/in/foo.cc: In function 'void dfs1(int)':
/in/foo.cc:7:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i=1;(1<<i)<=d[x];++i)fa[x][i]=fa[fa[x][i-1]][i-1];mx[x]=d[x];
     ^~~
/in/foo.cc:7:63: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     for(int i=1;(1<<i)<=d[x];++i)fa[x][i]=fa[fa[x][i-1]][i-1];mx[x]=d[x];
                                                               ^~
/in/foo.cc: In function 'int A(int, int)':
/in/foo.cc:19:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(k>d[x])return 0;if(!k)return x;
     ^~
/in/foo.cc:19:24: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(k>d[x])return 0;if(!k)return x;
                        ^~
/in/foo.cc:21:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(!k)return x;int len=d[x]-d[bl[x]];
     ^~
/in/foo.cc:21:20: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
     if(!k)return x;int len=d[x]-d[bl[x]];
                    ^~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:28:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(scanf("%d",&n),i=1;i<n;++i)scanf("%d%d",&x,&y),insert(x,y);mx[0]=-1;
     ^~~
/in/foo.cc:28:68: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
     for(scanf("%d",&n),i=1;i<n;++i)scanf("%d%d",&x,&y),insert(x,y);mx[0]=-1;
                                                                    ^~
/in/foo.cc: In function 'int A(int, int)':
/in/foo.cc:25:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^