Compilare: user.cpp: In function ‘void bfs_sons()’: user.cpp:29: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void citire()’: user.cpp:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:47: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void dfs1(int)’: user.cpp:60: warning: comparison between signed and unsigned integer expressions user.cpp:70: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs2(int, int, int)’: user.cpp:104: warning: comparison between signed and unsigned integer expressions user.cpp:127: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs3(int)’: user.cpp:143: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:244: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result