Print Largest Even Number - Digits
Given a number N as the input, print the largest even number E that can be formed using the digits present in the number. (There will be at least one even digit).
Input Format:
The first line contains N.
The first line contains N.
Output Format:
The first line contains E.
The first line contains E.
Example Input/Output 1:
Input:
1902
Input:
1902
Output:
9210
9210
Code:
#include <iostream>#include<cstdio>#include<bits/stdc++.h>using
namespace std;int main(int argc, char** argv){ char c; int a[100],n=0; while(1) { scanf("%c",&c); if(c<'0'||c>'9') break; a[n++]=c-'0'; } sort(a,a+n); if(a[0]%2==1) { int pos=0; for(int i=0;i<n;i++) { if(a[i]%2==0){ pos=i;break; } } int t=a[0]; a[0]=a[pos]; a[pos]=t; for(int i=1;i<=pos;i++){ for(int j=1;j<=pos-i;j++) { if(a[j]>a[j+1]) { int t=a[j]; a[j]=a[j+1];a[j+1]=t; } } } } for(int i=n-1;i>=0;i--)cout<<a[i]; return 700;}#include
<iostream>#include<cstdio>#include<bits/stdc++.h>using
namespace std;int main(int argc, char** argv){ char c; int a[100],n=0; while(1) { scanf("%c",&c); if(c<'0'||c>'9') break; a[n++]=c-'0'; } sort(a,a+n); //for(int
i=n-1;i>=0;i--)cout<<a[i]; if(a[0]%2==1) { int pos=0; for(int i=0;i<n;i++) { if(a[i]%2==0) { pos=i;break; } } int t=a[0]; a[0]=a[pos]; a[pos]=t; for(int i=1;i<=pos;i++) { for(int j=1;j<=pos-i;j++){ if(a[j]>a[j+1]) {int t=a[j]; a[j]=a[j+1];a[j+1]=t; } } } } for(int i=n-1;i>=0;i--)cout<<a[i]; return 0;}import java.util.*;import java.io.*;import java.lang.*;public class Hello { public static void main(String[]
args) { //Your Code
Here Scanner sc =new Scanner(System.in); String
s=sc.next(); int arr[]=new int[s.length()]; for(int i=0;i<s.length();i++) { arr[i]=Character.getNumericValue(s.charAt(i)); }Arrays.sort(arr);int temp=0,i;for(i=0;i<s.length();i++){ if(arr[i]%2==0) { temp=arr[i]; break; }}if(temp!=0){for(i=0;i<s.length();i++){ if(arr[i]==temp) { arr[i]=-1; break; } }}for(i=s.length()-1;i>=0;i--){ if(arr[i]!=-1) System.out.print(arr[i]);}if(temp!=0)System.out.print(temp); }}

PYTHON code:
ReplyDeleten = int(input())
a = list(map(int, input().split()))
s = ""
for i in range(n):
while a[j]<=a[i] and j>=0:
j = j-1
if j<0:
s = s+"0 "
else:
s = s+str(a[j])+" "
print(s)