/in/foo.cc: In function 'int GetMax()':
/in/foo.cc:2:24: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 #define MaxInt 1 << 31 - 1
                     ~~~^~~
/in/foo.cc:8:11: note: in expansion of macro 'MaxInt'
  int a = -MaxInt , b = -MaxInt , c = -MaxInt;
           ^~~~~~
/in/foo.cc:2:24: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 #define MaxInt 1 << 31 - 1
                     ~~~^~~
/in/foo.cc:8:25: note: in expansion of macro 'MaxInt'
  int a = -MaxInt , b = -MaxInt , c = -MaxInt;
                         ^~~~~~
/in/foo.cc:2:24: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
 #define MaxInt 1 << 31 - 1
                     ~~~^~~
/in/foo.cc:8:39: note: in expansion of macro 'MaxInt'
  int a = -MaxInt , b = -MaxInt , c = -MaxInt;
                                       ^~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:28:26: warning: unused variable 'l' [-Wunused-variable]
  int n,m,q,u,v,t,k,k1,k2,l;
                          ^