Submission #183981

#	Time	Username	Problem	Language	Result	Execution time	Memory
183981		dndhk	Gap (APIO16_gap)	C++14	70 / 100	81 ms	3304 KiB

gap

#include "gap.h"
#include <bits/stdc++.h>

#define all(v) (v).begin(), (v).end()
#define sortv(v) sort(all(v))
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define pb push_back
#define FI first
#define SE second
#define lb lower_bound
#define ub upper_bound
#define mp make_pair
#define test 1
#define TEST if(test)

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;

const int MOD = 1000000007; // 998244353
const int INF = 2e9;
const ll INFLL = 1e18;
const int MAX_N = 1;


pll query(ll x, ll y){
	pll p;
	//cout<<x<<" "<<y<<endl;
	MinMax(x, y, &p.first, &p.second);
	return p;
}

vector<pll> vt;

vector<ll> v;

long long findGap(int T, int N){
	if(T==1){
		ll s = 0, e = 1e18;
		while(s<e){
			pll p = query(s, e);
			if(p.first==-1)	break;
			v.pb(p.first);
			if(p.first==p.second)	break;
			v.pb(p.second);
			s = p.first+1; e = p.second-1;
		}
		sort(v.begin(), v.end());
		ll a = 0;
		for(int i=0; i<v.size()-1; i++){
			a = max(a, v[i+1]-v[i]);
		}
		return a;
	}
	pll p1 = query(0, 1e18);
	if(N==2){
		return p1.second-p1.first;
	}
	ll s = p1.first, e = p1.second;
	if(e-s==2){
		return 1LL;
	}
	ll L = (e-s-2)/N;
	ll ans = L;
	vt.pb({s, s});
	ll n = s+1;
	for(int i=0; i<N; i++){
		if(n>=e)	break;
		pll p = query(n, min(n+L, e));
		if(p.first!=-1){
			vt.pb({p.first, p.second});
		}
		n+=L+1;
	}
	vt.pb({e, e});
	for(int i=0; i<vt.size()-1; i++){
		ans = max(ans, vt[i+1].first-vt[i].second);
	}
	return ans;
}

Compilation message (stderr)

gap.cpp: In function 'long long int findGap(int, int)':
gap.cpp:53:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0; i<v.size()-1; i++){
                ~^~~~~~~~~~~
gap.cpp:79:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0; i<vt.size()-1; i++){
               ~^~~~~~~~~~~~

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