#include <stdio.h>
int main(void) {
// your code goes here
int n;
int odd=1;
int even=2;
int i=0;
for(i=0;i<=n/2;i++){
for(int j=0;j<n;j++){
if(j<(n/2)-i || j>(n/2)+i){
even+=2;
}
else{
odd+=2;
}
}
}
int p=n-1;
for(;i<n;i++){
for(int j=0;j<n;j++){
if(j<(n-p) || j>(p-1)){
even+=2;
}
else{
odd+=2;
}
}
p--;
}
return 0;
}
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