Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:24:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[rad].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < l[rad].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:76:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i = 1; i <= n; i++) ^~~ main.cpp:83:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' int h = 0; ^~~ main.cpp:74:9: warning: 'rad' may be used uninitialized in this function [-Wmaybe-uninitialized] int rad; ^~~