View Compilation Error

0_0_38564733_382.cpp: In function 'int main()':
0_0_38564733_382.cpp:9:27: error: 'N' was not declared in this scope
     while(~scanf("%I64d",&N))
                           ^
0_0_38564733_382.cpp:11:9: error: 'sum' was not declared in this scope
         sum = 0;
         ^