Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:28:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<V[curr].size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:63:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2;i<P.size();i++) ^ user.cpp:47:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&N,&M); ^ user.cpp:57:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d",&from,&curr.to,&curr.val); ^