Problem: 2050C - Uninteresting Number
Language: java

Solution 1 (runtime: 312 ms):
import java.util.*;
public class practice {
    public static boolean unintrestingNumber(String n){
        int count = 0;
        int count2 = 0;
        int count3 = 0;
        for(int i = 0; i<n.length();i++){
            String Snum = String.valueOf(n.charAt(i));
            int num = Integer.parseInt(Snum);
            count+=num;
            if (num == 2){
                count2++;
            }
            if (num == 3){
                count3++;
            }
        }
        int newSum = count;
        for (int i = 0; i <= Math.min(9, count2); i++) {
            for (int j = 0; j <= Math.min(9, count3); j++) {
                if ((newSum + i * 2 + j * 6) % 9 == 0) {
                    return true; 
                }
            }
        }
        return false;
    }
    
    public static void main(String[] args){
        Scanner myScan = new Scanner(System.in);
        int testcases = myScan.nextInt();
        for (int i = 0; i<=testcases; i++){
            String test = myScan.nextLine();
            if (!"".equals(test)){
                if(unintrestingNumber(test)){
                    System.out.println("YES");
                }
                else{
                    System.out.println("NO");
                }
            }
        }
    }
}


Solution 2 (runtime: 311 ms):
import java.io.*;
import java.util.*;

public class UninterestingNumber {
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer tokenizer = new StringTokenizer(in.readLine());

        int t = Integer.parseInt(tokenizer.nextToken());
        ArrayList<String> ans = new ArrayList<>();

        for (int i = 0; i < t; i++) {
            tokenizer = new StringTokenizer(in.readLine());
            String n = tokenizer.nextToken();
            int num = simplify(n);

            if (num == 0) {
                ans.add("YES");
                continue;
            }

            int num2 = numTwos(n);
            int num3 = numThrees(n);

            boolean canAdd = false;

            if (num == 1) {
                if (num3 >= 1 && num2 >= 1) {
                    canAdd = true;
                } else if (num2 >= 4) {
                    canAdd = true;
                }
            } else if (num == 2) {
                if (num3 >= 2 && num2 >= 2) {
                    canAdd = true;
                } else if (num3 == 1 && num2 >= 5) {
                    canAdd = true;
                } else if (num2 >= 8) {
                    canAdd = true;
                }
            } else if (num == 3) {
                if (num3 >= 1 || num2 >= 3) {
                    canAdd = true;
                }
            } else if (num == 4) {
                if (num3 >= 2 && num2 >= 1) {
                    canAdd = true;
                } else if (num3 == 1 && num2 >= 4) {
                    canAdd = true;
                } else if (num2 >= 7) {
                    canAdd = true;
                }
            } else if (num == 5) {
                if (num2 >= 2) {
                    canAdd = true;
                }
            } else if (num == 6) {
                if (num3 >= 2) {
                    canAdd = true;
                } else if (num3 == 1 && num2 >= 3) {
                    canAdd = true;
                } else if (num2 >= 6) {
                    canAdd = true;
                }
            } else if (num == 7) {
                if (num2 >= 1) {
                    canAdd = true;
                }
            } else if (num == 8) {
                if (num3 >= 1 && num2 >= 2) {
                    canAdd = true;
                } else if (num2 >= 5) {
                    canAdd = true;
                }
            }

            if (canAdd) {
                ans.add("YES");
                continue;
            }
            ans.add("NO");
        }

        for (String s : ans) {
            System.out.println(s);
        }
    }

    public static int numTwos(String x) {
        int ret = 0;
        for (char a : x.toCharArray()) {
            if ((a - '0') == 2) ret++;
        }
        return ret;
    }

    public static int numThrees(String x) {
        int ret = 0;
        for (char a : x.toCharArray()) {
            if ((a - '0') == 3) ret++;
        }
        return ret;
    }

    public static int simplify(String x) {
        int ret = 0;
        for (char a : x.toCharArray()) {
            ret += (a - '0');
        }
        return ret % 9;
    }
}