0_0_26898958_30181.cpp: In function 'int main()':
0_0_26898958_30181.cpp:5:2: error: 'cin' was not declared in this scope
cin>>n;
^
0_0_26898958_30181.cpp:15:3: error: 'cout' was not declared in this scope
cout<<sum<<endl<<endl;
^
0_0_26898958_30181.cpp:15:14: error: 'endl' was not declared in this scope
cout<<sum<<endl<<endl;
^
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