Compilare: main.cpp: In function 'int main()': main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < nodes[sorted[start]].from.size(); i++) { // Parcurgem toate elementele care ajung in cel actual ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:13:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.in", "r", stdin); ^ main.cpp:14:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.out", "w", stdout); ^ main.cpp:16:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &n, &m, &s); ^ main.cpp:19:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &x, &y); ^