Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:28:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[node].size(); i++) { ^ user.cpp:42:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[node].size(); i++) { ^ user.cpp:57:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[node].size(); i++) { ^ user.cpp:72:11: warning: unused variable ‘color’ [-Wunused-variable] int color = it->first; ^ user.cpp:82:24: warning: ‘maxcol’ may be used uninitialized in this function [-Wmaybe-uninitialized] cres[node] = maxcol; ^