Submission #30807

#	Time	Username	Problem	Language	Result	Execution time	Memory
30807		kavun	Gap (APIO16_gap)	C++14	30 / 100	1679 ms	524288 KiB

gap

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

using namespace std;
typedef long long ll;
ll a[100010], mx;
vector <ll> s;
int n, val, cnt = 2;

void search(int lo, int hi)
{
  int m = (lo+hi)/2;
  if(cnt == n || lo > hi)
    return;
  ll one,two;
  MinMax(lo,hi,&one,&two);
  if(one != -1)
    s.push_back(one),cnt++;
  if(two != -1 && two != one)
    s.push_back(two),cnt++;
  search(one+1,m);
  search(m+1,two-1);
}

long long findGap(int T, int N)
{
  n = N;
  val = n % 2 ? n/2+1 : n/2;
  if(T == 1)
    {
      MinMax(0,1e18,a,a + n-1);
      for(int i = 1; i < val; i++)
	MinMax(a[i-1]+1,a[n-i]-1,a + i,a + n-1-i);
      for(int i = 0; i < n-1; i++)
	mx = max(mx,a[i+1]-a[i]);
    }
  else if(T == 2)
    {
      ll fir,sec;
      MinMax(0,1e18,&fir,&sec);
      s.push_back(fir),s.push_back(sec);
      search(fir+1,sec-1);
      sort(s.begin(),s.end());
      for(int i = 0; i < n-1; i++)
	mx = max(mx,s[i+1]-s[i]);
    }
  return mx;
}

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