View Compilation Error

0_0_21262497_19925.cpp: In member function 'int D::H()':
0_0_21262497_19925.cpp:20:42: error: too few arguments to function 'int abs(int, int)'
           sum1+=abs(i-loc_1[a[P(i,j)]][0])+abs(j-loc_1[a[P(i,j)]][1]);
                                          ^
0_0_21262497_19925.cpp:9:12: note: declared here
 inline int abs(int a, int b) {
            ^
0_0_21262497_19925.cpp:20:69: error: too few arguments to function 'int abs(int, int)'
           sum1+=abs(i-loc_1[a[P(i,j)]][0])+abs(j-loc_1[a[P(i,j)]][1]);
                                                                     ^
0_0_21262497_19925.cpp:9:12: note: declared here
 inline int abs(int a, int b) {
            ^