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 getInt()’: user.cpp:168:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp: In function ‘int main()’: user.cpp:182:37: 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:183:39: 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); ^ /tmp/cc2PGiPb.o: In function `getInt()': user.cpp:(.text+0x7f0): warning: the `gets' function is dangerous and should not be used.