View Compilation Error

0_0_16094653_20532.cpp: In function 'int main()':
0_0_16094653_20532.cpp:2:57: error: expected statement at end of input
 int main(){ int n; int sum;    while(scanf("%d",&n)!=EOF)  //eof notice {  //涓�瀹氳杩欎箞绠�  if(n%2==0)   sum=n/2*(1+n);  else   sum = (1+n)/2*n;  printf("%dnn",sum);  } return 0;}
                                                         ^
0_0_16094653_20532.cpp:2:57: error: expected '}' at end of input