제출 #391205

#제출 시각아이디문제언어결과실행 시간메모리
391205AlexPop28비스킷 담기 (IOI20_biscuits)C++14
0 / 100
1085 ms20712 KiB
#include "biscuits.h" #include <bits/stdc++.h> using namespace std; int n; map<pair<int, long long>, long long> memo; long long Solve(int i, const vector<long long> &cnt, long long s) { if (memo.count({i, s})) return memo[{i, s}]; if (i == (int)cnt.size()) { // cerr << "br 1: " << s << '\n'; return 1LL; } long long ret; ret = Solve(i + 1, cnt, (s + cnt[i]) / 2); if (s + cnt[i] >= n) { ret += Solve(i + 1, cnt, (s + cnt[i] - n) / 2); } return memo[{i, s}] = ret; } long long count_tastiness(long long n, vector<long long> a) { ::n = n; long long s = 0; for (int i = 0; i < (int)a.size(); ++i) { if (a[i] > n + 1) { if (i + 1 == (int)a.size()) a.emplace_back(0LL); auto delta = (a[i] - n) / 2; a[i + 1] += delta; a[i] -= 2 * delta; } s += a[i] << i; // cerr << a[i] << ' '; } // cerr << endl; memo.clear(); return Solve(0, a, 0); }
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