View Compilation Error

0_0_32104802_13740.cpp: In function 'int main()':
0_0_32104802_13740.cpp:13:21: error: 'llabs' was not declared in this scope
     if (llabs(score1) > max) max = llabs(score1), memo_score = score1, pos_x = i, pos_y = j;
                     ^