Compilare: user.cpp: In function ‘void insert(int, int)’: user.cpp:31:10: warning: unused variable ‘t’ [-Wunused-variable] int id, t; ^ user.cpp: In function ‘void improve(int, int)’: user.cpp:43:6: warning: unused variable ‘t’ [-Wunused-variable] int t, id; ^ user.cpp: In function ‘void dijkstra()’: user.cpp:84:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < g[mn].size(); i++) { ~~^~~~~~~~~~~~~~