Compilare: user.cpp: In function ‘void Djkstra()’: user.cpp:51:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<G[vfmin].size(); ++j) ^ user.cpp: In function ‘void init()’: user.cpp:71:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<G[x0].size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:91:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:94:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &x, &y, &v.c); ^