foo.cc: In function 'int main()':
foo.cc:6:9: error: 'cin' was not declared in this scope
    6 |         cin>>year>>m;
      |         ^~~
foo.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include <stdio.h>
  +++ |+#include <iostream>
    2 | using namespace std;
foo.cc:9:17: error: 'cout' was not declared in this scope
    9 |                 cout<<a[m-1]<<end1;
      |                 ^~~~
foo.cc:9:17: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:9:31: error: 'end1' was not declared in this scope
    9 |                 cout<<a[m-1]<<end1;
      |                               ^~~~
foo.cc:12:17: error: 'cout' was not declared in this scope
   12 |                 cout<<a[m-1]<<end1;
      |                 ^~~~
foo.cc:12:17: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
foo.cc:12:31: error: 'end1' was not declared in this scope
   12 |                 cout<<a[m-1]<<end1;
      |                               ^~~~

[Hydro](https://hydro.ac)提供评测服务