Solutions for Challenge-341

challenge-341/vinod-k/perl/ch-1.pl

@@ -0,0 +1,30 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+# Read sentence from standard input
+print("Enter the sentence:\n");
+chomp(my $str = <STDIN>);
+
+# Read broken keys as space-separated input from standard input
+print("Enter the broken keys as space-separated:\n");
+chomp(my $keys_line = <STDIN>);
+my @keys = split /\s+/, $keys_line;
+
+my %broken = map { lc($_) => 1 } @keys;
+my @words = split /\s+/, $str;
+
+my $count = 0;
+foreach my $word (@words) {
+    my $can_type = 1;
+    foreach my $char (split //, lc($word)) {
+        if ($broken{$char}) {
+            $can_type = 0;
+            last;
+        }
+    }
+    $count++ if $can_type;
+}
+
+print "$count\n";

challenge-341/vinod-k/perl/ch-2.pl

@@ -0,0 +1,20 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+print "Enter the string: ";
+chomp(my $str = <STDIN>);
+
+print "Enter the character to reverse prefix until: ";
+chomp(my $char = <STDIN>);
+
+my $index = index($str, $char);
+
+if ($index == -1 || $index == 0) {
+    print "$str\n";
+} else {
+    my $prefix = substr($str, 0, $index + 1);
+    my $reversed = reverse $prefix;
+    print $reversed . substr($str, $index + 1) . "\n";
+}

challenge-341/vinod-k/python/ch-1.py

@@ -0,0 +1,11 @@
+sentence = input("Enter the sentence: ")
+keys_input = input("Enter the broken keys separated by space: ")
+
+broken_keys = set(keys_input.lower().split())
+
+count = 0
+for word in sentence.split():
+    if all(char not in broken_keys for char in word.lower()):
+        count += 1
+
+print(f"Number of words that can be typed: {count}")

challenge-341/vinod-k/python/ch-2.py

@@ -0,0 +1,14 @@
+input_str = input("Enter the string: ")
+char = input("Enter the character to reverse prefix until: ")
+
+index = input_str.find(char)
+
+if index == -1 or index == 0:
+    # No change if character not found or at start
+    result = input_str
+else:
+    prefix = input_str[:index+1]
+    rest = input_str[index+1:]
+    result = prefix[::-1] + rest
+
+print(f"Resulting string: {result}")