View Compilation Error

0_0_20980798_30543.cpp:1:1: error: 'l' does not name a type
 l=max (l,0);
 ^
0_0_20980798_30543.cpp:2:17: error: 'r' does not name a type
                 r=min(r,m-1);
                 ^
0_0_20980798_30543.cpp:3:29: error: 'l' was not declared in this scope
                 int fx=find(l);
                             ^
0_0_20980798_30543.cpp:3:30: error: 'find' was not declared in this scope
                 int fx=find(l);
                              ^
0_0_20980798_30543.cpp:4:17: error: expected unqualified-id before 'for'
                 for (int i=r; i>=l;)
                 ^
0_0_20980798_30543.cpp:4:31: error: 'i' does not name a type
                 for (int i=r; i>=l;)
                               ^
0_0_20980798_30543.cpp:4:36: error: expected unqualified-id before ')' token
                 for (int i=r; i>=l;)
                                    ^