Submission #860472


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#include <iostream>
using namespace std;

typedef long long ll;
ll n, s, b;

ll f(ll b, ll n){
	ll res = 0;
	while(n >= b){
		res += n % b;
		n = n / b;
		if(res > s) return -1;
	}
	res += n;
	return res;
}

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);

	cin >> n >> s;

	for(b=2; b*b<=n; b++){
		if(f(b, n) == s){
			cout << b << endl;
			return 0;
		}
	}
	ll p = b;

	for(; p>0; p--){
		b = 1 + (n-s) / p;
		if(0 <= p && p < b && s-b < p && p <= s){
			cout << b << endl;
			return 0;
		}
	}

	if(n==s){
		cout << n << endl;
		return 0;
	}

	cout << -1 << endl;

	return 0;
}

Submission Info

Submission Time
Task D - Digit Sum
User suzume
Language C++14 (GCC 5.4.1)
Score 0
Code Size 636 Byte
Status WA
Exec Time 21 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 5
AC × 35
WA × 12
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 4 ms 256 KB
subtask1_100000000000_100000000000.txt WA 21 ms 256 KB
subtask1_100000000000_2.txt AC 15 ms 256 KB
subtask1_100000000000_3.txt WA 18 ms 256 KB
subtask1_100000000000_50000000000.txt AC 21 ms 256 KB
subtask1_100000000000_50000000001.txt AC 21 ms 256 KB
subtask1_100000000000_99999999999.txt AC 21 ms 256 KB
subtask1_16983563041_1.txt AC 4 ms 256 KB
subtask1_1_1.txt WA 4 ms 256 KB
subtask1_1_2.txt AC 4 ms 256 KB
subtask1_1_31415926535.txt AC 4 ms 256 KB
subtask1_239484768_194586924.txt AC 5 ms 256 KB
subtask1_2_1.txt AC 4 ms 256 KB
subtask1_2_2.txt WA 4 ms 256 KB
subtask1_31415926535_1.txt AC 10 ms 256 KB
subtask1_49234683534_2461734011.txt WA 16 ms 256 KB
subtask1_4_1.txt AC 4 ms 256 KB
subtask1_58640129658_232122496.txt WA 17 ms 256 KB
subtask1_68719476735_35.txt AC 6 ms 256 KB
subtask1_68719476735_36.txt AC 4 ms 256 KB
subtask1_68719476735_37.txt AC 13 ms 256 KB
subtask1_68719476736_1.txt AC 4 ms 256 KB
subtask1_68719476736_2.txt AC 4 ms 256 KB
subtask1_72850192441_16865701.txt WA 21 ms 256 KB
subtask1_79285169301_27.txt AC 4 ms 256 KB
subtask1_82914867733_1676425945.txt WA 19 ms 256 KB
subtask1_8594813796_75700.txt AC 6 ms 256 KB
subtask1_87654_12345.txt WA 4 ms 256 KB
subtask1_87654_138.txt AC 4 ms 256 KB
subtask1_87654_30.txt AC 4 ms 256 KB
subtask1_87654_4294967308.txt AC 4 ms 256 KB
subtask1_87654_45678.txt AC 4 ms 256 KB
subtask1_97822032312_49157112.txt AC 20 ms 256 KB
subtask1_98750604051_977728851.txt AC 20 ms 256 KB
subtask1_99999515529_1.txt AC 10 ms 256 KB
subtask1_99999515529_316226.txt WA 16 ms 256 KB
subtask1_99999515529_316227.txt AC 18 ms 256 KB
subtask1_99999515529_316228.txt WA 15 ms 256 KB
subtask1_99999515529_49999757765.txt AC 21 ms 256 KB
subtask1_99999515529_49999757766.txt AC 20 ms 256 KB
subtask1_99999515530_2.txt AC 10 ms 256 KB
subtask1_99999999977_1.txt AC 15 ms 256 KB
subtask1_99999999977_2.txt WA 15 ms 256 KB
subtask1_99999999977_49999999989.txt AC 21 ms 256 KB
subtask1_99999999977_49999999990.txt AC 21 ms 256 KB
subtask1_99999999999_1.txt AC 15 ms 256 KB
subtask1_99999999999_100000000000.txt AC 21 ms 256 KB