/in/foo.cc:42:2: error: unterminated comment
  /*for(ri i=1;i<=n;i++)if(dist[Start]<dist[i])Start=i;
  ^
/in/foo.cc: In function 'void GetMlen()':
/in/foo.cc:40:14: warning: unused variable 'End' [-Wunused-variable]
  int Start=1,End=1;
              ^~~
/in/foo.cc:41:26: error: expected '}' at end of input
  dist[Start]=0,DFS(Start);
                          ^