#include<bits/stdc++.h>
using namespace std;
int first(int q){
    int s;
    while(q>9){
 
        q=q/10;
    }
    return q%10;;
}
int main(){
    int n;
    cin>>n;
    int a[n];
    for(int i=0;i<n;i++)
    cin>>a[i];
    int d=0;
    for(int i=0;i<n/2;i++){
        d=d*10+first(a[i]);
        cout<<d<<"\n";
    }
    for(int i=n/2;i<n;i++){
        d=d*10+(a[i]%10);
    }
    //cout<<d;
    if(d%11==0)
    cout<<"YES!"<<"\n";
    else
    cout<<"NO:("<<"\n";
}

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NgoxMjM0IDQzMjEgMjM0NSA1NDMgMTExIDg4OA==

6
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