Submission #956281

#	Time	Username	Problem	Language	Result	Execution time	Memory
956281		Nelt	Gap (APIO16_gap)	C++17	37.92 / 100	547 ms	3804 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;

ll findGap(int t, int n)
{
    if (t == 1)
    {
        ll ans = 0;
        ll a[n];
        ll l = 0, r = 1e18, i = 0, j = n - 1;
        while (i <= j)
        {
            MinMax(l, r, &a[i], &a[j]);
            l = a[i++] + 1;
            r = a[j--] - 1;
        }
        for (ll i = 0; i + 1 < n; i++)
            ans = max(ans, a[i + 1] - a[i]);
        return ans;
    }
    ll mn, mx;
    MinMax(0, 1e18, &mn, &mx);
    ll l = (mx - mn + n - 1) / n, r = mx - mn;
    while (l <= r)
    {
        ll mid = (l + r) >> 1, cur = mn, x, y;
        bool ok = false;
        while (cur + mid <= mx)
        {
            MinMax(cur + 1, cur + mid - 1, &x, &y);
            if (x == -1)
            {
                ok = true;
                break;
            }
            cur = y;
        }
        if (ok)
            l = mid + 1;
        else
            r = mid - 1;
    }
    return --l;
}

• Subtask 1: 30 / 30
• Subtask 2: 7.9246944396 / 70