View Compilation Error

0_0_25420145_28161.cpp: In function 'bool com(node, node)':
0_0_25420145_28161.cpp:21:8: error: 'l' was not declared in this scope
     if(l >= r && b.l >= b.r)
        ^
0_0_25420145_28161.cpp:21:13: error: 'r' was not declared in this scope
     if(l >= r && b.l >= b.r)
             ^
0_0_25420145_28161.cpp:23:12: error: 'l' was not declared in this scope
     return l < b.l;
            ^