package DynamicProgramming; // Partition a set into two subsets such that the difference of subset sums is minimum /* Input: arr[] = {1, 6, 11, 5} Output: 1 Explanation: Subset1 = {1, 5, 6}, sum of Subset1 = 12 Subset2 = {11}, sum of Subset2 = 11 Input: arr[] = {36, 7, 46, 40} Output: 23 Explanation: Subset1 = {7, 46} ; sum of Subset1 = 53 Subset2 = {36, 40} ; sum of Subset2 = 76 */ import java.util.*; import java.lang.*; import java.io.*; public class MinimumSumPartition { public static int subSet(int arr[]){ int n = arr.length; int sum = getSum(arr); boolean dp[][] = new boolean[n+1][sum+1]; for(int i = 0; i < n; i++){ dp[i][0] = true; } for(int j = 0; j < sum; j++){ dp[0][j] = false; } //fill dp array for(int i = 1; i <= n; i++){ for(int j = 1; j <= sum; j++){ if(arr[i-1] < j){ dp[i][j] = dp[i-1][j - arr[i-1]] || dp[i-1][j]; } else if(arr[i-1] == j){ dp[i][j] = true; } else{ dp[i][j] = dp[i-1][j]; } } } // fill the index array int index[] = new int[sum]; int p = 0; for(int i = 0; i <= sum / 2; i++){ if(dp[n][i]){ index[p++] = i; } } return getMin(index, sum); } public static int getSum(int arr[]){ if(arr.length <= 0){ return 0; } int sum = 0; for(int i = 0; i < arr.length; i++){ sum += arr[i]; } return sum; } public static int getMin(int[] arr, int sum) { if (arr.length == 0) { return 0; } int min = Integer.MAX_VALUE; for (int temp : arr) { min = Math.min(min, sum - 2 * temp); } return min; } public static void main(String args[]){ Scanner in = new Scanner(System.in); int n = in.nextInt(); int arr[] = new int[n]; for(int i = 0 ; i