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  1. #include <iostream>
  2. #include <vector>
  3.  
  4. using namespace std;
  5. vector< vector<int> > w(100, vector<int>(100));
  6. int n,x=0,y=0,m=1;
  7.  
  8. void f1(int n){
  9.     for(int i=0;i<n;i++){
  10.         w[x][y+i]=m;
  11.         m++;
  12.         };
  13.     x++;y+=n-1;
  14. };
  15.  
  16. void f2(int n){
  17.     for(int i=0;i<n;i++){
  18.         w[x+i][y]=m;
  19.         m++;
  20.         };
  21.     x+=n-1;y--;
  22. };
  23.  
  24. void f3(int n){
  25.     for(int i=0;i<n;i++){
  26.         w[x][y-i]=m;
  27.         m++;
  28.         };
  29.     x--;y-=n-1;
  30. };
  31.  
  32. void f4(int n){
  33.     for(int i=0;i<n;i++){
  34.         w[x-i][y]=m;
  35.         m++;
  36.         };
  37.     x-=n-1;y++;
  38. };
  39.  
  40. void out(){
  41.     for(int i=0;i<n;i++){
  42.         for(int j=0;j<n;j++)cout<<w[i][j]<<' ';
  43.         cout<<endl;
  44.         };
  45. };
  46.  
  47. int main(){
  48.     int k;
  49.     cin>>n;
  50.     for(int i=0;i<=(n-1)*2;i++){
  51.         k=n-(i+1)/2;
  52.         if(i%4==0)f1(k);
  53.         if(i%4==1)f2(k);
  54.         if(i%4==2)f3(k);
  55.         if(i%4==3)f4(k);
  56.         };
  57.     out();
  58.     return 0;
  59. }
  60.  
Success #stdin #stdout 0s 3464KB
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stdout
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1 2 3 
8 9 4 
7 6 5
https://ideone.com/nZWJkc
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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