Submission #272911

#	Time	Username	Problem	Language	Result	Execution time	Memory
272911		cheissmart	Gap (APIO16_gap)	C++14	38.53 / 100	134 ms	1988 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
#define F first
#define S second
#define PB push_back
#define EB emplace_back
#define MP make_pair
#define V vector
#define ALL(v) (v).begin(), (v).end()

using namespace std;

typedef long long ll;
typedef pair<int, int> pi;
typedef V<int> vi;

long long findGap(int T, int N)
{
	if(T == 1) {
		int l = 1, r = N;
		ll lb = 0, rb = 1e18;
		V<ll> v(N + 1);
		while(l <= r) {
			ll mn, mx;
			MinMax(lb, rb, &mn, &mx);
			v[l] = mn, v[r] = mx;
			l++, r--;
			lb = mn+1, rb = mx-1;
		}
		ll ans = 0;
		for(int i = 1; i < N; i++) ans = max(ans, v[i+1]-v[i]);
		return ans;
	} else {
		ll ans = 0;
		function<void(ll, ll)> go = [&](ll lb, ll rb) {
			if(lb == rb) return;
			ll mn1, mx1, mn2, mx2;
			ll mb = (lb + rb) / 2;
			MinMax(lb, mb, &mn1, &mx1);
			MinMax(mb+1, rb, &mn2, &mx2);
			if(mn2 != -1 && mx1 != -1)
				ans = max(ans, mn2 - mx1);
			if(mn1 != -1 && mn1 != mx1) go(lb, mb);
			if(mn2 != -1 && mn2 != mx2) go(mb+1, rb);
		};
		go(0, 1e18);
		return ans;
	}
}

• Subtask 1: 30 / 30
• Subtask 2: 8.5251072966 / 70