Compilare: user.cpp: In function ‘bool Bellman_Ford(int, int)’: user.cpp:51:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graph[x].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:83:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d",&N,&M); ^ user.cpp:86:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(IN,"%d%d%d",&X,&Y,&C); ^