/in/foo.cc: In function 'void initLCA()':
/in/foo.cc:45:28: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         for(int i=1;i+(1<<k-1)<=euCnt;i++)
                           ~^~
/in/foo.cc:47:46: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
             int u=minR[i][k-1],v=minR[i+(1<<k-1)][k-1];
                                             ~^~