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CREATE OR REPLACE FUNCTION
pwc277.task2_plpgsql( nums int[] )
RETURNS int
AS $CODE$
DECLARE
strong_counter int := 0;
current int := 0;
BEGIN
FOR i IN 1 .. array_length( nums, 1 ) - 1 LOOP
FOR j in ( i + 1 ) .. array_length( nums, 1 ) LOOP
SELECT min( x )
INTO current
FROM unnest( array[ nums[ i ], nums[ j ] ] ) x;
IF current > abs( nums[ i ] - nums[ j ] ) AND nums[ i ] <> nums[ j ] THEN
strong_counter := strong_counter + 1;
END IF;
END LOOP;
END LOOP;
RETURN strong_counter;
END
$CODE$
LANGUAGE plpgsql;
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