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0_0_16094641_16185.cpp:1:216: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/stdio.h>in: Invalid argument
 #include<stdio.h>int main(){ int n; int sum;    while(scanf("%d",&n)!=EOF)  //eof notice {  //娑擄拷鐎规俺顩︽潻娆庣疄缁狅拷  if(n%2==0)   sum=n/2*(1+n);  else   sum = (1+n)/2*n;  printf("%d/n/n",sum);  } return 0;}
                                                                                                                                                                                                                        ^
compilation terminated.