Compilare: user.cpp: In function ‘int main()’: user.cpp:82:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < A.size(); i++) ^ user.cpp:59:9: warning: unused variable ‘aux’ [-Wunused-variable] int aux = 0; ^ user.cpp: In function ‘void get_set(std::vector<std::pair<int, int> >&)’: user.cpp:24:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:46:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("simetrii.in","r",stdin); ^ user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("simetrii.out","w",stdout); ^ user.cpp:52:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^