic() {
  15.   int n, m;
  16.   cin >> n >> m;
  17.   char a[n][m];
  18.   bool goodRow[n], goodCol[m];
  19.   memset(goodRow, 0, sizeof goodRow);
  20.   memset(goodCol, 0, sizeof goodCol);
  21.   for (int i = 0; i < n; ++i) {
  22.     for (int j = 0; j < m; ++j) {
  23.       cin >> a[i][j];
  24.       if (a[i][j] == 'B') {
  25.         goodRow[i] = true;
  26.         goodCol[j] = true;
  27.       }
  28.     }
  29.   }
  30.  
  31.   for (int i = 0; i < n; ++i) {
  32.     if (goodRow[i]) {
  33.       for (int j = 0; j < m; ++j) {
  34.         if (goodCol[j]) {
  35.           cout << a[i][j];
  36.         }
  37.       }
  38.       cout << "\n";
  39.     }
  40.   }
  41. }
  42.  
  43. int main() {
  44.   DaAbyad
  45.   int tests = 1;
  46.   // cin >> tests;
  47.   while (tests--) {
  48.     Magic();
  49.   }
  50.   return 0;
  51. }
Success #stdin #stdout 0.01s 5288KB
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https://ideone.com/KmYsKZ
language:
C++14 (gcc 8.3)
created:
6 days ago
visibility:
public

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