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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4. #include <random>
  5. #include <chrono>
  6. using namespace std;
  7. int main() {
  8.     ios_base::sync_with_stdio(0); cin.tie(0);
  9.     mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
  10.     vector<vector<int>> m(10, vector<int>(10));
  11.     for (int i = 0; i < 10; ++i) {
  12.         for (int j = 0; j < 10; ++j) {
  13.             if (!(cin >> m[i][j])) return 0;
  14.         }
  15.     }
  16.     for (int i = 0; i < 10; ++i) {
  17.         shuffle(m[i].begin(), m[i].end(), rng);
  18.     }
  19.     int do_usuniecia = uniform_int_distribution<int>(0, 2)(rng);
  20.     while (do_usuniecia > 0) {
  21.         int r = uniform_int_distribution<int>(0, 9)(rng);
  22.         int c = uniform_int_distribution<int>(0, 9)(rng);
  23.         if (m[r][c] != -1) { 
  24.             m[r][c] = -1; 
  25.             do_usuniecia--; 
  26.         }
  27.     }
  28.     for (int i = 0; i < 10; ++i) {
  29.         for (int j = 0; j < 10; ++j) {
  30.             cout << m[i][j] << (j == 9 ? "" : " ");
  31.         }
  32.         cout << "\n";
  33.     }
  34.     cout.flush();
  35.     return 0;
  36. }
Success #stdin #stdout 0s 5320KB
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stdout 
Standard output is empty
https://ideone.com/N2D1X0
language:
C++ (gcc 8.3)
created:
12 hours ago
visibility:
public

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