제출 #921474

#제출 시각아이디문제언어결과실행 시간메모리
921474ksujay2비스킷 담기 (IOI20_biscuits)C++17
44 / 100
22 ms1368 KiB
#include <bits/stdc++.h> using namespace std; using ll = long long; const int MXK = 60; ll count_tastiness(ll x, vector<ll> a) { a.resize(MXK); vector<ll> f(MXK); f[0] = 1; for(int i = 0; i < MXK; i++) { ll sm = 0; ll prev = 0; ll mx = 0; for(int j = i; j >= 0; j--) { // f[j] to f[i] transition sm += a[j] * (1LL << j); mx ^= 1LL << (i - j); ll nw = min((sm / x) >> j, mx); f[i + 1] += f[j] * max(0ll, nw + 1 - prev); prev = 2 * max(prev, nw + 1); } } return f[59]; }
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