View Compilation Error

0_0_37713888_656.cpp: In function 'void solve()':
0_0_37713888_656.cpp:7:11: error: 'second' was not declared in this scope
 #define y second
           ^
0_0_37713888_656.cpp:82:31: note: in expansion of macro 'y'
        int a = x + dx[i], b = y + dy[i];
                               ^