Submission #5664258


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


public class Main {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		long n = sc.nextLong();
		long s = sc.nextLong();

		if (n < s) {
			pr.println(-1);
			return;
		}
		if (n == s) {
			pr.println(n + 1);
			return;
		}

		long ans = INF;
		for (int b = 2; b < Math.min(n, 1_000_000); b++) {
			if (f(n, b) == s) {
				ans = Math.min(ans, b);
			}
		}

		for (int p = 1; p < Math.min(n, 1_000_000); p++) {
			long b = (n - s)  / p + 1;
			if (p < b && f(n, b) == s) {
				ans = Math.min(ans, b);
			}
		}

		if (ans == INF) {
			pr.println(-1);
		} else {
			pr.println(ans);
		}

	}
	
	static final long INF = Long.MAX_VALUE;

	private static long f(long n, long b) {
		long sum = 0;
		while (n > 0) {
			sum += n % b;
			n /= b;
		}
		
		return sum;
	}

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

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

Submission Info

Submission Time
Task D - Digit Sum
User garnacha
Language Java8 (OpenJDK 1.8.0)
Score 500
Code Size 1229 Byte
Status AC
Exec Time 167 ms
Memory 24148 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 159 ms 19668 KB
subtask1_100000000000_100000000000.txt AC 94 ms 20688 KB
subtask1_100000000000_2.txt AC 159 ms 22100 KB
subtask1_100000000000_3.txt AC 159 ms 21204 KB
subtask1_100000000000_50000000000.txt AC 155 ms 22228 KB
subtask1_100000000000_50000000001.txt AC 156 ms 22356 KB
subtask1_100000000000_99999999999.txt AC 148 ms 21200 KB
subtask1_16983563041_1.txt AC 153 ms 19540 KB
subtask1_1_1.txt AC 94 ms 18644 KB
subtask1_1_2.txt AC 92 ms 21204 KB
subtask1_1_31415926535.txt AC 95 ms 21076 KB
subtask1_239484768_194586924.txt AC 144 ms 23892 KB
subtask1_2_1.txt AC 92 ms 21844 KB
subtask1_2_2.txt AC 93 ms 19412 KB
subtask1_31415926535_1.txt AC 153 ms 22228 KB
subtask1_49234683534_2461734011.txt AC 156 ms 20180 KB
subtask1_4_1.txt AC 94 ms 18644 KB
subtask1_58640129658_232122496.txt AC 157 ms 20308 KB
subtask1_68719476735_35.txt AC 162 ms 22228 KB
subtask1_68719476735_36.txt AC 156 ms 20308 KB
subtask1_68719476735_37.txt AC 157 ms 22356 KB
subtask1_68719476736_1.txt AC 161 ms 19412 KB
subtask1_68719476736_2.txt AC 156 ms 20308 KB
subtask1_72850192441_16865701.txt AC 155 ms 20308 KB
subtask1_79285169301_27.txt AC 158 ms 19284 KB
subtask1_82914867733_1676425945.txt AC 156 ms 22228 KB
subtask1_8594813796_75700.txt AC 150 ms 22228 KB
subtask1_87654_12345.txt AC 108 ms 22484 KB
subtask1_87654_138.txt AC 108 ms 20308 KB
subtask1_87654_30.txt AC 107 ms 20308 KB
subtask1_87654_4294967308.txt AC 95 ms 19284 KB
subtask1_87654_45678.txt AC 108 ms 19924 KB
subtask1_97822032312_49157112.txt AC 157 ms 19280 KB
subtask1_98750604051_977728851.txt AC 159 ms 19152 KB
subtask1_99999515529_1.txt AC 164 ms 21716 KB
subtask1_99999515529_316226.txt AC 161 ms 22356 KB
subtask1_99999515529_316227.txt AC 167 ms 22228 KB
subtask1_99999515529_316228.txt AC 163 ms 21072 KB
subtask1_99999515529_49999757765.txt AC 158 ms 19796 KB
subtask1_99999515529_49999757766.txt AC 164 ms 20308 KB
subtask1_99999515530_2.txt AC 161 ms 22356 KB
subtask1_99999999977_1.txt AC 160 ms 22356 KB
subtask1_99999999977_2.txt AC 160 ms 21072 KB
subtask1_99999999977_49999999989.txt AC 157 ms 24148 KB
subtask1_99999999977_49999999990.txt AC 156 ms 19796 KB
subtask1_99999999999_1.txt AC 160 ms 19796 KB
subtask1_99999999999_100000000000.txt AC 94 ms 21588 KB