Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:92:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:91:9: warning: variable ‘cnt’ set but not used [-Wunused-but-set-variable] int cnt = 0; ^ user.cpp: In function ‘void DFS2(int, int, char)’: user.cpp:107:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:119:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^ user.cpp:142:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[node].size(); i++) ^