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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
namespace PalindromePartitioningIII
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
}
public int PalindromePartition(string s, int k)
{
int min = int.MaxValue;
DFS(s, new List<string>(), k, ref min);
return min;
}
public void DFS(string remain, List<string> parts, int k, ref int min)
{
if(remain.Length < k - parts.Count) return;
if (parts.Count == k)
{
if (remain.Length == 0)
{
int sum = 0;
foreach (var part in parts)
sum += Count(part);
min = Math.Min(min, sum);
}
return;
}
for (int i = 0; i <= remain.Length; i++)
{
var part = remain.Substring(0, i);
if(Count(part) >= min) continue;
parts.Add(part);
DFS(remain.Substring(i), parts, k, ref min);
parts.RemoveAt(parts.Count - 1);
}
}
public int Count(string s)
{
int count = 0, li = 0, hi = s.Length - 1;
while (li < hi)
if (s[li++] != s[hi--]) count++;
return count;
}
}
}