Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:44:13: warning: unused variable ‘d’ [-Wunused-variable] int d = h.begin()->second; ^ user.cpp: In function ‘void citire()’: user.cpp:18:31: 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:26:41: 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); ^