제출 #579911

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
579911		stevancv	Gap (APIO16_gap)	C++14	30 / 100	48 ms	1884 KiB

gap

#include <bits/stdc++.h>
#include "gap.h"
#define ll long long
#define ld long double
#define sp ' '
#define en '\n'
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
using namespace std;
const int N = 1e5 + 2;
ll findGap(int t, int n) {
    if (t == 1 || t == 2) {
        vector<ll> a(n);
        ll mn = 0; ll mx = 1e18;
        for (int i = 0; i < n; i++) {
            if (i > n - i - 1) break;
            MinMax(mn, mx, &a[i], &a[n - i - 1]);
            mn = a[i] + 1;
            mx = a[n - i - 1] - 1;
        }
        ll ans = 0;
        for (int i = 1; i < n; i++) smax(ans, a[i] - a[i - 1]);
        return ans;
    }
    ll mn = 0; ll mx = 1e18;
    MinMax(0, 1e18, &mn, &mx);
    ll gap = (mx - mn + n - 2) / (n - 1);
    while (mn <= mx) {
        ll p, q, r, s;
        p = q = r = s = 0;
        if (mn + gap + 1 > mx - gap - 1) break;
        MinMax(mn + gap + 1, mx - gap - 1, &p, &q);
        if (p != -1) {
            if (mn + 1 <= p - gap - 1) MinMax(mn + 1, p - gap - 1, &r, &s);
            if (r != -1) smax(gap, p - r);
            else smax(gap, p - mn);
          	s = -1;
            if (q + gap + 1 <= mx - 1) MinMax(q + gap + 1, mx - 1, &r, &s);
            if (s != -1) smax(gap, s - q);
            else smax(gap, mx - q);
            mn = p;
            mx = q;
        }
        else {
            MinMax(mn + 1, mn + gap, &p, &q);
            MinMax(mx - gap, mx - 1, &r, &s);
            if (q != -1) smax(mn, q);
            if (r != -1) smin(mx, r);
            smax(gap, mx - mn);
            break;
        }
    }
    return gap;
}

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