View Compilation Error

0_0_30460542_5461.cpp: In function 'int fid(int, int, int, int)':
0_0_30460542_5461.cpp:34:23: error: 'ret' was not declared in this scope
     if(maxx[rt<<1]>=k)ret=fid(k,ls);
                       ^
0_0_30460542_5461.cpp:35:30: error: 'ret' was not declared in this scope
     else if(maxx[rt<<1|1]>=k)ret=fid(k,rs);
                              ^
0_0_30460542_5461.cpp:36:12: error: 'ret' was not declared in this scope
     return ret;
            ^