/in/foo.cc: In function 'void init()':
/in/foo.cc:20:30: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
         for (int i=0; i+(1<<j-1)<n; i++)
                             ~^~
/in/foo.cc:21:50: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
             Max[i][j]=max(Max[i][j-1],Max[i+(1<<j-1)][j-1]);
                                                 ~^~