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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int n, m, table[21][21], erase_col = 0, prime_nrs = 0, mc;
  5.  
  6. int prime(int n) {
  7.     if(n < 2) {
  8.         return 0;
  9.     }
  10.     for(int d = 2; d * d <= n; ++d) {
  11.         if(n % d == 0) {
  12.             return 0;
  13.         }
  14.     }
  15.     return 1;
  16. }
  17.  
  18. int main() {
  19.     cin >> n >> m;
  20.     mc = m;
  21.     for (int i = 0; i < n; ++i) {
  22.         for (int j = 0; j < m; ++j) {
  23.             cin >> table[i][j];
  24.         }
  25.     }
  26.     for (int j = 0; j < m; ++j) {
  27.         prime_nrs = 0;
  28.         for (int i = 0; i < n; ++i) {
  29.             if (prime(table[i][j]) == 1) {
  30.                 ++prime_nrs;
  31.             }
  32.         }
  33.         if (prime_nrs == n && n > 1) {
  34.             int line;
  35.             erase_col = 1;
  36.             for (line = 0; line < n - 1; ++line) {
  37.                 if (table[line][j] >= table[line + 1][j]) {
  38.                     erase_col = 0;
  39.                 }
  40.             }
  41.             if (erase_col == 1) {
  42.                 for (line = 0; line < n; ++line) {
  43.                     table[line][j] = -1;
  44.                 }
  45.                 --mc;
  46.             }
  47.         }
  48.     }
  49.     cout << n << ' ' << mc << '\n';
  50.     for (int i = 0; i < n; ++i) {
  51.         for (int j = 0; j < m; ++j) {
  52.             if (table[i][j] != -1) {
  53.             	cout << table[i][j] << ' ';	
  54.             }
  55.         }
  56.         cout << '\n';
  57.     }
  58.     return 0;
  59. }
Success #stdin #stdout 0.01s 5476KB
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https://ideone.com/lWlcXt
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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