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제출 #304295

#제출 시각아이디문제언어결과실행 시간메모리
304295shenxy비스킷 담기 (IOI20_biscuits)C++17
100 / 100
18 ms896 KiB
#include "biscuits.h" #include <algorithm> #include <vector> using namespace std; long long count_tastiness(long long x, vector<long long> a) { while (a.size() < 60) a.push_back(0); vector<long long> b; for (long long i: a) b.push_back(i); for (int i = 1; i < 60; ++i) b[i] += b[i - 1] / 2; long long dp[61]; dp[0] = 1; for (int i = 0; i < 60; ++i) { if (b[i] < x) { dp[i + 1] = dp[i]; continue; } long long dpv = 0, k = max(0LL, x - a[i]) * 2; for (int j = i; j > 0; --j) { if (b[j - 1] >= k + x) dpv += dp[j - 1], k = max(0LL, k + x - a[j - 1]) * 2; else k = max(0LL, k - a[j - 1]) * 2; } if (k == 0) ++dpv; dp[i + 1] = dp[i] + dpv; } return dp[60]; }
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