View Compilation Error

0_0_22767755_24891.cpp:5:1: error: 'll' does not name a type
 ll a, b, c, d;
 ^
0_0_22767755_24891.cpp: In function 'int main()':
0_0_22767755_24891.cpp:13:33: error: 'a' was not declared in this scope
   scanf("%lld %lld %lld %lld", &a, &b, &c, &d);
                                 ^
0_0_22767755_24891.cpp:13:37: error: 'b' was not declared in this scope
   scanf("%lld %lld %lld %lld", &a, &b, &c, &d);
                                     ^
0_0_22767755_24891.cpp:13:41: error: 'c' was not declared in this scope
   scanf("%lld %lld %lld %lld", &a, &b, &c, &d);
                                         ^
0_0_22767755_24891.cpp:13:45: error: 'd' was not declared in this scope
   scanf("%lld %lld %lld %lld", &a, &b, &c, &d);
                                             ^