Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:30:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G1[nod].size(); i++) ^ user.cpp: In function ‘void dfs_euler(int)’: user.cpp:51:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G1[nod].size(); i++) ^ user.cpp: In function ‘void marcheaza(int)’: user.cpp:80:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G1[nod].size(); i++) ^ user.cpp: In function ‘void re_num(int)’: user.cpp:138:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G0[nod].size(); i++) ^ user.cpp: In function ‘void re_build(int, int)’: user.cpp:150:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G0[nod].size(); i++) ^