Submission #277759

#	Time	Username	Problem	Language	Result	Execution time	Memory
277759		Dremix10	Rice Hub (IOI11_ricehub)	C++17	100 / 100	33 ms	2176 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int,int> pi;
typedef pair<ll,ll> pl;
#define F first
#define S second
#define endl '\n'
#define all(x) (x).begin(),(x).end()
#ifdef dremix
    #define p(x) cerr<<#x<<" = "<<x<<endl;
    #define p2(x,y) cerr<<#x<<" , "<<#y<<" = "<<x<<" , "<<y<<endl;
    #define pp(x) cerr<<#x<<" = ("<<x.F<<" , "<<x.S<<")"<<endl;
    #define pv(x) cerr<<#x<<" = {";for(auto u : x)cerr<<u<<", ";cerr<<"}"<<endl;
    #define ppv(x) cerr<<#x<<" = {";for(auto u : x)cerr<<u.F<<"-"<<u.S<<", ";cerr<<"}"<<endl;
#else
    #define p(x)
    #define p2(x,y)
    #define pp(x)
    #define pv(x)
    #define ppv(x)
#endif
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
const int maxp = 22;
const ld EPS = 1e-18;
const ll INF = 1e18;
const int MOD = 1e9+7;
const int N = 2e5+1;

int n,arr[N];
ll m;

bool chk(int x){
    int i;
    int idx = x/2;
    ll pos = arr[idx++];
    ll curr = 0;
    for(i=0;i<x;i++)
        curr += abs(arr[i]-pos);
    if(curr<=m)return 1;
    for(i=x;i<n;i++){
        curr -= abs(arr[i-x]-pos);
        curr += abs(arr[i]-pos);
        ll left = x/2;
        ll right = (x+1)/2;
        ll nxt = arr[idx++];
        ll diff = nxt-pos;
        curr += diff*left;
        curr -= diff*right;
        pos = nxt;
        if(curr<=m)return 1;
    }
    return 0;
}

int besthub(int R, int L, int X[], long long B){
    n = R;
    m = B;
    int i;
    for(i=0;i<n;i++)arr[i] = X[i];

    int l=1,r=n;
    int ans = 0;
    while(l<=r){
        int mid = (l+r)/2;
        bool ok = chk(mid);
        if(ok){
            l = mid+1;
            ans = mid;
        }
        else
            r = mid-1;
    }
    return ans;
}

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