/in/foo.cc:7:19: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 #define N (int)5e4+10
           ~~~~~~~~^~
/in/foo.cc:14:11: note: in expansion of macro 'N'
  int head[N<<1],to[N<<1],next[N<<1],w[N<<1],cnt;
           ^
/in/foo.cc:7:19: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 #define N (int)5e4+10
           ~~~~~~~~^~
/in/foo.cc:14:20: note: in expansion of macro 'N'
  int head[N<<1],to[N<<1],next[N<<1],w[N<<1],cnt;
                    ^
/in/foo.cc:7:19: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 #define N (int)5e4+10
           ~~~~~~~~^~
/in/foo.cc:14:31: note: in expansion of macro 'N'
  int head[N<<1],to[N<<1],next[N<<1],w[N<<1],cnt;
                               ^
/in/foo.cc:7:19: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 #define N (int)5e4+10
           ~~~~~~~~^~
/in/foo.cc:14:39: note: in expansion of macro 'N'
  int head[N<<1],to[N<<1],next[N<<1],w[N<<1],cnt;
                                       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:99:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   long long mid=l+r>>1;
                 ~^~