Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:33: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfst(int)’: user.cpp:44: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs2(int, int)’: user.cpp:68: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void new_graph()’: user.cpp:79: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘bool cupleaza(int)’: user.cpp:114: warning: comparison between signed and unsigned integer expressions user.cpp:125: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void cuplaj()’: user.cpp:151: warning: comparison between signed and unsigned integer expressions user.cpp:162: warning: comparison between signed and unsigned integer expressions user.cpp:167: warning: comparison between signed and unsigned integer expressions user.cpp:172: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void afi()’: user.cpp:183: warning: comparison between signed and unsigned integer expressions