Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:36:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v[nod].size();i ++) ^ user.cpp: In function ‘int main()’: user.cpp:58:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < v[nod].size(); i++){ ^ user.cpp: In function ‘void citire()’: user.cpp:20:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:23:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^ user.cpp: In function ‘int main()’: user.cpp:48:37: 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:49:39: 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); ^