CODE FESTIVAL 2016 Final

Submission #1732675

Source codeソースコード

#include<bits/stdc++.h>

using namespace std;

template< class T >
struct ConvexHullTrickAddQueryMonotone
{
  deque< pair< T, T > > L;
  int isdec;

  ConvexHullTrickAddQueryMonotone() : isdec(-1) {}

  inline T getX(const pair< T, T > &a, const T &x)
  {
    return (a.first * x + a.second);
  }

  inline bool check(const pair< T, T > &a, const pair< T, T > &b, const pair< T, T > &c)
  {
    return ((b.first - a.first) * (c.second - b.second) >= (b.second - a.second) * (c.first - b.first));
  }

  inline bool empty() { return (L.empty()); }

  void add(T a, T b)
  {
    pair< T, T > line(a, b);

    if(!L.empty() && L.back().first == a) {
      line.second = min(line.second, L.back().second);
      L.pop_back();
    }
    while(L.size() >= 2 && check(L[L.size() - 2], L.back(), line)) L.pop_back();
    L.emplace_back(line);

  }

  T getMinimumQuery(T x)
  {
    int low = -1, high = (int) L.size() - 1;
    while(high - low > 1) {
      int mid = (low + high) >> 1;
      if((getX(L[mid], x) >= getX(L[mid + 1], x))) low = mid;
      else high = mid;
    }
    return (getX(L[high], x));
  }

  T getMinimumQueryMonotone(T x)
  {
    while(L.size() >= 2 && getX(L[0], x) >= getX(L[1], x)) {
      L.pop_front();
    }
    return (getX(L[0], x));
  }

};

using int64 = long long;

int main()
{
  int64 N, A;
  cin >> N >> A;

  if(N == 1) {
    cout << 1 << endl;
  } else if(N <= A) {
    cout << N << endl;
  } else {
    ConvexHullTrickAddQueryMonotone< int64 > cht;
    cht.add(-1, 0);
    for(int64 j = A;; j++) {
      if(-cht.getMinimumQuery(j) >= N) {
        cout << j << endl;
        return (0);
      }
      auto val = -cht.getMinimumQueryMonotone(j - A);
      cht.add(-val, val * j);
    }
  }
}

Submission

Task問題 E - Cookies
User nameユーザ名 ei13333
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 WA
Score得点 500
Source lengthソースコード長 1803 Byte
File nameファイル名
Exec time実行時間 ms
Memory usageメモリ使用量 -

Test case

Set

Set name Score得点 / Max score Cases
sample - sample-01.txt,sample-02.txt,sample-03.txt
dataset1 500 / 500 sample-01.txt,01-01.txt,01-02.txt,01-03.txt,01-04.txt,01-05.txt,01-06.txt,01-07.txt,01-08.txt,01-09.txt,01-10.txt,01-11.txt,01-12.txt,01-13.txt,01-14.txt,01-15.txt,01-16.txt,01-17.txt,01-18.txt,01-19.txt,01-20.txt,01-21.txt,01-22.txt,01-23.txt,01-24.txt,01-25.txt,01-26.txt
dataset2 0 / 500 sample-01.txt,sample-02.txt,sample-03.txt,01-01.txt,01-02.txt,01-03.txt,01-04.txt,01-05.txt,01-06.txt,01-07.txt,01-08.txt,01-09.txt,01-10.txt,01-11.txt,01-12.txt,01-13.txt,01-14.txt,01-15.txt,01-16.txt,01-17.txt,01-18.txt,01-19.txt,01-20.txt,01-21.txt,01-22.txt,01-23.txt,01-24.txt,01-25.txt,01-26.txt,02-01.txt,02-02.txt,02-03.txt,02-04.txt,02-05.txt,02-06.txt,02-07.txt,02-08.txt,02-09.txt,02-10.txt,02-11.txt,02-12.txt,02-13.txt,02-14.txt,02-15.txt,02-16.txt,02-17.txt,02-18.txt,02-19.txt,02-20.txt,02-21.txt,02-22.txt,02-23.txt,02-24.txt,02-25.txt,02-26.txt,02-27.txt,02-28.txt,02-29.txt,02-30.txt,02-31.txt,02-32.txt,02-33.txt,02-34.txt,02-35.txt,02-36.txt,02-37.txt,02-38.txt,02-39.txt,02-40.txt,sample-01.txt,sample-02.txt,sample-03.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
01-01.txt AC 1 ms 256 KB
01-02.txt AC 1 ms 256 KB
01-03.txt AC 1 ms 256 KB
01-04.txt AC 1 ms 256 KB
01-05.txt AC 1 ms 256 KB
01-06.txt AC 1 ms 256 KB
01-07.txt AC 1 ms 256 KB
01-08.txt AC 1 ms 256 KB
01-09.txt AC 1 ms 256 KB
01-10.txt AC 1 ms 256 KB
01-11.txt AC 2 ms 256 KB
01-12.txt AC 1 ms 256 KB
01-13.txt AC 1 ms 256 KB
01-14.txt AC 1 ms 256 KB
01-15.txt AC 1 ms 256 KB
01-16.txt AC 1 ms 256 KB
01-17.txt AC 1 ms 256 KB
01-18.txt AC 1 ms 256 KB
01-19.txt AC 1 ms 256 KB
01-20.txt AC 1 ms 256 KB
01-21.txt AC 1 ms 256 KB
01-22.txt AC 1 ms 256 KB
01-23.txt AC 1 ms 256 KB
01-24.txt AC 1 ms 256 KB
01-25.txt AC 1 ms 256 KB
01-26.txt AC 1 ms 256 KB
02-01.txt AC 1 ms 256 KB
02-02.txt WA
02-03.txt WA
02-04.txt WA
02-05.txt WA
02-06.txt WA
02-07.txt WA
02-08.txt WA
02-09.txt WA
02-10.txt WA
02-11.txt WA
02-12.txt WA
02-13.txt AC 1 ms 256 KB
02-14.txt WA
02-15.txt WA
02-16.txt AC 1 ms 256 KB
02-17.txt AC 1 ms 256 KB
02-18.txt WA
02-19.txt AC 2 ms 256 KB
02-20.txt AC 3 ms 256 KB
02-21.txt WA
02-22.txt AC 485 ms 32516 KB
02-23.txt AC 210 ms 16564 KB
02-24.txt AC 213 ms 16564 KB
02-25.txt AC 1 ms 256 KB
02-26.txt AC 1 ms 256 KB
02-27.txt WA
02-28.txt WA
02-29.txt AC 1 ms 256 KB
02-30.txt WA
02-31.txt WA
02-32.txt WA
02-33.txt WA
02-34.txt WA
02-35.txt AC 1 ms 256 KB
02-36.txt WA
02-37.txt WA
02-38.txt AC 3 ms 384 KB
02-39.txt AC 200 ms 14096 KB
02-40.txt AC 476 ms 32772 KB
sample-01.txt AC 1 ms 256 KB
sample-02.txt AC 1 ms 256 KB
sample-03.txt AC 1 ms 256 KB