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 ‘int main()’: user.cpp:36:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2; i <= n - k + 1 && rs1.size() <= n; ++i) { ^ user.cpp:47:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(rs1.size() < n) rs1.push_back(1); ^ user.cpp:52:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2; i <= n - k + 1 && rs2.size() <= n; ++i) { ^ user.cpp:63:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(rs2.size() < n) rs2.push_back(1); ^