Submission #744356

#	Time	Username	Problem	Language	Result	Execution time	Memory
744356		vjudge1	쌀 창고 (IOI11_ricehub)	C++17	100 / 100	17 ms	2516 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;
const int maxR = 1e5 + 5;
#define ll long long
ll dp[maxR];

bool check(int window, int R, long long B)
{
    for (int m = (window + 1) / 2; m + (window / 2) <= R; ++m)
    {
        ll rightdis = dp[m + (window / 2)] - dp[m];
        ll leftdis = dp[m - 1 + (window % 2 == 0)] - dp[m - (window / 2) + (window % 2 == 0) - 1];
        ll cost = rightdis - leftdis;
        if (cost <= B)
            return true;
    }
    return false;
}

int besthub(int R, int L, int X[], long long B)
{
    dp[0] = 0;
    for (int i = 0; i < R; ++i)
        dp[i + 1] = dp[i] + X[i];
    int l = 0, r = R + 10, ans = -1;
    while (l <= r)
    {
        int mid = (l + r) / 2;
        //cout << l << " " << mid << " " << r << "\n";
        if (check(mid, R, B))
        {
            l = mid + 1;
            ans = mid;
        }
        else
            r = mid - 1;
    }
    //cout << ans;
    return ans;
}

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