Compilare: user.cpp: In function ‘void dfs(long int)’: user.cpp:27:36: 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:37:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<rList[node].size();i++){ ^ user.cpp: In function ‘void add_comp(long int)’: user.cpp:45:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<Comp[c].size();i++) ^ user.cpp: In function ‘void elim_comp(long int)’: user.cpp:50:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(long i=0;i<cList[c].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:83:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<list[i].size();j++){ ^ user.cpp:94:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=1;j<cList[i].size();j++) ^ user.cpp:104:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<cList[i].size();j++){ ^ user.cpp:120:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ext[l].size();i++){ ^ user.cpp:128:30: 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:129:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ans.size();i++) printf("%ld ",ans[i]); ^ user.cpp:58:37: 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:59:39: 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:61:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&n,&m); ^ user.cpp:63:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld",&x,&y); ^