Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:46:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<vecin[nod].size();i++) ^ user.cpp: In function ‘int get()’: user.cpp:26:20: 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:51:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("paintball.in","r",stdin); ^ user.cpp:52:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("paintball.out","w",stdout); ^ /tmp/ccivO3Fv.o: In function `get()': user.cpp:(.text+0xa5): warning: the `gets' function is dangerous and should not be used.