Compilare: user.cpp: In function ‘double kruskal(int)’: user.cpp:83:19: warning: unused variable ‘k’ [-Wunused-variable] int i, j = 0, k; ^ user.cpp: In function ‘void solve()’: user.cpp:104:27: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] printf("%llf\n", total); ^ user.cpp:120:31: warning: use of ‘ll’ length modifier with ‘f’ type character [-Wformat=] printf("%llf\n", total); ^ user.cpp:106:12: warning: unused variable ‘minim’ [-Wunused-variable] double minim; ^