Compilare: user.cpp: In function ‘void dfs_edg_crit(int, int, int)’: user.cpp:25: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void dfs(int)’: user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void read()’: user.cpp:77: warning: comparison between signed and unsigned integer expressions user.cpp:57: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void read1()’: user.cpp:148: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void solve()’: user.cpp:171: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:179: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result