View Compilation Error

0_0_16037601_14337.cpp:1:160: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/iostream>usin: Invalid argument
 #include <iostream>using namespace std;int main(){ int n,sum,i; while (cin>>n) {  for (i=0,sum=0;i<=n/3;i++)   sum+=(n-3*i)/2+1;  cout<<sum<<endl; } return 0;}
                                                                                                                                                                ^
compilation terminated.