View Compilation Error

0_0_36987428_6044.cpp: In function 'int main()':
0_0_36987428_6044.cpp:7:11: error: invalid operands of types 'const char [5]' and 'long long int' to binary 'operator&'
 #define a first
           ^
0_0_36987428_6044.cpp:55:32: note: in expansion of macro 'a'
             scanf("%lld" &g[i].a);
                                ^