Compilare: user.cpp: In function ‘void dfs(int, int, int)’: user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < T[x].size(); ++i) ^ user.cpp: In function ‘void dfs2(int, int)’: user.cpp:50:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < T[x].size(); ++i) ^ user.cpp:74:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < T[x].size(); ++i) ^ user.cpp:100:21: warning: unused variable ‘seek’ [-Wunused-variable] int seek = -road; ^ user.cpp:77:17: warning: unused variable ‘c’ [-Wunused-variable] int c = T[x][i].second; ^