Compilare: user.cpp: In function ‘void citire()’: user.cpp:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int dijkstra(int)’: user.cpp:54: warning: comparison between signed and unsigned integer expressions user.cpp:74: warning: control reaches end of non-void function