View Compilation Error

0_0_16469261_21962.cpp:1:1: error: stray '\357' in program
 #include<iostream>
 ^
0_0_16469261_21962.cpp:1:1: error: stray '\273' in program
0_0_16469261_21962.cpp:1:1: error: stray '\277' in program
0_0_16469261_21962.cpp:1:4: error: stray '#' in program
 #include<iostream>
    ^
0_0_16469261_21962.cpp:1:5: error: 'include' does not name a type
 #include<iostream>
     ^
0_0_16469261_21962.cpp: In function 'int main()':
0_0_16469261_21962.cpp:8:8: error: 'cin' was not declared in this scope
  while(cin>>n)
        ^
0_0_16469261_21962.cpp:13:3: error: 'cout' was not declared in this scope
   cout<<a*(a-1)/2+b*(b-1)/2<<endl;
   ^
0_0_16469261_21962.cpp:13:30: error: 'endl' was not declared in this scope
   cout<<a*(a-1)/2+b*(b-1)/2<<endl;
                              ^