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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. typedef std::vector<int> row;
  5. typedef std::vector<row> matrix;
  6.  
  7. void print_matrix(matrix m)
  8. {
  9. 	int k = 1;
  10.     for (int i = 0; i < (int)m.size(); i++)
  11.     {
  12.         	if (i % 2 == 0)
  13.         	{
  14.         		for (int j = 0; j < m[i].size(); j++)
  15.         		{
  16.         			if(j % 2 == 0)
  17.         			{
  18.         	 			m[i][j] = k++;
  19.         	 			std::cout << m[i][j] << " ";
  20.         			}
  21.         			else
  22.         			{
  23.         				std::cout << " ";
  24.         			}
  25.         		}
  26.         	}
  27.         	else
  28.         	{
  29.         	for (int j = m[i].size(); j >=0; j--)
  30.         	{
  31.         		if (j % 2 == 0)
  32.         		{
  33.         			m[i][j] = k++ ;
  34.         	 		std::cout << m[i][j] << " ";
  35.         		}
  36.         		else
  37.         		{
  38.         				std::cout << " ";
  39.         		}
  40.         	}
  41.         	}
  42.         	std::cout << "\n";
  43. 	}
  44. }
  45.  
  46. int main(){
  47.  
  48. 	int n;
  49. 	std::cin >> n;
  50. 	std::vector <std::vector<int>> a(n, std::vector<int>(n));
  51.  
  52. 	print_matrix(a);
  53.  
  54. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/XFVY9p
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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