View Compilation Error

0_0_37142431_15729.cpp: In function 'll query(int, int, int)':
0_0_37142431_15729.cpp:88:8: error: 'l' was not declared in this scope
     if(l==r)    return 0;
        ^
0_0_37142431_15729.cpp:88:11: error: 'r' was not declared in this scope
     if(l==r)    return 0;
           ^