Compilare: user.cpp: In function ‘void citire()’: user.cpp:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int dfs(int, int)’: user.cpp:77: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:116: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:117: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘int root()’: user.cpp:33: warning: control reaches end of non-void function