/in/foo.cc: In function 'int main()':
/in/foo.cc:41:22: warning: variable 'pa' set but not used [-Wunused-but-set-variable]
   LL ans=1e16,t; int pa,pb,sa=0,sb=0;
                      ^~
/in/foo.cc:41:25: warning: variable 'pb' set but not used [-Wunused-but-set-variable]
   LL ans=1e16,t; int pa,pb,sa=0,sb=0;
                         ^~
/in/foo.cc:41:28: warning: unused variable 'sa' [-Wunused-variable]
   LL ans=1e16,t; int pa,pb,sa=0,sb=0;
                            ^~
/in/foo.cc:41:33: warning: unused variable 'sb' [-Wunused-variable]
   LL ans=1e16,t; int pa,pb,sa=0,sb=0;
                                 ^~