Compilare: user.cpp: In function ‘void dijkstra()’: user.cpp:81:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, lg; ^ user.cpp: In function ‘void citire()’: user.cpp:49:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d\n", &n, &m); ^ user.cpp:52:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &x, &y, &c); ^