Main.cc: In function ‘void spr(int, int, int)’:
Main.cc:10:30: error: return-statement with a value, in function returning ‘void’ [-fpermissive]
   10 |     if(n==1){bas(i,j);return 0;}
      |                              ^
Main.cc:12:38: error: too many arguments to function ‘void spr(int, int, int)’
   12 |     spr(i,j+(1<<(n-1)),j+(1<<(n)),n-1);
      |                                      ^
Main.cc:9:13: note: declared here
    9 | inline void spr(int i,int j,int n){
      |             ^~~
Main.cc: In function ‘int main()’:
Main.cc:17:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   17 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~