Submission #563334

#	Time	Username	Problem	Language	Result	Execution time	Memory
563334		1ne	Rice Hub (IOI11_ricehub)	C++14	0 / 100	19 ms	3836 KiB

ricehub

#include <bits/stdc++.h>
using namespace std;
 
#define MOD 1000000007
#define mxn 100005
#define mxm 105
#define f first
#define s second
#define pb push_back
#define es " "
#define endl '\n'
#define INF 0x3f3f3f3f
#define INFL 0x3f3f3f3f3f3f3f3f
#define ll long long
#define fastio ios_base::sync_with_stdio(0), cin.tie(0)
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
typedef pair<string, string> pii;
typedef pair<int, pii> pip;
 
int resp;
ll prefix[mxn], v[mxn];
 
ll testa(int i, int j){
    int med=(i+j)/2;
    ll sum=((prefix[j]-prefix[med])-v[med]*(j-med))+((med-i)*v[med]-(prefix[med-1]-prefix[i-1]));
    return sum;
}
 
int besthub(int n, int l, int x[], ll b){
	vector<int64_t>pref(n + 1,0),dpref(n + 1,0);
  for (int i = 0 ;i<n - 1;++i){
	  pref[i + 1] = pref[i] + (x[i + 1] - x[i]);
	  dpref[i + 2] = pref[i + 1] + dpref[i + 1];
  }
  auto dist = [&](int l,int r){
	 return pref[r] * (r - l) - dpref[r] + dpref[l];
  };
  auto distt = [&](int l,int r){
		int mid = (l + r)>>1;
		return dist(l,mid) + dist(mid,r);
	};
    for(int i=1; i<=n; i++){
        v[i]=x[i-1];
        prefix[i]=prefix[i-1]+v[i];
    }
    for(int i=1; i<=n; i++){
        int ini=i, fim=n, meio;
        while(ini<=fim){
            meio=(ini+fim)/2;
            //cout<<i<< " "<<meio<<" "<<distt(i - 1,meio - 1)<<'\n';
            if(distt(i - 1, meio - 1)<=b){
                resp=max(resp, meio-i+1);
                ini=meio+1;
            }else{
                fim=meio-1;
            }
        }
    }
    return resp;
}

• Subtask 1: 0 / 17
• Subtask 2: 0 / 25
• Subtask 3: 0 / 26
• Subtask 4: 0 / 32