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0_0_39127927_15764.cpp: In function 'int main()':
0_0_39127927_15764.cpp:22:5: error: 'ios_base' has not been declared
   22 |     ios_base::sync_with_stdio(false);
      |     ^~~~~~~~
0_0_39127927_15764.cpp:23:5: error: 'cin' was not declared in this scope
   23 |     cin.tie(0);
      |     ^~~
0_0_39127927_15764.cpp:4:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    3 | #include <vector>
  +++ |+#include <iostream>
    4 | #define rep(i,a,n) for(int i=a;i<n;i++)
0_0_39127927_15764.cpp:24:5: error: 'cout' was not declared in this scope
   24 |     cout.tie(0);
      |     ^~~~
0_0_39127927_15764.cpp:24:5: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?