Run id: 132522

Main.cc: In function 'int main()':
Main.cc:15:18: error: 'n' was not declared in this scope
   for(int i=2;i<=n;i++){   
                  ^
Main.cc:19:13: error: 'z' was not declared in this scope
             z=1;
             ^
Main.cc:17:18: warning: unused variable 'j' [-Wunused-variable]
          for(int j=i/2;i>=0;i-- ){
                  ^