#include #define rep(i,n) for(int i=0;i<(n);i++) using namespace std; vector> solve_odd(int n){ vector B(n,vector(n,0)); int i=0,j=n/2; rep(k,n*n){ B[i][j]=k+1; i=(i-1+n)%n; j=(j+1)%n; if(B[i][j]!=0){ i=(i+2)%n; j=(j-1+n)%n; } } return B; } int main(){ int n; scanf("%d",&n); vector B(n,vector(n,0)); if(n%2==1){ B=solve_odd(n); } else if(n%4==0){ rep(i,n) rep(j,n) { if(i%4==j%4 || i%4+j%4==3) B[i][j]=i*n+j+1; } for(int i=n-1;i>=0;i--) for(int j=n-1;j>=0;j--) { if(i%4!=j%4 && i%4+j%4!=3) B[i][j]=(n-i-1)*n+(n-j-1)+1; } } else{ auto C=solve_odd(n/2); rep(i,n/2) rep(j,n/2) C[i][j]=4*(C[i][j]-1); rep(i,n/2) rep(j,n/2) { // L if(i