/in/foo.cc:76:20: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 const int inf=1<<31-1;
                  ~~^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:100:23: warning: 'bj' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int maxx=-inf,bj;
                       ^~
/in/foo.cc:90:23: warning: 'bj' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int maxx=-inf,bj;
                       ^~