/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:60:21: warning: right operand of comma operator has no effect [-Wunused-value]
 #define r(x) x=read()
                     ^
/in/foo.cc:81:14: note: in expansion of macro 'r'
     r(n),(m),r(Q),r(u),r(v),r(T);
              ^
/in/foo.cc:100:23: warning: 'bj' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int maxx=-inf,bj;
                       ^~