Submission #556848

#	Time	Username	Problem	Language	Result	Execution time	Memory
556848		loctildore	Global Warming (CEOI18_glo)	C++14	0 / 100	181 ms	14508 KiB

glo

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define f first
#define s second
//#define endl '\n'
#define all(x) begin(x), end(x)
#define bitm 262144
int n,x,maximum;
int val[200069];
int lis[200069];
int bit[262169];
vector<int> compress;
unordered_map<int,int> um;
void addl(int i, int y) {
  while (i<=bitm) {
    bit[i]=max(bit[i],y);
    i+=(i&-i);
  }
}
int findl(int i) {
  int rtn=0;
  while (i) {
    rtn=max(rtn,bit[i]);
    i-=(i&-i);
  }
  return rtn;
}
int main()
{
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  for (int i = 1; i < 200069; i++) {
    lis[i]=INT_MAX;
  }
  cin>>n>>x;
  for (int i = 0; i < n; i++) {
    cin>>val[i];
    compress.push_back(val[i]);
  }
  sort(all(compress));
  for (int i = 0; i < n; i++) {
    um[compress[i]]=i+1;
  }
  for (int i = 0; i < n; i++) {
    int tmp=lower_bound(lis,lis+200069,val[i]+x)-lis;
    tmp=max(tmp,findl(um[val[i]]-1)+1);
    addl(um[val[i]],tmp);
    maximum=max(maximum,tmp);

    tmp=upper_bound(lis,lis+200069,val[i])-lis;
    lis[tmp]=val[i];
    maximum=max(maximum,tmp);
  }
  cout<<maximum<<endl;
  return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25