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#ifndef Codillity_PtrListLen_h
#define Codillity_PtrListLen_h
 
@interface IntList:NSObject {
@public
    int value;
    IntList *next;
}
@end
@implementation IntList @end
 
 
 
int solution(IntList * L) {
 
    int length=0;
 
    IntList *p = L;
 
    if (p == nil) {
        return 0;
    }
    if (p->next == nil) {
        return 1;
    }
    do {
        ++length;
        p = p->next;
    } while(p->next != nil);
 
    return length+1;
}
 
 
 
#endif

Main.java:1: error: illegal character: '#'
#ifndef Codillity_PtrListLen_h
^
Main.java:2: error: illegal character: '#'
#define Codillity_PtrListLen_h
^
Main.java:4: error: '{' expected
@interface IntList:NSObject {
                  ^
Main.java:5: error: <identifier> expected
@public
 ^
Main.java:6: error: = expected
    int value;
             ^
Main.java:7: error: <identifier> expected
    IntList *next;
           ^
Main.java:7: error: = expected
    IntList *next;
            ^
Main.java:7: error: ';' expected
    IntList *next;
             ^
Main.java:10: error: class, interface, or enum expected
@implementation IntList @end
                ^
Main.java:14: error: class, interface, or enum expected
int solution(IntList * L) {
^
Main.java:18: error: class, interface, or enum expected
    IntList *p = L;
    ^
Main.java:20: error: class, interface, or enum expected
    if (p == nil) {
    ^
Main.java:22: error: class, interface, or enum expected
    }
    ^
Main.java:25: error: class, interface, or enum expected
    }
    ^
Main.java:28: error: class, interface, or enum expected
        p = p->next;
        ^
Main.java:29: error: class, interface, or enum expected
    } while(p->next != nil);
    ^
Main.java:31: error: class, interface, or enum expected
    return length+1;
    ^
Main.java:32: error: class, interface, or enum expected
}
^
Main.java:36: error: illegal character: '#'
#endif
^
19 errors

Standard output is empty