View Compilation Error

0_0_24115052_8188.cpp: In function 'int main()':
0_0_24115052_8188.cpp:20:31: error: 'x' was not declared in this scope
             scanf("%lld%lld",&x,&y);
                               ^
0_0_24115052_8188.cpp:20:34: error: 'y' was not declared in this scope
             scanf("%lld%lld",&x,&y);
                                  ^