제출 #921391

#제출 시각아이디문제언어결과실행 시간메모리
921391ksujay2비스킷 담기 (IOI20_biscuits)C++17
9 / 100
1068 ms600 KiB
#include <bits/stdc++.h>
using namespace std;
using ll = long long;

ll count_tastiness(ll x, vector<ll> a) {
    a.resize(20);
    function<ll(int, ll)> f = [&] (int i, ll y) {
        if(i < 0) return (ll)(y == 0);
        y -= a[i] * (1LL << i);
        return f(i - 1, max(0ll, y)) + ((x < (1LL << (60 - i))) ? f(i - 1, max(0ll, y + x * (1LL << i))) : 0);
    };
    return f(19, 0);
}
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