Submission #809098

#	Time	Username	Problem	Language	Result	Execution time	Memory
809098		annabeth9680	Rice Hub (IOI11_ricehub)	C++17	100 / 100	13 ms	2516 KiB

ricehub

#include <bits/stdc++.h>
#define ll long long
using namespace std;
vector<ll> arr;
bool check(int val, int n, ll B){
    for(int i = 1;i<=n-val+1;++i){
        int r = i+val-1;
        int m = (i+r)/2;
        ll geld;
        if(val%2 == 0){
            geld = (arr[r]-arr[m])-(arr[m]-arr[i-1]);
        }
        else{
            geld = (arr[r]-arr[m])-(arr[m-1]-arr[i-1]);
        }
        if(geld <= B){
            //cout << val << " " << geld << " " << i << "\n";
            return true;
        }
    }
    return false;
}
int besthub(int R, int L, int X[], ll B){
    arr.resize(R+1); arr[0] = 0;
    for(int i = 1;i<=R;++i){
        arr[i] = arr[i-1]+X[i-1];
    }
    int l = 0, r = R;
    while(l < r){
        //cout << l << " " << r << "\n";
        int mid = (l+r+1)/2;
        if(check(mid,R,B)){
            l = mid;
        }
        else{
            r = mid-1;
        }
    }
    return l;
}

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