Submission #673472

#	Time	Username	Problem	Language	Result	Execution time	Memory
673472		S2speed	Gap (APIO16_gap)	C++17	30 / 100	52 ms	1864 KiB

gap

#include<bits/stdc++.h>
#include "gap.h"

using namespace std;

#pragma GCC optimize ("Ofast")

#define all(x) x.begin() , x.end()
#define sze(x) (ll)(x.size())
typedef long long ll;

const ll maxn = 1e5 + 17 , md = 1e9 + 7;

ll a[maxn] , mn , mx;

ll findGap(int T , int n){
	if(T == 1 || n <= 8){
		ll x = 0 , y = n , pn = 0 , px = 1e18;
		while(x < y){
			MinMax(pn , px , &mn , &mx);
			a[x++] = mn; a[--y] = mx;
			pn = mn + 1; px = mx - 1;
		}
		ll ans = 0;
		for(ll i = 0 ; i < n - 1 ; i++){
			ans = max(ans , a[i + 1] - a[i]);
		}
		return ans;
	}
	MinMax(0 , (ll)1e18 , &mn , &mx);
	ll ls = mx;
	ll cur = (mx - mn + n - 2) / (n - 1) , x = mn;
	while(ls - x > cur){
		ll l = x + 1 , r = l + cur;
		MinMax(l , r , &mn , &mx);
		if(mn != -1){
			x = mx;
			continue;
		}
		while(true){
			r = l + (cur << 1);
			MinMax(l , r , &mn , &mx);
			if(mn == -1){
				cur <<= 1;
			} else {
				cur = mn - x;
				x = mx;
				break;
			}
		}
	}
	return cur;
}

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