Compilare: user.cpp: In function ‘void citire()’: user.cpp:13: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void bfs(int, int*)’: user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void intersect()’: user.cpp:58: warning: the address of ‘costX’ will always evaluate as ‘true’ user.cpp: In function ‘int main()’: user.cpp:86: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:87: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result