Submission #677573

#	Time	Username	Problem	Language	Result	Execution time	Memory
677573		ThegeekKnight16	Rice Hub (IOI11_ricehub)	C++17	17 / 100	14 ms	704 KiB

ricehub

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

int findResp(int& R, int& L, int X[], long long& B, int i)
{
    int p = i; int q = i+1;
    long long sum = 0; int respi = 0;
    while (p >= 0 && q < R)
    {
        long long desq = abs(X[i] - X[p]); long long ddir = abs(X[q] - X[i]);
        if (desq < ddir)
        {
            if (sum + desq > B) break;
            sum += desq;
            p--;
            respi++;
        }
        else
        {
            if (sum + ddir > B) break;
            sum += ddir;
            q++;
            respi++;
        }
    }

    while (p >= 0)
    {
        long long desq = abs(X[i] - X[p]);
        if (sum + desq > B) break;
        sum += desq;
        p--;
        respi++;
    }

    while (q < R)
    {
        long long ddir = abs(X[q] - X[i]);
        if (sum + ddir > B) break;
        sum += ddir;
        q++;
        respi++;
    }
    // cerr << i << " " << sum << " " << respi << '\n';

    return respi;
}

int besthub(int R, int L, int X[], long long B)
{
    int resp = 0;

    int p = 0; int q = 0; long long sum = 0;
    for (int i = 0; i < R; i++)
    {
        // cerr << p << " " << q << " " << sum << '\n';
        while (sum > B)
        {
            if (q < p) q = p;
            long long desq = abs(X[i] - X[p]); long long ddir = abs(X[q] - X[i]);
            if (desq >= ddir) {sum -= desq; p++;}
            else {sum -= ddir; q--;}
        }

        while (p >= 0 && q < R)
        {
            long long desq = (p > 0) ? abs(X[i] - X[p-1]) : (long long)(1e18 + 10);
            long long ddir = (q < R-1) ? abs(X[q+1] - X[i]) : (long long)(1e18 + 10);
            if (desq < ddir)
            {
                if (sum + desq > B) break;
                sum += desq;
                p--;
            }
            else
            {
                if (sum + ddir > B) break;
                sum += ddir;
                q++;
            }
        }

        while (p >= 0)
        {
            long long desq = (p > 0) ? abs(X[i] - X[p-1]) : (long long)(1e18 + 10);

            if (sum + desq > B) break;
            sum += desq;
            p--;
        }

        while (q < R)
        {
            long long ddir = (q < R-1) ? abs(X[q+1] - X[i]) : (long long)(1e18 + 10);
            if (sum + ddir > B) break;
            sum += ddir;
            q++;
        }

        resp = max(resp, (q - p + 1));
        if (p <= i && i+1 < R) sum += (long long)((min(i, q) - p + 1) * (abs(X[i+1] - X[i])));
        if (q > i && i+1 < R) sum -= (long long)((q - max(i, p-1)) * (abs(X[i+1] - X[i])));
    }

    return resp;
}

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