Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:15:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[dad].size(); i++) ^ user.cpp:12:17: warning: unused variable ‘b’ [-Wunused-variable] int i, son, b=0, bb=0; ^ user.cpp:12:22: warning: unused variable ‘bb’ [-Wunused-variable] int i, son, b=0, bb=0; ^ user.cpp: In function ‘void dfss(int)’: user.cpp:35:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<query[dad].size(); i++) ^ user.cpp:41:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<g[dad].size(); i++) ^