Compilare: user.cpp: In function ‘void BF(int, char)’: user.cpp:55:36: warning: unused variable ‘dist’ [-Wunused-variable] int adj = e.first, dist = e.second; ^~~~ user.cpp: In function ‘int main()’: user.cpp:116:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &k); ^ user.cpp:120:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:124:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &vmax, &lim); ^ user.cpp:131:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &u, &v, &len); ^