結果

問題 No.68 よくある棒を切る問題 (2)
ユーザー is_eri23is_eri23
提出日時 2014-11-18 20:19:23
言語 C++11
(gcc 11.4.0)
結果
TLE  
実行時間 -
コード長 3,968 bytes
コンパイル時間 2,049 ms
コンパイル使用メモリ 163,184 KB
実行使用メモリ 13,092 KB
最終ジャッジ日時 2024-06-10 20:06:20
合計ジャッジ時間 15,128 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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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 TLE -
testcase_01 -- -
testcase_02 -- -
testcase_03 -- -
testcase_04 -- -
testcase_05 -- -
testcase_06 -- -
testcase_07 -- -
testcase_08 -- -
testcase_09 -- -
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
#define EPS 1e-9
#define INF 1070000000LL
#define MOD 1000000007LL
#define fir first
#define foreach(it,X) for(auto it=(X).begin();it!=(X).end();it++)
#define numa(x,a) for(auto x: a)
#define ite iterator
#define mp make_pair
#define rep(i,n) rep2(i,0,n)
#define rep2(i,m,n) for(int i=m;i<(n);i++)
#define pb push_back
#define pf push_front
#define sec second
#define sz(x) ((int)(x).size())
#define ALL( c ) (c).begin(), (c).end()
#define gcd(a,b) __gcd(a,b)
#define mem(x,n) memset(x,n,sizeof(x))
#define endl "\n"
using namespace std;
template <int POS, class TUPLE> void deploy(std::ostream &os, const TUPLE &tuple){}
template <int POS, class TUPLE, class H, class ...Ts> void deploy(std::ostream &os, const TUPLE &t){ os << (POS == 0 ? "" : ", ") << get<POS>(t); deploy<POS + 1, TUPLE, Ts...>(os, t); }
template <class T,class U> std::ostream& operator<<(std::ostream &os, std::pair<T,U> &p){ os << "(" << p.first <<", " << p.second <<")";return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::vector<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T> std::ostream& operator<<(std::ostream &os, std::set<T> &v){ int remain = v.size(); os << "{"; for(auto e: v) os << e << (--remain == 0 ? "}" : ", "); return os; }
template <class T, class K> std::ostream& operator<<(std::ostream &os, std::map<T, K> &mp){ int remain = mp.size(); os << "{"; for(auto e: mp) os << "(" << e.first << " -> " << e.second << ")" << (--remain == 0 ? "}" : ", "); return os; }
#define DEBUG1(var0) { std::cerr << (#var0) << "=" << (var0) << endl; }
#define DEBUG2(var0, var1) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG1(var1); }
#define DEBUG3(var0, var1, var2) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG2(var1,var2); }
#define DEBUG4(var0, var1, var2, var3) { std::cerr << (#var0) << "=" << (var0) << ", ";DEBUG3(var1,var2,var3); }
using ll = long long;

int N;
ll nums[100100];
int Q;
pair <ll,int> K[100100];
double ans[100100];

void calc(double lp,double up,int now){

  while(up > lp + 1e-9 && up > lp*(1+1e-9)){
    double mid = (lp + up) / 2;
    double mid_time = 1 / mid;
    ll now_k = 0;
    rep(i,N){
      now_k += (ll) (nums[i] * mid_time);
    }
    if(now_k >= K[now].first){
      lp = mid;
    }else{
      up = mid;
    }
  }

  ans[K[now].second] = lp;
}

void go(double lp,double up,int start,int end){//[start,end)
  //DEBUG4(lp,up,start,end);
  if(end - start == 1){
    if(ans[K[start].second] != 0){
      return;
    }
    //calc(lp,up,start);
    if(abs(up-lp) < 1e-9){
      ans[K[start].second] = (lp + up)/2;
    }else{
      calc(lp,up,start);
    }
    return;
  }else if(end <= start){
    return;
  }
  if(abs(up - lp) < 1e-9){
    for(int i = start; i < end;i++){
      ans[K[i].second] = (lp + up) / 2;
    }
    return;
  }
  double mid = (lp + up) / 2;
  double mid_time = 1 / mid;
  ll now_k = 0;
  rep(i,N){
    now_k += (ll) (nums[i] * mid_time);
  }

  auto it = lower_bound(K+start,K+end,now_k,[](pair <ll,int> a,ll k){return a.first <= k;});
  //DEBUG4(lp,up,start,end);
  //DEBUG2(now_k,it-K);
  if(it == K+Q){
    go(mid,up,start,end);
  }else{
    for(int i = start;i < end;i++){
      if(ans[K[i].second] == 0){
        break;
      }
      start += 1;
    }
    for(int i = end-1; i >= start;i--){
      if(ans[K[i].second] == 0){
        break;
      }
      end -= 1;
    }
    go(mid,up,start,(it-K));    
    go(lp,mid,it-K,end);

  }
}

int main()
{
  cin.tie(0);
  ios_base::sync_with_stdio(0);
  int a,b;
  cin >> N;
  rep(i,N){
    cin >> nums[i];
  }
  cin >> Q;
  rep(i,Q){
    cin >> K[i].first;
    K[i].second = i;
  }
  sort(K,K+Q);
  go(0,1e9+10,0,Q);
  rep(i,Q){
    cout << fixed << setprecision(15) << ans[i] << endl;
  }
  return 0;
}
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