#include <iostream>
#include <algorithm>
#include <random>
#include <tuple>
#include <set>

using namespace std;

int main()
{
  unsigned width;
  unsigned height;
  unsigned mine_count;
  
  cout << "Mata in spelplanens bredd: ";
  cin >> width;
  cout << "Mata in spelplanens höjd : ";
  cin >> height;
  cout << "Mata in antalet minor    : ";
  cin >> mine_count;
  cout << endl;
  
  random_device rnd;
  uniform_int_distribution<unsigned> row(1, height);
  uniform_int_distribution<unsigned> col(1, width);
  
  set<tuple<unsigned, unsigned>> mine_pos;    
  while (mine_pos.size() < min(mine_count, width*height))
  {
    mine_pos.insert(make_tuple(row(rnd), col(rnd)));
  }
  
  for (unsigned r = 1; r <= height; ++r)
  {
    for (unsigned c = 1; c <= width; ++c)
    {
      if ( mine_pos.find( make_tuple(r, c) ) != mine_pos.end() )
        cout << '*';
      else
        cout << '.';
    }
    cout << endl;
  }
  return 0;
}