Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:79:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<fii[nod].size();i++){ ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:95:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<fii[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:160:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("arbfind.in","r",stdin); ^ user.cpp:161:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("arbfind.out","w",stdout); ^ user.cpp:166:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&n); ^ user.cpp:168:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&k); ^ user.cpp:171:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&x); ^ user.cpp:182:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&m); ^ user.cpp:184:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&k); ^ user.cpp:187:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d",&x); ^