/in/foo.cc: In function 'int main()':
/in/foo.cc:7:20: warning: unused variable 'temp' [-Wunused-variable]
  int w,n,pi[30000],temp[2]={0},z=0;
                    ^~~~
/in/foo.cc:9:8: warning: unused variable 'h' [-Wunused-variable]
  int i,h=0,l=0;
        ^
/in/foo.cc:9:12: warning: unused variable 'l' [-Wunused-variable]
  int i,h=0,l=0;
            ^