Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < v[ nod ].size(); ++i ){ ^ user.cpp:20:9: warning: unused variable ‘n’ [-Wunused-variable] int n, i, ok, fiu; ^ user.cpp: In function ‘int main()’: user.cpp:65:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( i = 0; i < aux.size() ; ++i ) printf("%d ",aux[ i ]); ^ user.cpp:49:18: warning: unused variable ‘j’ [-Wunused-variable] int n, m, i, j, x, y; ^ user.cpp:46:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sediu.in","r",stdin); ^ user.cpp:47:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sediu.out","w",stdout); ^ user.cpp:51:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:54:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^