Compilare: user.cpp: In function ‘void init()’: user.cpp:54:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gr[x0].size(); ++i) ^ user.cpp: In function ‘void dijkstra(int)’: user.cpp:60:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<gr[vfS].size(); ++i){ ^ user.cpp:77:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<gr[vfMin].size(); ++j){ ^ user.cpp: In function ‘void citire()’: user.cpp:35:32: 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:37:42: 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, &c); ^