Compilare: user.cpp: In function ‘void BFS(int, int&, std::vector<int>&, std::queue<int>&)’: user.cpp:25:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto i = 0; i < A[k].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:64:35: warning: too many arguments for format [-Wformat-extra-args] printf("%d", d[finish], stdout); ^ user.cpp:48:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sate.in", "r", stdin); ^ user.cpp:49:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &m, &start, &finish); ^ user.cpp:54:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &y, &c); ^ user.cpp:63:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sate.out", "w", stdout); ^