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Subset2.cs
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Subset2.cs
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using System;
using System.Collections.Generic;
using System.Linq;
public class Subset2{
static void Main(string [] args){
int [] data = new int []{4,4,4,1,4};
var list = SubsetsWithDup(data);
Console.WriteLine(list.Count);
}
static IList<IList<int>> SubsetsWithDup(int[] nums){
IList<int> temp=new List<int>();
IList<IList<int>> res = new List<IList<int>>();
res.Add(temp);
res.Add(nums.ToList());
for(int i=1;i<nums.Length;i++){
int [] data = new int [i];
combinationUtil(nums,nums.Length,data,i,0,0,res);
}
return res;
}
static void combinationUtil(int [] arr,int n,int [] data,int r,int index,int i ,IList<IList<int>> res){
if(index==r){
foreach(var a in res){
List<int> t=a.ToList();
t.Sort();
var temp = data.ToList();
temp.Sort();
if(t.SequenceEqual(temp)){
return;
}
}
res.Add(data.ToList());
return;
}
if(i>=n) return;
data[index]=arr[i];
combinationUtil(arr,n,data,r,index+1,i+1,res);
combinationUtil(arr,n,data,r,index,i+1,res);
}
}