Eroare de compilare: user.cpp: In function ‘void tarj(int)’: user.cpp:23:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < con[nod].size(); i++) { ^ user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘int main()’: user.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < results.size(); i++) { ^ user.cpp:74:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < results[i].size(); j++) { ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::vector<int>*, std::vector<std::vector<int> > >; _Tp = std::vector<int>; _Compare = bool (*)(std::vector<int>&, std::vector<int>&)]’: /usr/include/c++/4.8/bits/stl_algo.h:2319:78: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::vector<int>*, std::vector<std::vector<int> > >; _Compare = bool (*)(std::vector<int>&, std::vector<int>&)]’ /usr/include/c++/4.8/bits/stl_algo.h:2360:62: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<std::vector<int>*, std::vector<std::vector<int> > >; _Size = int; _Compare = bool (*)(std::vector<int>&, std::vector<int>&)]’ /usr/include/c++/4.8/bits/stl_algo.h:5513:44: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<std::vector<int>*, std::vector<std::vector<int> > >; _Compare = bool (*)(std::vector<int>&, std::vector<int>&)]’ user.cpp:71:45: required from here /usr/include/c++/4.8/bits/stl_algo.h:2287:35: error: invalid initialization of reference of type ‘std::vector<int>&’ from expression of type ‘const std::vector<int>’ while (__comp(*__first, __pivot)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2290:34: error: invalid initialization of reference of type ‘std::vector<int>&’ from expression of type ‘const std::vector<int>’ while (__comp(__pivot, *__last)) ^ user.cpp:57:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.in", "r", stdin); ^ user.cpp:58:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("retele.out", "w", stdout); ^ user.cpp:59:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:62:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &a, &b); ^