Submission #242184

#	Time	Username	Problem	Language	Result	Execution time	Memory
242184		jiahng	Gap (APIO16_gap)	C++14	83.51 / 100	106 ms	1980 KiB

gap

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

typedef long long ll;
typedef pair<ll,ll> pi;
typedef vector <ll> vi;
typedef vector <pi> vpi;
#define f first
#define s second
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define lbd(x, y) lower_bound(all(x), y)
#define ubd(x, y) upper_bound(all(x), y)
#define aFOR(i,x) for (auto i: x)
#define mem(x,i) memset(x,i,sizeof x)
#define fast ios_base::sync_with_stdio(false),cin.tie(0)
#define INF (ll)1e18
#define maxn 100001

ll arr[maxn];
long long findGap(int T, int N)
{
	if (T == 1){
		ll curs = 0, curt = 1e18;
		FOR(i,0,(N+1)/2 - 1){
			MinMax(curs,curt,arr + i, arr + N - i - 1);
			curs = arr[i] + 1;
			curt = arr[N - i - 1] - 1;
		}
		ll ans = 0;
		FOR(i,0,N-2) ans = max(ans,arr[i+1] - arr[i]);
		
		return ans;
	}else{
		ll mn=0,mx=0;
		MinMax(0LL,INF,&mn,&mx);
		
		ll lb = ceil(double(mx - mn + 1) / (double)N);

		ll cur = mn;
		ll ans = lb;
		
		ll prev = mn;
		while (cur <= mx){
			ll x,y;
			MinMax(cur,cur + lb - 1,&x,&y);
			if (x == -1){
				cur = min(mx,cur+lb);
				continue;
			}
			ans = max(ans,x - prev);
			prev = y;
			
			cur += lb;
		}
		ans = max(ans,mx - prev);
		return ans;
	}
}

• Subtask 1: 30 / 30
• Subtask 2: 53.5083487467 / 70