Eroare de compilare: user.cpp: In function ‘bool check(std::vector<int>&)’: user.cpp:10:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v.size() != n) return 0; ^ user.cpp: In function ‘void solve()’: user.cpp:32:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2; i <= n - k + 1 && rs.size() <= n; ++i) { ^ user.cpp:33:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rs.size() > k) S.erase(S.find(-rs[pz])), ++pz; ^ user.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(rs.size() > k) { ^ user.cpp:54:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(rs.size() < n) rs.push_back(1); ^ user.cpp:56:28: error: return-statement with a value, in function returning 'void' [-fpermissive] if(!check(rs)) return {-1}; ^