Submission #857144


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#include<iostream>
#include<iomanip>
#include<algorithm>
#include<array>
#include<bitset>
#include<cassert>
#include<cctype>
#include<cmath>
#include<cstdio>
#include<cstring>
#include<functional>
#include<limits>
#include<list>
#include<map>
#include<numeric>
#include<set>
#include<stack>
#include<string>
#include<sstream>
#include<queue>
#include<vector>
using namespace std;

using ll = long long;
using ull = unsigned long long;
using pii = pair<int, int>;

#define dump(o) { cerr << #o << " " << o << endl; }
#define dumpc(o) { cerr << #o; for (auto &e : (o)) cerr << " " << e; cerr << endl; }
#define MOD 1000000007
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3fLL

ll f(ll b, ll n) {
	if (b > n)return n;
	return f(b, n / b) + n%b;
}

signed main() {
	ll n, s; cin >> n >> s;
	//for (int h = 1000; h < 2000; h++) {
	//	for (int i = 2; i < n; i++) {
	//		if (f(i, n) == h) {
	//			dump(i);
	//			dump(f(i, n));
	//			break;
	//		}
	//	}
	//}

	//for (int h = 1; h < 1000; h++) {
	//	ll M = 0;
	//	for (int i = 2; i < h; i++) {
	//		if (M < f(i, h)) {
	//			M = f(i, h);
	//		}
	//	}
	//	cout << h << " " << M << endl;
	//}

	if ((n + 1) / 2 < s) {
		cout << -1 << endl;
	}
	else {
		for (ll i = 2; i < n; i++) {
			if (f(i, n) == s) {
				//dump(i);
				//dump(f(i, n));
				cout << i << endl;
				break;
			}
		}
	}
	return 0;
}

Submission Info

Submission Time
Task D - Digit Sum
User minaminao
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1419 Byte
Status WA
Exec Time 2105 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 4
TLE × 1
AC × 29
WA × 4
TLE × 14
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 4 ms 256 KB
subtask1_100000000000_2.txt TLE 2101 ms 256 KB
subtask1_100000000000_3.txt TLE 2101 ms 256 KB
subtask1_100000000000_50000000000.txt TLE 2101 ms 256 KB
subtask1_100000000000_50000000001.txt AC 4 ms 256 KB
subtask1_100000000000_99999999999.txt AC 4 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 4 ms 256 KB
subtask1_2_1.txt WA 4 ms 256 KB
subtask1_2_2.txt WA 4 ms 256 KB
subtask1_31415926535_1.txt TLE 2101 ms 256 KB
subtask1_49234683534_2461734011.txt TLE 2101 ms 256 KB
subtask1_4_1.txt AC 4 ms 256 KB
subtask1_58640129658_232122496.txt TLE 2105 ms 256 KB
subtask1_68719476735_35.txt AC 9 ms 256 KB
subtask1_68719476735_36.txt AC 4 ms 256 KB
subtask1_68719476735_37.txt TLE 2101 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 AC 325 ms 256 KB
subtask1_79285169301_27.txt AC 4 ms 256 KB
subtask1_82914867733_1676425945.txt TLE 2101 ms 256 KB
subtask1_8594813796_75700.txt AC 6 ms 256 KB
subtask1_87654_12345.txt AC 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 894 ms 256 KB
subtask1_98750604051_977728851.txt TLE 2101 ms 256 KB
subtask1_99999515529_1.txt AC 16 ms 256 KB
subtask1_99999515529_316226.txt AC 34 ms 256 KB
subtask1_99999515529_316227.txt AC 16 ms 256 KB
subtask1_99999515529_316228.txt AC 18 ms 256 KB
subtask1_99999515529_49999757765.txt TLE 2101 ms 256 KB
subtask1_99999515529_49999757766.txt AC 4 ms 256 KB
subtask1_99999515530_2.txt AC 16 ms 256 KB
subtask1_99999999977_1.txt TLE 2101 ms 256 KB
subtask1_99999999977_2.txt TLE 2101 ms 256 KB
subtask1_99999999977_49999999989.txt TLE 2105 ms 256 KB
subtask1_99999999977_49999999990.txt AC 4 ms 256 KB
subtask1_99999999999_1.txt TLE 2101 ms 256 KB
subtask1_99999999999_100000000000.txt AC 4 ms 256 KB