Submission #667342

#	Time	Username	Problem	Language	Result	Execution time	Memory
667342		NothingXD	Gap (APIO16_gap)	C++14	30 / 100	54 ms	1864 KiB

gap

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

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
/*typedef __uint128_t L;
struct FastMod {
  ull b, m;
  FastMod(ull b) : b(b), m(ull((L(1) << 64) / b)) {}
  ull reduce(ull a) {
    ull q = (ull)((L(m) * a) >> 64);
    ull r = a - q * b; // can be proven that 0 <= r < 2*b
    return r >= b ? r - b : r;
  }
};
FastMod FM(2);*/
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

void debug_out() { cerr << endl; }

template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
	cerr << " " << H;
	debug_out(T...);
}

#define debug(...) cerr << "(" << #__VA_ARGS__ << "):", debug_out(__VA_ARGS__)
#define all(x) x.begin(), x.end()
#define MP(x, y) make_pair(x, y)
#define F first
#define S second

//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int maxn = 1e5 + 10;

ll a[maxn];

ll solve(int n){
	ll L = 0, R = 1e18;
	for (int i = 1; 2 * i <= n+1; i++){
		MinMax(L, R, &a[i], &a[n-i+1]);
		L = a[i] + 1;
		R = a[n-i+1] - 1;
	}
	ll ans = a[2] - a[1];
	for (int i = 2; i <= n; i++){
		ans = max(ans, a[i] - a[i-1]);
	}
	return ans;
}

long long findGap(int T, int N)
{

	if (T == 1){
		return solve(N);
	}

	ll L, R; MinMax(0, 1e18, &L, &R);


	ll ans = (R - L) / (N-1);
	ll k = ans;
	ll ptr = L + 1;
	ll lst = L;

	for (int i = 1; i < N; i++){
		ll mn, mx; MinMax(ptr, ptr + k - 1, &mn, &mx);
		if (mn != -1){
			ans = max(ans, mn - lst);
			lst = mx;
		}
		ptr += k;
	}

	return ans;

	return 0;
}

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