Compilare: main.cpp: In function 'void solve(std::pair<int, int>)': main.cpp:17:9: warning: unused variable 'k' [-Wunused-variable] int k = 0; ^ main.cpp: In function 'void dfs(int, int)': main.cpp:39:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(it == parent) ^~ main.cpp:41:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' if(!viz[it]) ^~