Compilare: user.cpp: In function ‘void Solve(std::vector<int>, std::vector<int>)’: user.cpp:119:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<A.size(); i++) ^ user.cpp:130:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<D.size(); i++) ^ user.cpp:136:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<A.size(); i++) ^ user.cpp:148:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<A.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:155:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("plimbare.in", "r", stdin); ^ user.cpp:156:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("plimbare.out", "w", stdout); ^ user.cpp:157:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:162:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &X, &Y); ^