Compilare: user.cpp: In function ‘void bellman_ford()’: user.cpp:59: warning: comparison between signed and unsigned integer expressions user.cpp:63: warning: comparison between signed and unsigned integer expressions user.cpp:49: warning: unused variable ‘nm’ user.cpp: In function ‘int dijkstra()’: user.cpp:98: warning: comparison between signed and unsigned integer expressions user.cpp:118: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:161: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:165: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result