2767

Author: theforestvn88

2701-2800/2767_partition_string_into_minimum_beautiful_substrings.rb

@@ -0,0 +1,27 @@
+# @param {String} s
+# @return {Integer}
+def minimum_beautiful_substrings(s)
+    return -1 if s[0] == '0' || s[-1] == '0'
+
+    is_power_of_five = lambda { |num|
+        while num > 1 && (num % 5 == 0)
+            num /= 5
+        end
+
+        num == 1
+    }
+
+    dp = Array.new(s.length+1, Float::INFINITY)
+    dp[s.length] = 0
+
+    (s.length-1).downto(0) { |i|
+        next if s[i] == '0'
+        (i...s.length).each { |j|
+            if is_power_of_five.call(s[i..j].to_i(2))
+                dp[i] = [dp[i], 1 + dp[j+1]].min
+            end
+        }
+    }
+
+    dp[0] == Float::INFINITY ? -1 : dp[0]
+end