/in/foo.cc:7:19: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
 #define N (int)5e4+10
           ~~~~~~~~^~
/in/foo.cc:14:14: 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:14:23: 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:14:34: 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:14:42: 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:117:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
         long long mid=l+r>>1;
                       ~^~