Submission #858976


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/* template.cpp [[[ */
#include <bits/stdc++.h>
using namespace std;
#define get_macro(a, b, c, d, name, ...) name
#define rep(...) get_macro(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep(...) get_macro(__VA_ARGS__, rrep4, rrep3, rrep2, rrep1)(__VA_ARGS__)
#define rep1(n) rep2(i_, n)
#define rep2(i, n) rep3(i, 0, n)
#define rep3(i, a, b) rep4(i, a, b, 1)
#define rep4(i, a, b, s) for (ll i = (a); i < (ll)(b); i += (ll)s)
#define rrep1(n) rrep2(i_, n)
#define rrep2(i, n) rrep3(i, 0, n)
#define rrep3(i, a, b) rrep4(i, a, b, 1)
#define rrep4(i, a, b, s) for (ll i = (ll)(b) - 1; i >= (ll)(a); i -= (ll)s)
#define each(x, c) for (auto &&x : c)
#define fs first
#define sc second
#define all(c) begin(c), end(c)
using ui = unsigned;
using ll = long long;
using ul = unsigned long long;
using ld = long double;
const int inf = 1e9 + 10;
const ll inf_ll = 1e18 + 10;
const ll mod = 1e9 + 7;
const ll mod9 = 1e9 + 9;
const int dx[]{-1, 0, 1, 0, -1, 1, 1, -1};
const int dy[]{0, -1, 0, 1, -1, -1, 1, 1};
template<class T, class U> void chmin(T &x, const U &y){ x = min<T>(x, y); }
template<class T, class U> void chmax(T &x, const U &y){ x = max<T>(x, y); }
struct prepare_ { prepare_(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(12); } } prepare__;
/* ]]] */

int main(){
  ll n, s;
  cin >> n >> s;
  if (n == s) cout << n + 1 << endl, exit(0);
  ll res = inf_ll;
  rep(i, 2, n){
    if (i * i >= n) break;
    ll x = n, t = 0;
    while (x) t += x % i, x /= i;
    if (s == t) chmin(res, i);
  }
  rep(i, 1, n){
    if (i * i > n) break;
    if ((n - (s - i)) % i) continue;
    ll b = (n - (s - i)) / i;
    if (s - i >= b) continue;
    if (i * b + s - i != n) continue;
    if (s - i < 0) continue;
    chmin(res, b);
  }
  cout << (res == inf_ll ? -1 : res) << endl;
}

Submission Info

Submission Time
Task C - Tak and Cards
User jin_matakich
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1881 Byte
Status WA
Exec Time 6 ms
Memory 256 KB

Judge Result

Set Name Sample Subtask1 All
Score / Max Score 0 / 0 0 / 200 0 / 100
Status
WA × 4
WA × 12
WA × 24
Set Name Test Cases
Sample example_01.txt, example_02.txt, example_03.txt, example_04.txt
Subtask1 example_01.txt, example_02.txt, example_03.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt
All example_01.txt, example_02.txt, example_03.txt, example_04.txt, subtask1_01.txt, subtask1_02.txt, subtask1_03.txt, subtask1_04.txt, subtask1_05.txt, subtask1_06.txt, subtask1_07.txt, subtask1_08.txt, subtask1_09.txt, subtask2_01.txt, subtask2_02.txt, subtask2_03.txt, subtask2_04.txt, subtask2_05.txt, subtask2_06.txt, subtask2_07.txt, subtask2_08.txt, subtask2_09.txt, subtask2_10.txt, subtask2_11.txt
Case Name Status Exec Time Memory
example_01.txt WA 4 ms 256 KB
example_02.txt WA 4 ms 256 KB
example_03.txt WA 4 ms 256 KB
example_04.txt WA 4 ms 256 KB
subtask1_01.txt WA 4 ms 256 KB
subtask1_02.txt WA 4 ms 256 KB
subtask1_03.txt WA 4 ms 256 KB
subtask1_04.txt WA 4 ms 256 KB
subtask1_05.txt WA 4 ms 256 KB
subtask1_06.txt WA 4 ms 256 KB
subtask1_07.txt WA 4 ms 256 KB
subtask1_08.txt WA 4 ms 256 KB
subtask1_09.txt WA 4 ms 256 KB
subtask2_01.txt WA 6 ms 256 KB
subtask2_02.txt WA 4 ms 256 KB
subtask2_03.txt WA 4 ms 256 KB
subtask2_04.txt WA 4 ms 256 KB
subtask2_05.txt WA 4 ms 256 KB
subtask2_06.txt WA 4 ms 256 KB
subtask2_07.txt WA 4 ms 256 KB
subtask2_08.txt WA 4 ms 256 KB
subtask2_09.txt WA 4 ms 256 KB
subtask2_10.txt WA 4 ms 256 KB
subtask2_11.txt WA 4 ms 256 KB