Submission #636282

#	Time	Username	Problem	Language	Result	Execution time	Memory
636282		ghostwriter	Gap (APIO16_gap)	C++14	100 / 100	55 ms	1864 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include <debug.h>
#include "grader.cpp"
#endif
#define st first
#define nd second
#define pb push_back
#define pf push_front
#define _pb pop_back
#define _pf pop_front
#define lb lower_bound
#define ub upper_bound
#define mtp make_tuple
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
typedef long long ll; typedef unsigned long long ull;
typedef double db; typedef long double ldb;
typedef pair<int, int> pi; typedef pair<ll, ll> pll;
typedef vector<int> vi; typedef vector<ll> vll; typedef vector<pi> vpi; typedef vector<pll> vpll;
typedef string str;
template<typename T> T gcd(T a, T b) { return (b == 0? a : gcd(b, a % b)); }
template<typename T> T lcm(T a, T b) { return a / gcd(a, b) * b; }
#define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
#define FOS(i, r, l) for (int (i) = (r); (i) >= (l); --(i))
#define EACH(i, x) for (auto &(i) : (x))
#define WHILE while
#define file "TEST"
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
ll rand(ll l, ll r) { return uniform_int_distribution<ll>(l, r)(rd); }
/*
    Tran The Bao
    CTL - Da Lat
    Cay ngay cay dem nhung deo duoc cong nhan
*/
const int NMAX = 1e5 + 1;
int n;
ll a[NMAX];
ll findGap(int T, int N) {
	::n = N;
	if (T == 1) {
		ll l = 0, r = 1e18;
		int pl = 1, pr = n;
		WHILE(pl <= pr) {
			MinMax(l, r, &l, &r);
			a[pl] = l;
			a[pr] = r;
			++l;
			--r;
			++pl;
			--pr;
		}
		ll rs = 0;
		FOR(i, 1, n - 1) rs = max(rs, a[i + 1] - a[i]);
		return rs;
	}
	ll l = 0, r = 1e18;
	MinMax(l, r, &l, &r);
	ll Min = (r - l + n - 2) / (n - 1);
	assert((r - l + 1) / (Min + 1) <= n);
	ll pre = -1;
	ll rs = Min;
	for (; l <= r;) {
		ll nl = l;
		ll nr = min(l + Min, r);
		MinMax(nl, nr, &nl, &nr);
		if (nl != -1 && pre != -1) rs = max(rs, nl - pre);
		if (nr != -1) pre = nr;
		l += Min + 1;
	}
	return rs;
}

Compilation message (stderr)

gap.cpp: In function 'll findGap(int, int)':
gap.cpp:26:31: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   26 | #define FOR(i, l, r) for (int (i) = (l); (i) <= (r); ++(i))
      |                               ^
gap.cpp:56:3: note: in expansion of macro 'FOR'
   56 |   FOR(i, 1, n - 1) rs = max(rs, a[i + 1] - a[i]);
      |   ^~~

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