Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:45:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V[y].size(); ++ i) ^ user.cpp: In function ‘void BellmanFord()’: user.cpp:73:13: warning: unused variable ‘nod’ [-Wunused-variable] int nod, x = q.front(); ^ user.cpp: In function ‘void solve()’: user.cpp:109:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < V[x].size(); ++ i) ^ user.cpp: In function ‘void read()’: user.cpp:23:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &u, &x); ^ user.cpp:25:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.cpp:29:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^