251-2

1 files changed, 21 insertions, 21 deletions

diff --git a/challenge-251/0rir/raku/ch-2.raku b/challenge-251/0rir/raku/ch-2.raku
index 329adadc43..84ba81fe66 100755
--- a/challenge-251/0rir/raku/ch-2.raku
+++ b/challenge-251/0rir/raku/ch-2.raku
@@ -5,8 +5,6 @@ use v6.e.PREVIEW;
 use Math::Matrix;
 use Test;
 
-say %*ENV<VERSION>;
-
 =begin comment
 251-2: Lucky Numbers        Submitted by: Mohammad S Anwar
 You are given a m x n matrix of distinct numbers.
@@ -35,46 +33,48 @@ Output: 7
 
 
 my @Test =
+    -1,  [],
+    1,        [ 1, 2, 3 ],
+    1,      [ [ 1, 2, 3], ],
     12,     [ [ 1,  10,  4,  2],
               [ 9,  3,  8,  7],
               [15, 16, 17, 12] ],
     15,     [ [ 3,  7,  8],
               [ 9, 11, 13],
               [15, 16, 17] ],
-    7,      [ [7 ,8],
-              [1 ,2] ],
+     7,      [ [7 ,8],
+               [1 ,2] ],
+    -1,     [ [ 1,2,3 ],
+              [ 7,5,6 ],
+              [ 4,8,9 ], ],
 ;
 plan @Test ÷ 2;
 
 sub ____ (+@list) { gather @list.deepmap: *.take }   # move to Flatland
 
-the-lucky-number-is();
+# is a one-dim array a matrix?
+multi the-lucky-number-is( @a where * ~~ Empty) { -1 }
+multi the-lucky-number-is( @a where (*.end == 0 and *[0] !~~ Array)) { @a.min }
+multi the-lucky-number-is( @a where (*.end == 1 and *[0] ~~ Array)) {
+    @a[0].min
+}
 
-sub the-lucky-number-is( @a = @Test[1] --> Int) {
+multi the-lucky-number-is( @a = @Test[1] --> Int) {
     my @w = @a.&____.sort;
-say @w.raku;
     die 'Non-distinct data' unless @w.sort eqv @w.unique.sort;
 
-    my @lucky;
-
-    my @row-min = @a.map( *.min( :p)[0]);                   # ??????
-    for @row-min -> $p {
-say $p;
-say "A col-max ", (@a[ 0..^@a, $p.key]).max; 
-        my $col-max = @a[ 0..^@a, $p.key].max; 
-        @lucky.push( $p.value) if $col-max == $p.value;
-    }
-    say @lucky.raku;
-    return @lucky;
+    my @min = @a.map: *.min;
+    my @max = do for 0..^@a[0] -> $col { @a[ 0..^@a ;$col].max; }
+    my $ret = @min ∩ @max;
+    return -1 if $ret ~~ Set.new();
+    $ret.keys[0];
 }
-=finish
 
 for @Test -> $exp, $in {
-    is the-lucky-number-is($in), $exp, "$exp <- $in";
+    is the-lucky-number-is($in), $exp, "$exp <- $in.raku()";
 }
 
 done-testing;
-my @X = X;
 
 exit;