Compilare: user.cpp: In function ‘bool dijkstra(int)’: user.cpp:100: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:148: warning: comparison between signed and unsigned integer expressions user.cpp:122: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:124: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:127: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:129: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result