Compilare: user.cpp: In function ‘void BellmanFord()’: user.cpp:56:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < A[x].size(); i++) ^ user.cpp: In function ‘void sorting()’: user.cpp:99:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < B[x].size(); i++) ^ user.cpp:79:6: warning: variable ‘viz’ set but not used [-Wunused-but-set-variable] int viz[Nmax]; ^ user.cpp: In function ‘int main()’: user.cpp:120:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &t); ^ user.cpp:123:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d", &n, &m); ^ user.cpp:128:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d %d %d", &M[i].x, &M[i].y, &M[i].cost); ^