Submission #710553

#	Time	Username	Problem	Language	Result	Execution time	Memory
710553		baojiaopisu	Gap (APIO16_gap)	C++14	100 / 100	81 ms	6944 KiB

gap

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

using ll = long long;
using ld = long double;
using ull = unsigned long long;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;

#define fi first
#define se second
#define left BAO
#define right ANH
#define pb push_back
#define pf push_front
#define mp make_pair
#define ins insert
#define btpc __builtin_popcount
#define btclz __builtin_clz

#define sz(x) (int)(x.size());
#define all(x) x.begin(), x.end()
#define debug(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        if (x > y)
        {
            x = y;
            return true;
        }
        return false;
    }
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        if (x < y)
        {
            x = y;
            return true;
        }
        return false;
    }

const int MOD = 1e9 + 7; //998244353

template<class X, class Y>
	void add(X &x, const Y &y) {
		x = (x + y);
		if(x >= MOD) x -= MOD;
	}

template<class X, class Y> 
	void sub(X &x, const Y &y) {
		x = (x - y);
		if(x < 0) x += MOD;
	}

/* Author : Le Ngoc Bao Anh, 12A5, LQD High School for Gifted Student*/

const ll INF = 1e18;
const int N = 1e5 + 10;

ll findGap(int t, int n) {
	if(t == 1) {
		ll a, b;
		set<ll> num;
		MinMax(0, INF, &a, &b);
		num.ins(a); num.ins(b);
		int cnt = 2;
		while(cnt < n) {
			ll s, t;
			MinMax(a + 1, b - 1, &s, &t);
			num.ins(s);
			num.ins(t);
			cnt += 2;
			a = s;
			b = t;
		}

		vector<ll> c;
		for(auto x : num) c.pb(x);
		ll ans = 0;
		for(int i = 0; i + 1 < c.size(); i++) {
			maximize(ans, c[i + 1] - c[i]);
		}

		return ans;
	}

	ll a, b;
	MinMax(0, INF, &a, &b);
	ll d = (b - a - 1) / (n - 1);
	ll c = (b - a - 1) % n;
	ll l = a + 1;
	ll ans = 0, last = a;
	for(int i = 1; i < n; i++) {
		ll r = l + d + (i <= c) - 1;
		ll s, t;
		MinMax(l, r, &s, &t);
		if(s == -1) {
			l = r + 1;
			continue;
		}
		maximize(ans, s - last);
		last = t;
		l = r + 1;
	}

	maximize(ans, b - last);
	return ans;
};

Compilation message (stderr)

gap.cpp: In function 'll findGap(int, int)':
gap.cpp:86:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   86 |   for(int i = 0; i + 1 < c.size(); i++) {
      |                  ~~~~~~^~~~~~~~~~

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