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: 249 ms):
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.*;
public class main {
    static PrintWriter pw = new PrintWriter(new BufferedOutputStream(System.out));
    static FastReader in = new FastReader();
    public static int n;  
    public static void main(String[] args) {
        int t = in.nextInt();
        while (t-- > 0) {
            String p = in.next();
            n = p.length();
            long sum = 0;
            for (int i = 0; i < n; i++) {
                int l = p.charAt(i) - '0';
                sum += l;
            }
            if (sum % 9 == 0) {
                pw.println("YES");
            } else {
                sum %= 9;
                sum = 9 - sum;

                int count2 = 0;
                int count3 = 0;
                for (int i = 0; i < n; i++) {
                    int l = p.charAt(i) - '0';
                    if (l == 2) {
                        count2++;
                    } else if (l == 3) {
                        count3++;
                    }
                }
                if (sum % 2 != 0) {
                    sum += 9;
                }
                while(count3 > 0 && sum >= 6) {
                    count3--;
                    sum -= 6;
                }
                while(count2 > 0 && sum >= 2) {
                    count2--;
                    sum -= 2;
                }
                if (sum == 0) {
                    pw.println("YES");
                } else {
                    pw.println("NO");
                }
            }
        }
        pw.close();
    }
    
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

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

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

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

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }
}