View Compilation Error

0_0_31981325_12697.cpp: In function 'int main()':
0_0_31981325_12697.cpp:3:12: error: 'struct std::pair<int, int>' has no member named 'secondss'
 #define se secondss
            ^
0_0_31981325_12697.cpp:15:11: note: in expansion of macro 'se'
    arr[i].se = i;
           ^
0_0_31981325_12697.cpp:3:12: error: 'struct std::pair<int, int>' has no member named 'secondss'
 #define se secondss
            ^
0_0_31981325_12697.cpp:23:18: note: in expansion of macro 'se'
     cout<<arr[i].se;
                  ^