Submission #753285

#	Time	Username	Problem	Language	Result	Execution time	Memory
753285		acceptify	Rice Hub (IOI11_ricehub)	C++17	68 / 100	15 ms	1472 KiB

ricehub

#include "ricehub.h"
#include <bits/stdc++.h>
using namespace std;

int besthub(int R, int L, int X[], long long B){
    long long ps[R];
    for (int i = 0; i < R; i++) ps[i] = X[i] + (i ? ps[i - 1] : 0);
    auto calc = [&] (int l, int r, int p) -> long long {
        long long sum = 0;
        sum += X[p] * (p - l + 1) - ps[p] + (l ? ps[l - 1] : 0);
        sum += ps[r] - ps[p] - X[p] * (r - p);
        return sum;
    };
    int l = 0, r = R, res = 0;
    while (l <= r) {
        int mid = (l + r) / 2;
        long long cost = 1e18;
        for (int i = 0; i + mid - 1 < R; i++) {
            int p = (i + i + mid - 1) / 2;
            cost = min(cost, calc(i, i + mid - 1, p));
            if ((i + i + mid - 1) % 2) cost = min(cost, calc(i, i + mid - 1, p + 1));
        }
        if (cost <= B) l = mid + 1, res = mid;
        else r = mid - 1;
    }
    return res;
}

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