Problem:
Score : 600 points

Problem Statement

There is a game that involves three variables, denoted A, B, and C.

As the game progresses, there will be N events where you are asked to make a choice.
Each of these choices is represented by a string s_i. If s_i is AB, you must add 1 to A or B then subtract 1 from the other; if s_i is AC, you must add 1 to A or C then subtract 1 from the other; if s_i is BC, you must add 1 to B or C then subtract 1 from the other.

After each choice, none of A, B, and C should be negative.

Determine whether it is possible to make N choices under this condition. If it is possible, also give one such way to make the choices.

Constraints

1 \leq N \leq 10^5

0 \leq A,B,C \leq 10^9

N, A, B, C are integers.

s_i is AB, AC, or BC.

Input

Input is given from Standard Input in the following format:

N A B C
s_1
s_2
:
s_N

Output

If it is possible to make N choices under the condition, print Yes; otherwise, print No.

Also, in the former case, show one such way to make the choices in the subsequent N lines. The (i+1)-th line should contain the name of the variable (A, B, or C) to which you add 1 in the i-th choice.

Sample Input 1

2 1 3 0
AB
AC

Sample Output 1

Yes
A
C

You can successfully make two choices, as follows:

In the first choice, add 1 to A and subtract 1 from B. A becomes 2, and B becomes 2.

In the second choice, add 1 to C and subtract 1 from A. C becomes 1, and A becomes 1.

Sample Input 2

3 1 0 0
AB
BC
AB

Sample Output 2

No

Sample Input 3

1 0 9 0
AC

Sample Output 3

No

Sample Input 4

8 6 9 1
AC
BC
AB
BC
AC
BC
AB
AB

Sample Output 4

Yes
C
B
B
C
C
B
A
A

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)


import java.util.*;
import java.io.*;

public class Main {

    public static void main(String[] args) throws IOException {
        Scanner sc = new Scanner(System.in);
        PrintWriter pw = new PrintWriter(System.out);
        int n = sc.nextInt();
        int [] vals = sc.nextIntArr(3);
        long sum =1l*vals[0]+vals[1]+vals[2];
        int[][]nxt = new int[3][n+1];
        nxt[0][n]=nxt[1][n]=nxt[2][n]=n;
        char[][]a= new char[n][2];
        for (int i =0;i<n;i++)a[i]=sc.next().toCharArray();
        for (int i =n-1;i>=0;i--){
            for (int j =0;j<3;j++)
                nxt[j][i]=nxt[j][i+1];
            nxt[a[i][0]-'A'][i]=i;
            nxt[a[i][1]-'A'][i]=i;
        }
        if (sum==0)
            pw.println("No");
        else {
            boolean valid = true;
            StringBuilder sol = new StringBuilder();
            for (int i =0;i<n;i++){
                char[]s = a[i];
                int id1=s[0]-'A';
                int id2=s[1]-'A';
                if (vals[id1]==vals[id2]&&vals[id1]==0){
                    valid=false;
                    break;
                }
                if (vals[id1]>vals[id2]){
                     sol.append(s[1]+"\n");
                     vals[id2]++;
                     vals[id1]--;
                }
                else if (vals[id1]<vals[id2]){
                    sol.append(s[0]+"\n");
                    vals[id2]--;
                    vals[id1]++;
                }
                else {
                    if (nxt[id1][i]<nxt[id2][i]){
                        sol.append(s[0]+"\n");
                        vals[id2]--;
                        vals[id1]++;
                    }
                    else {
                        sol.append(s[1]+"\n");
                        vals[id2]++;
                        vals[id1]--;
                    }
                }
            }
            if (valid){
                pw.println("Yes");
                pw.print(sol);
            }
            else pw.println("No");
        }
        pw.close();

    }
    static class Scanner {
        BufferedReader br;
        StringTokenizer st;

        public Scanner(InputStream s) {
            br = new BufferedReader(new InputStreamReader(s));
        }

        public String next() throws IOException {
            while (st == null || !st.hasMoreTokens())
                st = new StringTokenizer(br.readLine());
            return st.nextToken();
        }

        public int nextInt() throws IOException {
            return Integer.parseInt(next());
        }

        public long nextLong() throws IOException {
            return Long.parseLong(next());
        }

        public double nextDouble() throws IOException {
            return Double.parseDouble(next());
        }

        public int[] nextIntArr(int n) throws IOException {
            int[] arr = new int[n];
            for (int i = 0; i < n; i++) {
                arr[i] = Integer.parseInt(next());
            }
            return arr;
        }

    }

}