import java.io.BufferedReader; import java.io.InputStreamReader; import java.util.Arrays; public class Solution2 { public static void main(String[] args) throws Exception { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String input = br.readLine(); String arr[] = input.split(" "); int answer = 0; int[] nums = Arrays.asList(arr).stream().mapToInt(Integer::parseInt).toArray(); if(nums[0] + nums[2] < nums[1]){ answer = (nums[0] + nums[2]) * 2; } else if(nums[1] + nums[2] < nums[0]){ answer = (nums[1] + nums[2]) *2 ; } else{ for (int i = 0; i < nums.length; i++) { answer += nums[i]; } if(answer % 2 == 1){ answer -=1; } } System.out.println(answer); } }