Submission #857363


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#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;

#ifndef ONLINE_JUDGE
#define dbg(x) cerr << __LINE__ << " : " << #x << " = " << (x) << endl;
#else
#define dbg(x)
#endif

#define X first
#define Y second

ll f(ll base, ll num){
    ll res = 0;
    while (num){
        res += num % base;
        num /= base;
    }
    return res;
}


int main(){
    std::ios_base::sync_with_stdio(false);
    ll n, s; cin >> n >> s;
    if (n == s) {
        cout << n + 1 << endl;
        return 0;
    }
    for (ll i = 2; i * i <= n; i++){
        if (f(i, n) == s){
            cout << i << endl;
            return 0;
        }
    }
    ll rt = sqrt(n);
    while (rt * rt < n) rt++;
    ll ans = LLONG_MAX;
    for (ll q = min(s, rt); q >= 1; q--){
        ll r = s - q;
        if ((n - r) % q == 0){
            ll b = (n - r) / q;
            if (r < b){
                ans = min(ans, b);
            }
        }
    }
    if (ans == LLONG_MAX) cout << -1 << endl;
    else cout << ans << endl;


    return 0;
}

Submission Info

Submission Time
Task D - Digit Sum
User I3MNIX
Language C++14 (GCC 5.4.1)
Score 0
Code Size 1141 Byte
Status WA
Exec Time 28 ms
Memory 256 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 0 / 500
Status
AC × 5
AC × 46
WA × 1
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 AC 4 ms 256 KB
subtask1_100000000000_2.txt AC 22 ms 256 KB
subtask1_100000000000_3.txt AC 22 ms 256 KB
subtask1_100000000000_50000000000.txt AC 27 ms 256 KB
subtask1_100000000000_50000000001.txt AC 27 ms 256 KB
subtask1_100000000000_99999999999.txt AC 27 ms 256 KB
subtask1_16983563041_1.txt AC 4 ms 256 KB
subtask1_1_1.txt AC 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 AC 4 ms 256 KB
subtask1_31415926535_1.txt AC 14 ms 256 KB
subtask1_49234683534_2461734011.txt AC 21 ms 256 KB
subtask1_4_1.txt AC 4 ms 256 KB
subtask1_58640129658_232122496.txt AC 22 ms 256 KB
subtask1_68719476735_35.txt AC 11 ms 256 KB
subtask1_68719476735_36.txt AC 4 ms 256 KB
subtask1_68719476735_37.txt AC 19 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 24 ms 256 KB
subtask1_79285169301_27.txt AC 4 ms 256 KB
subtask1_82914867733_1676425945.txt AC 25 ms 256 KB
subtask1_8594813796_75700.txt AC 7 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 27 ms 256 KB
subtask1_98750604051_977728851.txt AC 27 ms 256 KB
subtask1_99999515529_1.txt AC 22 ms 256 KB
subtask1_99999515529_316226.txt AC 27 ms 256 KB
subtask1_99999515529_316227.txt WA 27 ms 256 KB
subtask1_99999515529_316228.txt AC 27 ms 256 KB
subtask1_99999515529_49999757765.txt AC 27 ms 256 KB
subtask1_99999515529_49999757766.txt AC 27 ms 256 KB
subtask1_99999515530_2.txt AC 22 ms 256 KB
subtask1_99999999977_1.txt AC 22 ms 256 KB
subtask1_99999999977_2.txt AC 22 ms 256 KB
subtask1_99999999977_49999999989.txt AC 28 ms 256 KB
subtask1_99999999977_49999999990.txt AC 27 ms 256 KB
subtask1_99999999999_1.txt AC 22 ms 256 KB
subtask1_99999999999_100000000000.txt AC 28 ms 256 KB