Compilare: user.cpp: In function ‘int main()’: user.cpp:92:35: warning: format ‘%d’ expects argument of type ‘int’, but argument 2 has type ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type {aka std::pair<int, int>}’ [-Wformat=] printf("%d %d\n",X[i],X[i]); ^ user.cpp:92:35: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type {aka std::pair<int, int>}’ [-Wformat=] user.cpp:42:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.in","r",stdin); ^ user.cpp:43:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("alpin.out","w",stdout); ^ user.cpp:45:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:50:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^