View Compilation Error

0_0_30072390_8470.cpp: In function 'int main()':
0_0_30072390_8470.cpp:7:22: error: 'n' was not declared in this scope
   scanf("%lld%lld", &n, &a);
                      ^
0_0_30072390_8470.cpp:7:26: error: 'a' was not declared in this scope
   scanf("%lld%lld", &n, &a);
                          ^
0_0_30072390_8470.cpp:14:5: error: 'b' was not declared in this scope
     b = 2*tmp*tmp+2*tmp;
     ^
0_0_30072390_8470.cpp:15:5: error: 'c' was not declared in this scope
     c = b+1;
     ^
0_0_30072390_8470.cpp:20:5: error: 'b' was not declared in this scope
     b = tmp*tmp - 1;
     ^
0_0_30072390_8470.cpp:21:5: error: 'c' was not declared in this scope
     c = b + 2;
     ^