Compilare: user.cpp: In function ‘void dfs1(int, int)’: user.cpp:33:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[ nod ].size(); i++) ^ user.cpp: In function ‘void dfs2(int, int)’: user.cpp:53:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[ nod ].size(); i++) ^ user.cpp: In function ‘void citire()’: user.cpp:18:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:22:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x, y; scanf("%d %d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:84:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("capitala.in","r",stdin); ^ user.cpp:85:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("capitala.out","w",stdout); ^