View Compilation Error

0_0_33818538_86.cpp: In member function 'void SegmentTree::solve(ll)':
0_0_33818538_86.cpp:8:12: error: 'struct part' has no member named 'first'
 #define fi first
            ^
0_0_33818538_86.cpp:7:32: note: in definition of macro 'de'
 #define de(x) cerr<<#x<<" = "<<x<<endl
                                ^
0_0_33818538_86.cpp:159:11: note: in expansion of macro 'fi'
    de(it->fi), de(it->se);
           ^
0_0_33818538_86.cpp:9:12: error: 'struct part' has no member named 'second'
 #define se second
            ^
0_0_33818538_86.cpp:7:32: note: in definition of macro 'de'
 #define de(x) cerr<<#x<<" = "<<x<<endl
                                ^
0_0_33818538_86.cpp:159:23: note: in expansion of macro 'se'
    de(it->fi), de(it->se);
                       ^