Compilare: user.cpp: In function ‘void DepthFirstSearch(int)’: user.cpp:40:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[X].size(); i++) { ^ user.cpp:51:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[X].size(); i++) { ^ user.cpp:60:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[X].size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:98:31: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘long long int’ [-Wformat=] printf("%d\n", blackEnd[K]); ^ user.cpp:79:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("karb2.in","r",stdin); ^ user.cpp:80:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("karb2.out","w",stdout); ^ user.cpp:82:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &K); ^ user.cpp:84:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &X); ^ user.cpp:88:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &X, &Y); ^