Submission #237569

#	Time	Username	Problem	Language	Result	Execution time	Memory
237569		Nucleist	Global Warming (CEOI18_glo)	C++14	100 / 100	833 ms	30048 KiB

glo

#include <bits/stdc++.h> 
using namespace std; 
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#define flash ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define debug(x) cerr << " - " << #x << ": " << x << endl;
#define debugs(x, y) cerr << " - " << #x << ": " << x << " " << #y << ": " << y << endl;
#define all(x) (x).begin(),(x).end()
#define sz(x) (ll)x.size()
#define ll long long
#define INF 1000000000
#define MOD 1000000007
#define pb push_back
#define ve vector<ll>
#define dos pair<ll,ll>
#define vedos vector<dos>
#define rand mt19937 rng(chrono::steady_clock::now().time_since_epoch().count())
#define EPS 0.000001
struct greateri
{
    template<class T>
    bool operator()(T const &a, T const &b) const { return a > b; }
};
void setIO(string s) {
  ios_base::sync_with_stdio(0); cin.tie(0); 
  freopen((s+".in").c_str(),"r",stdin);
  freopen((s+".out").c_str(),"w",stdout);
}
ll dp[200001],lis[200001],shift[200001],seg[800001],mak[200001],yo[200001];
ll n,x;
vedos hed;
ve mol;
set<dos>kol;
void up(ll p,ll l,ll r,ll index,ll val){
  if(l>index || r<index)return;
  if(l==r && l==index){
    seg[p]=val;
    return;
  }
  ll med=(l+r)/2;
  if(med>=index)up(p*2,l,med,index,val);
  else up(p*2+1,med+1,r,index,val);
  seg[p]=max(seg[p*2],seg[p*2+1]);
}
ll quer(ll p,ll l,ll r,ll l1,ll r1){
  if(l>r)return 0;
  if(l>r1 || l1>r)return 0;
  if(l>=l1 && r<=r1)return seg[p];
  ll med=(l+r)/2;
  return max(quer(p*2,l,med,l1,r1),quer(p*2+1,med+1,r,l1,r1));
}
int main()
{
  //flash;
  cin>>n>>x;
  for (ll i = 0; i < n; ++i)
  {
    ll yo;cin>>yo;
    hed.pb({yo,i}),mol.pb(yo),kol.insert({yo,i});
  }
  sort(all(hed));
  ll last=MOD;
  ll indexi=n;
  for (ll i = n-1; i >= 0 ; --i)
  {
    if(hed[i].first!=last){
      last=hed[i].first;
      indexi=i+1;
    }
    yo[hed[i].second]=indexi;
    mak[hed[i].second]=i;
  }
  for (ll i = n-1; i >= 0; --i)
  {
    ll ko=1;
    ll fo=quer(1,0,n-1,yo[i],n-1);
    ko=max(ko,fo+1);
    lis[i]=ko;
    up(1,0,n-1,mak[i],ko);
  }
  for (int i = 0; i < n; ++i)
  {
    up(1,0,n-1,i,0);
  }
  last=MOD;
  indexi=-1;
  for (ll i = 0; i < n; ++i)
  {
    if(hed[i].first!=last){
      last=hed[i].first;
      indexi=i-1;
    }
    yo[hed[i].second]=indexi;
  }
  for (int i = 0; i < n; ++i)
  {
    ll ko=1;
    ll fo=quer(1,0,n-1,0,yo[i]);
    ko=max(ko,fo+1);
    dp[i]=ko;
    up(1,0,n-1,mak[i],ko);
  }
  for (int i = 0; i < n; ++i)
  {
    up(1,0,n-1,i,0);
  }
  ll ans=0;
  for (int i = 0; i < n; ++i)
  {
    ll cur=mol[i]+x;
    auto u=kol.lower_bound({cur,-INF});
    if(u!=kol.begin()){
      u--;
      ll so=quer(1,0,n-1,0,mak[(*u).second]);
      ans=max(ans,so+lis[i]);
    }
    ll ko=1;
    ll fo=quer(1,0,n-1,0,yo[i]);
    ko=max(ko,fo+1);
    up(1,0,n-1,mak[i],ko);
    ans=max(ans,dp[i]+lis[i]-1);
  }
  cout<<ans;
  return 0;
}
//code the AC sol !
// BS/queue/map

Compilation message (stderr)

glo.cpp:4:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("O3")
 
glo.cpp:5:0: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
 #pragma GCC optimization ("unroll-loops")
 
glo.cpp: In function 'void setIO(std::__cxx11::string)':
glo.cpp:27:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen((s+".in").c_str(),"r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:28:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen((s+".out").c_str(),"w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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