/in/foo.cc: In function 'int main()':
/in/foo.cc:15:15: warning: variable 'b' set but not used [-Wunused-but-set-variable]
   int n,m,q,i,b[200];
               ^
/in/foo.cc:33:13: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
        ans=j-1+x;
            ~^~