Compilare: user.cpp: In function ‘void dijkstra(int)’: user.cpp:25: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int bellman_ford()’: user.cpp:40: warning: unused variable ‘nod’ user.cpp:40: warning: unused variable ‘vec’ user.cpp: In function ‘int main()’: user.cpp:107: warning: comparison between signed and unsigned integer expressions user.cpp:92: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:93: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:94: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result