Compilare: user.cpp: In function ‘void citire()’: user.cpp:22:9: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y; ^ user.cpp: In function ‘void solve_V2()’: user.cpp:64:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < Q.size(); i++){ // Q.size() creste pana am parcurs toate vf ^ user.cpp: In function ‘int main()’: user.cpp:77:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.in", "r", stdin); ^ user.cpp:78:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.out", "w", stdout); ^