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  1. // Author : Choudhary Reyan Khan
  2.  
  3.  
  4. #include <bits/stdc++.h>
  5. using namespace std;
  6.  
  7. int main() {
  8.     int row = 6, col = 7;
  9.     int mat[row][col];
  10.     map<int,int> mp;
  11.     map<int,int> str;
  12.     for(int i=0;i<row;i++){
  13.         for(int j=0;j<col;j++){
  14.             mat[i][j]=i-j;
  15.             mp[i-j]++;
  16.         }
  17.     }
  18.     int x = row-1;
  19.     int y = 0-(col-1);
  20.     int c=1, cnt=0, tmp=1;
  21.     for(int i=x;i>=y;i--){
  22.         str[i]=c;
  23.         if(cnt&1) str[i]+=(mp[i]-1);
  24.         c+=mp[i];
  25.         cnt++;
  26.     }
  27.     for(int i=0;i<row;i++){
  28.         for(int j=0;j<col;j++){
  29.             cout << str[mat[i][j]] << "\t";
  30.             if(row&1){
  31.                 if(mat[i][j]&1) str[mat[i][j]]--;
  32.                 else str[mat[i][j]]++;
  33.             }
  34.             else{
  35.                 if(mat[i][j]&1) str[mat[i][j]]++;
  36.                 else str[mat[i][j]]--;
  37.             }
  38.  
  39.         }
  40.         cout << "\n";
  41.     }
  42.  
  43.  
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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Standard input is empty
stdout
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21	22	32	33	39	40	42	
11	20	23	31	34	38	41	
10	12	19	24	30	35	37	
4	9	13	18	25	29	36	
3	5	8	14	17	26	28	
1	2	6	7	15	16	27
https://ideone.com/UKCVxA
language:
C++ (gcc 8.3)
created:
58 days ago
visibility:
public

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