/in/foo.cc: In function 'bool zuo()':
/in/foo.cc:19:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(!L)return 0;if(!R)return 1;
  ^~
/in/foo.cc:19:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if(!L)return 0;if(!R)return 1;
                 ^~
/in/foo.cc: In function 'int main()':
/in/foo.cc:50:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if(L)d[L].r=R;if(R)d[R].l=L;
   ^~
/in/foo.cc:50:17: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
   if(L)d[L].r=R;if(R)d[R].l=L;
                 ^~
/in/foo.cc:67:23: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
   printf("%d %d\n",A,B);
                       ^
/in/foo.cc:67:23: warning: format '%d' expects argument of type 'int', but argument 3 has type 'll {aka long long int}' [-Wformat=]