Can a Subsequence of Measurable Functions Converge in L1?

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Homework Statement



Let fn be a sequence of measurable functions converges to f a.e. Is it possible to get a subsequence fnk of fn s.t. fn converges in L1 ?

2. The attempt at a solution
I have proved the converse statement is true and i guess the above statement is impossible but I fail to prove it.
 
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Hint: Look for a counterexample where ##f_n \rightarrow 0## pointwise but ##\|f_n\| = 1## for all ##n##.
 
Thanks for your suggestion
 
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