結果
問題 | No.1211 円環はお断り |
ユーザー | toma |
提出日時 | 2020-08-30 16:29:10 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 2,749 bytes |
コンパイル時間 | 2,200 ms |
コンパイル使用メモリ | 207,068 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-04-27 10:08:27 |
合計ジャッジ時間 | 11,958 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,940 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | RE | - |
testcase_07 | AC | 2 ms
6,944 KB |
testcase_08 | AC | 2 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,944 KB |
testcase_10 | AC | 2 ms
6,940 KB |
testcase_11 | AC | 2 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,944 KB |
testcase_13 | AC | 214 ms
6,940 KB |
testcase_14 | AC | 340 ms
6,944 KB |
testcase_15 | AC | 250 ms
6,940 KB |
testcase_16 | AC | 439 ms
6,940 KB |
testcase_17 | AC | 29 ms
6,944 KB |
testcase_18 | AC | 226 ms
6,940 KB |
testcase_19 | AC | 39 ms
6,940 KB |
testcase_20 | AC | 42 ms
6,944 KB |
testcase_21 | AC | 46 ms
6,940 KB |
testcase_22 | AC | 222 ms
6,940 KB |
testcase_23 | AC | 272 ms
6,940 KB |
testcase_24 | AC | 161 ms
6,940 KB |
testcase_25 | AC | 9 ms
6,940 KB |
testcase_26 | AC | 262 ms
6,944 KB |
testcase_27 | AC | 162 ms
6,940 KB |
testcase_28 | AC | 270 ms
6,940 KB |
testcase_29 | AC | 257 ms
6,944 KB |
testcase_30 | AC | 349 ms
6,944 KB |
testcase_31 | AC | 132 ms
6,940 KB |
testcase_32 | AC | 405 ms
6,940 KB |
testcase_33 | AC | 479 ms
6,940 KB |
testcase_34 | AC | 475 ms
6,944 KB |
testcase_35 | AC | 475 ms
6,944 KB |
testcase_36 | AC | 475 ms
6,940 KB |
testcase_37 | AC | 461 ms
6,940 KB |
testcase_38 | AC | 490 ms
6,940 KB |
testcase_39 | AC | 495 ms
6,944 KB |
testcase_40 | AC | 463 ms
6,940 KB |
testcase_41 | AC | 2 ms
6,940 KB |
testcase_42 | AC | 2 ms
6,944 KB |
ソースコード
#include"bits/stdc++.h" using namespace std; #define REP(k,m,n) for(int (k)=(m);(k)<(n);(k)++) #define rep(i,n) REP((i),0,(n)) using ll = long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using tp3 = tuple<int, int, int>; using Mat = vector<vector<ll>>; constexpr int INF = 1 << 28; constexpr ll INFL = 1ll << 60; constexpr int dh[4] = { 0,1,0,-1 }; constexpr int dw[4] = { -1,0,1,0 }; bool isin(const int H, const int W, const int h, const int w) { return 0 <= h && h < H && 0 <= w && w < W; } // ============ template finished ============ ll all(const vector<ll>& A) { return accumulate(A.begin(), A.end(), 0ll); } vector<ll> make_acc(vector<ll> A) { const int N = A.size(); rep(i, N - 1) { A[i + 1] += A[i]; } return A; } ll get(const vector<ll>& acc, ll idx) { return idx == -1 ? 0 : acc[idx]; } void update(ll& bestIdx, ll& bestSpan, const ll idx, const ll span) { if (span < bestSpan) { bestIdx = idx; bestSpan = span; } } ll dist(ll from, ll to) { assert(from <= to); from--; return to - from; } ll need_span(const vector<ll>& acc, const ll idx, const ll val) { const ll N = acc.size(); auto itr = lower_bound(acc.begin(), acc.end(), val); if (itr != acc.end()) { return dist(idx, itr - acc.begin()); } else { ll need = val - acc.back(); itr = lower_bound(acc.begin(), acc.end(), need); return dist(idx, N - 1) + dist(0, itr - acc.begin()); } } pll shortest_span(const vector<ll>& acc, const ll M) { const ll N = acc.size(); ll bestIdx = -1, bestSpan = INF; rep(left, N) { const ll span = need_span(acc, left, get(acc, left - 1) + M); update(bestIdx, bestSpan, left, span); } return make_pair(bestIdx, bestSpan); } bool canCycle(const vector<ll>& acc, ll idx, const ll K, const ll M) { const ll N = acc.size(); ll step = 0; rep(_, K) { ll span = need_span(acc, idx, get(acc, idx - 1) + M); step += span; (idx += span) %= N; } return step <= N; } bool judge(const vector<ll>& A, const ll K, const ll M) { const ll N = A.size(); auto acc = make_acc(A); const auto[startIdx, span] = shortest_span(acc, M); assert(span < N / K + 1); for (int i = 0, idx = startIdx; i < span; i++, (++idx) %= N) { if (canCycle(acc, idx, K, M)) { return true; } } return false; } int main() { ll N, K; cin >> N >> K; vector<ll> A(N); rep(i, N)cin >> A[i]; ll safe = 0, out = all(A) / K + 1; while (abs(safe - out) > 1) { ll mid = (safe + out) / 2; (judge(A, K, mid) ? safe : out) = mid; } cout << safe << endl; return 0; }