Compilare: user.cpp: In function ‘void solve()’: user.cpp:64:9: warning: unused variable ‘next’ [-Wunused-variable] int next; ^ user.cpp: In function ‘void read()’: user.cpp:37:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:40:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &G[i].cost); ^