Compilare: user.cpp: In function ‘long long int solve(std::vector<int>)’: user.cpp:37:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i + 1 < v.size(); ++i) ^ user.cpp: In function ‘void Infasuratoare(std::vector<int>&, std::vector<int>&)’: user.cpp:54:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2 ; i < v.size() ; ++ i) { ^ user.cpp: In function ‘std::string make_solution(std::vector<int>, std::vector<int>)’: user.cpp:78:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < Sol3.size() ; ++j){ ^ user.cpp:82:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0 ; j < Sol4.size() ; ++j){ ^ user.cpp: In function ‘int main()’: user.cpp:93:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gradina.in", "r", stdin); ^ user.cpp:95:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:98:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &A, &B); ^