Compilare: main.cpp: In function 'int main()': main.cpp:57:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] 57 | for(auto u:v[root]) | ^~~ main.cpp:59:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for' 59 | f[root]=1; | ^ main.cpp:40:13: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized] 40 | int root; | ^~~~