Compilare: user.cpp: In function ‘int BellmanFord()’: user.cpp:57:14: warning: unused variable ‘way’ [-Wunused-variable] bool way = 1; ^ user.cpp: In function ‘int main()’: user.cpp:76:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &N, &M, &S, &D); ^ user.cpp:80:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &A, &B, &C, &Z); ^