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0_0_39619703_8938.cpp:1:2: error: invalid preprocessing directive #incldue; did you mean #include?
    1 | #incldue <iostream>
      |  ^~~~~~~
      |  include
0_0_39619703_8938.cpp: In function 'int main()':
0_0_39619703_8938.cpp:6:1: error: 'cin' was not declared in this scope
    6 | cin>>n;
      | ^~~
0_0_39619703_8938.cpp:1:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
  +++ |+#include <iostream>
    1 | #incldue <iostream>
0_0_39619703_8938.cpp:7:1: error: 'cout' was not declared in this scope
    7 | cout<<n*(n+1)/2;
      | ^~~~
0_0_39619703_8938.cpp:7:1: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?