Compilare: user.cpp: In function ‘void dfs(long int)’: user.cpp:26:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<list[node].size();i++){ ^ user.cpp: In function ‘void dfsC(long int)’: user.cpp:36:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<rList[node].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:70:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<list[i].size();j++){ ^ user.cpp:81:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<cList[i].size();j++) ^ user.cpp:90:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<cList[i].size();i++){ ^ user.cpp:98:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<cList[i].size();j++){ ^ user.cpp:106:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<Comp[i].size();j++){ ^ user.cpp:113:30: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<long int>::size_type {aka unsigned int}’ [-Wformat=] printf("%ld\n",ans.size()); ^ user.cpp:114:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ans.size();i++) printf("%ld ",ans[i]); ^ user.cpp:45:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.in","r",stdin); ^ user.cpp:46:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("drumuri5.out","w",stdout); ^ user.cpp:48:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^ user.cpp:50:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&x,&y); ^