Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:23:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < g[nod].size(); i++ ) dfs ( g[nod][i], len ); ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:16: warning: unused variable 'j' [-Wunused-variable] int n, m, i, j, a, b, nod; ^ main.cpp:32:25: warning: unused variable 'nod' [-Wunused-variable] int n, m, i, j, a, b, nod; ^~~