Compilare: main.cpp:25:10: warning: overflow in implicit constant conversion [-Woverflow] int mn = 10e9,centru = -1; ^~~~ main.cpp: In function 'void dfs_1(int)': main.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs_2(int)': main.cpp:45:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs_3(int)': main.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) ~~^~~~~~~~~~~~~~~