Submission #858114


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

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		Printer pr = new Printer(System.out);

		long n = sc.nextLong();
		long s = sc.nextLong();

		out:
		if (n == s) {
			pr.println(n + 1);
		} else if (n < s) {
			pr.println(-1);
		} else {
			for (long b = 2; b < 1_000_000; b++) {
				long ret = 0;
				long tmp = n;
				while (tmp > 0) {
					ret += tmp % b;
					tmp /= b;
				}

				if (ret == s) {
					pr.println(b);

					break out;
				}
			}

			for (long p = Math.min(1_000_000, s); p >= 1; p--) {
				if ((n - s) % p == 0) {
					long b = (n - s) / p + 1;

					if (s - p < b) {
						pr.println(b);

						break out;
					}
				}
			}

			pr.println(-1);
		}

		pr.close();
		sc.close();
	}

	@SuppressWarnings("unused")
	private static class Scanner {
		BufferedReader br;
		Iterator<String> it;

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

		String next() throws RuntimeException  {
			try {
				if (it == null || !it.hasNext()) {
//					it = Arrays.asList(br.readLine().split(" ")).iterator();
					it = Arrays.asList(br.readLine().split("\\p{javaWhitespace}+")).iterator();
				}
				return it.next();
			} catch (IOException e) {
				throw new IllegalStateException();
			}
		}

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

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

		float nextFloat() throws RuntimeException {
			return Float.parseFloat(next());
		}

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

		void close() {
			try {
				br.close();
			} catch (IOException e) {
//				throw new IllegalStateException();
			}
		}
	}

	private static class Printer extends PrintWriter {
		Printer(PrintStream out) {
			super(out);
		}
	}
}

Submission Info

Submission Time
Task D - Digit Sum
User garnacha
Language Java8 (OpenJDK 1.8.0)
Score 500
Code Size 2011 Byte
Status AC
Exec Time 266 ms
Memory 9684 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 500 / 500
Status
AC × 5
AC × 47
Set Name Test Cases
Sample subtask1_87654_30.txt, subtask1_87654_138.txt, subtask1_87654_45678.txt, subtask1_31415926535_1.txt, subtask1_1_31415926535.txt
All subtask1_100000000000_1.txt, subtask1_100000000000_100000000000.txt, subtask1_100000000000_2.txt, subtask1_100000000000_3.txt, subtask1_100000000000_50000000000.txt, subtask1_100000000000_50000000001.txt, subtask1_100000000000_99999999999.txt, subtask1_16983563041_1.txt, subtask1_1_1.txt, subtask1_1_2.txt, subtask1_1_31415926535.txt, subtask1_239484768_194586924.txt, subtask1_2_1.txt, subtask1_2_2.txt, subtask1_31415926535_1.txt, subtask1_49234683534_2461734011.txt, subtask1_4_1.txt, subtask1_58640129658_232122496.txt, subtask1_68719476735_35.txt, subtask1_68719476735_36.txt, subtask1_68719476735_37.txt, subtask1_68719476736_1.txt, subtask1_68719476736_2.txt, subtask1_72850192441_16865701.txt, subtask1_79285169301_27.txt, subtask1_82914867733_1676425945.txt, subtask1_8594813796_75700.txt, subtask1_87654_12345.txt, subtask1_87654_138.txt, subtask1_87654_30.txt, subtask1_87654_4294967308.txt, subtask1_87654_45678.txt, subtask1_97822032312_49157112.txt, subtask1_98750604051_977728851.txt, subtask1_99999515529_1.txt, subtask1_99999515529_316226.txt, subtask1_99999515529_316227.txt, subtask1_99999515529_316228.txt, subtask1_99999515529_49999757765.txt, subtask1_99999515529_49999757766.txt, subtask1_99999515530_2.txt, subtask1_99999999977_1.txt, subtask1_99999999977_2.txt, subtask1_99999999977_49999999989.txt, subtask1_99999999977_49999999990.txt, subtask1_99999999999_1.txt, subtask1_99999999999_100000000000.txt
Case Name Status Exec Time Memory
subtask1_100000000000_1.txt AC 156 ms 8404 KB
subtask1_100000000000_100000000000.txt AC 166 ms 8400 KB
subtask1_100000000000_2.txt AC 231 ms 9044 KB
subtask1_100000000000_3.txt AC 231 ms 9044 KB
subtask1_100000000000_50000000000.txt AC 258 ms 9684 KB
subtask1_100000000000_50000000001.txt AC 251 ms 9044 KB
subtask1_100000000000_99999999999.txt AC 254 ms 9556 KB
subtask1_16983563041_1.txt AC 163 ms 8404 KB
subtask1_1_1.txt AC 163 ms 8276 KB
subtask1_1_2.txt AC 163 ms 8400 KB
subtask1_1_31415926535.txt AC 160 ms 8400 KB
subtask1_239484768_194586924.txt AC 239 ms 9556 KB
subtask1_2_1.txt AC 166 ms 8272 KB
subtask1_2_2.txt AC 170 ms 8272 KB
subtask1_31415926535_1.txt AC 234 ms 9044 KB
subtask1_49234683534_2461734011.txt AC 255 ms 9044 KB
subtask1_4_1.txt AC 167 ms 8404 KB
subtask1_58640129658_232122496.txt AC 254 ms 9044 KB
subtask1_68719476735_35.txt AC 198 ms 9172 KB
subtask1_68719476735_36.txt AC 170 ms 8272 KB
subtask1_68719476735_37.txt AC 238 ms 8916 KB
subtask1_68719476736_1.txt AC 167 ms 8404 KB
subtask1_68719476736_2.txt AC 163 ms 8276 KB
subtask1_72850192441_16865701.txt AC 266 ms 9040 KB
subtask1_79285169301_27.txt AC 170 ms 8276 KB
subtask1_82914867733_1676425945.txt AC 247 ms 9044 KB
subtask1_8594813796_75700.txt AC 175 ms 9044 KB
subtask1_87654_12345.txt AC 178 ms 8400 KB
subtask1_87654_138.txt AC 170 ms 8276 KB
subtask1_87654_30.txt AC 157 ms 8404 KB
subtask1_87654_4294967308.txt AC 163 ms 8276 KB
subtask1_87654_45678.txt AC 199 ms 9556 KB
subtask1_97822032312_49157112.txt AC 246 ms 9040 KB
subtask1_98750604051_977728851.txt AC 250 ms 9044 KB
subtask1_99999515529_1.txt AC 195 ms 9044 KB
subtask1_99999515529_316226.txt AC 235 ms 9164 KB
subtask1_99999515529_316227.txt AC 195 ms 9044 KB
subtask1_99999515529_316228.txt AC 197 ms 9044 KB
subtask1_99999515529_49999757765.txt AC 251 ms 9172 KB
subtask1_99999515529_49999757766.txt AC 239 ms 9044 KB
subtask1_99999515530_2.txt AC 214 ms 9556 KB
subtask1_99999999977_1.txt AC 230 ms 9040 KB
subtask1_99999999977_2.txt AC 250 ms 9556 KB
subtask1_99999999977_49999999989.txt AC 247 ms 9040 KB
subtask1_99999999977_49999999990.txt AC 247 ms 9044 KB
subtask1_99999999999_1.txt AC 227 ms 8916 KB
subtask1_99999999999_100000000000.txt AC 162 ms 8404 KB