foo.cc: In function 'void print(int)':
foo.cc:21:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(C>1<<20)Ot();if(x<0)sr[++C]=45,x=-x;
     ^~
foo.cc:21:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if(C>1<<20)Ot();if(x<0)sr[++C]=45,x=-x;
                     ^~
foo.cc:23:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while(sr[++C]=z[Z],--Z);sr[++C]='\n';
     ^~~~~
foo.cc:23:29: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
     while(sr[++C]=z[Z],--Z);sr[++C]='\n';
                             ^~
foo.cc: In function 'int query(int, int)':
foo.cc:71:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
     if(k>dep[u]) return 0;if(k==0) return u;
     ^~
foo.cc:71:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
     if(k>dep[u]) return 0;if(k==0) return u;
                           ^~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。