int main(){int t;scanf("%d",&t);char x[200],y[200];strcpy(x,"#");strcpy(y," ##");for(;t>1;t--){strcat(x," #");strcat(y," ##");}strcat(x,"\n");printf("%s\n %s%s%s%s %s%s",y,x,x,x,x,x,y);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).