Submission #655461

#	Time	Username	Problem	Language	Result	Execution time	Memory
655461		benjaminkleyn	Gap (APIO16_gap)	C++17	30 / 100	3084 ms	1864 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
using namespace std;
typedef long long ll;

ll a[100000];

ll findGap(int T, int N)
{
    if (T == 1)
    {
        ll lo = 0, hi = 1000000000000000000;
        int l = 0, r = N - 1;
        while (l <= r)
        {
            MinMax(lo, hi, &a[l], &a[r]);
            lo = a[l++] + 1;
            hi = a[r--] - 1;
        }
        ll mx = 0;
        for (int i = 0; i < N; i++)
            mx = max(mx, a[i+1] - a[i]);
        return mx;
    }
    else
    {
        ll lo = 0, hi = 1000000000000000000, prev;
        MinMax(lo, hi, &lo, &hi);
        ll ans = (hi - lo) / (N - 1);
        while (lo <= hi)
        {
            ll x = -1, y;
            ll i = lo, step = ans;

            while (x == -1)
            {
                MinMax(i + 1, i + step, &x, &y);
                i += step;
            }
            ans = max(ans, x - lo);
            lo = y;
        }
        return ans;
    }
}

Compilation message (stderr)

gap.cpp: In function 'll findGap(int, int)':
gap.cpp:27:46: warning: unused variable 'prev' [-Wunused-variable]
   27 |         ll lo = 0, hi = 1000000000000000000, prev;
      |                                              ^~~~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 70