Submission #519066

#	Time	Username	Problem	Language	Result	Execution time	Memory
519066		A_D	Global Warming (CEOI18_glo)	C++14	0 / 100	402 ms	30868 KiB

glo

#include <bits/stdc++.h>

#define int long long
#define ii pair<int,int>
#define F first
#define S second

using namespace std;
const int N=2e5+100;
int a[N];
map<int,int> mp;
set<int> st;
int seg1[4*N];
int seg2[4*N];
int b[N];
int freq[N];
int get1(int p,int s,int e,int a,int b)
{
    if(a<=s&&e<=b)return seg1[p];
    if(s>b||e<a)return 0;
    int mid=(s+e)/2;
    return max(get1(p*2,s,mid,a,b),get1(p*2+1,mid+1,e,a,b));
}
void update1(int p,int s,int e,int i,int v)
{
    if(s==e){
        seg1[p]=v;
        return;
    }
    int mid=(s+e)/2;
    if(i<=mid){
        update1(p*2,s,mid,i,v);
    }
    else{
        update1(p*2+1,mid+1,e,i,v);
    }
    seg1[p]=max(seg1[p*2],seg1[p*2+1]);
}

int get2(int p,int s,int e,int a,int b)
{
    if(a<=s&&e<=b)return seg2[p];
    if(s>b||e<a)return 0;
    int mid=(s+e)/2;
    return max(get2(p*2,s,mid,a,b),get2(p*2+1,mid+1,e,a,b));
}



void update2(int p,int s,int e,int i,int v)
{
    if(s==e){
        seg2[p]=v;
        return;
    }
    int mid=(s+e)/2;
    if(i<=mid){
        update2(p*2,s,mid,i,v);
    }
    else{
        update2(p*2+1,mid+1,e,i,v);
    }
    seg2[p]=max(seg2[p*2],seg2[p*2+1]);
}


void solve()
{
    int n,x;
    cin>>n>>x;
    for(int i=1;i<=n;i++){
        scanf("%lld",&a[i]);
        st.insert(a[i]);
    }
    int cnt=1;
    for(auto x:st){
        freq[cnt]=x;
        mp[x]=cnt++;
    }
    for(int i=1;i<=n;i++){
        a[i]=mp[a[i]];
    }
    for(int i=1;i<=n;i++){
        int v=0;
        if(a[i]!=1){
            v=get1(1,1,n,1,a[i]-1);
        }
        //cout<<v<<" ";
        b[i]=get1(1,1,n,a[i],a[i]);
        update1(1,1,n,a[i],v+1);
      //  cout<<b[i]<<" ";
    }
    //cout<<endl;
    int ans=get1(1,1,n,1,n);
    cout<<ans<<endl;
    return;
    /*
 //   cout<<seg1[1]<<endl;
    for(int i=n;i>1;i--){
        int v=0;
        if(a[i]!=n){
            v=get2(1,1,n,a[i]+1,n);
        }
        update2(1,1,n,a[i],v+1);
        //cout<<b[i]<<" ";
        update1(1,1,n,a[i],b[i]);
       // for(int j=1;j<=n;j++)cout<<get1(1,1,n,a[j],a[j])<<" ";cout<<endl;
        int l=1,r=cnt-1,ann;
        while(l<=r){
            int mid=(l+r)/2;
            if(freq[mid]<freq[a[i]]+x){
                l=mid+1;
                ann=mid;
            }
            else{
                r=mid-1;
            }
        }
  //      cout<<get1(1,1,n,1,ann)<<" "<<get2(1,1,n,a[i],n)<<endl;
        ans=max(ans,get2(1,1,n,a[i],n)+get1(1,1,n,1,ann));
    }
//    cout<<endl;
    cout<<ans<<endl;
    */
}
main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
}

Compilation message (stderr)

glo.cpp:126:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
  126 | main()
      | ^~~~
glo.cpp: In function 'void solve()':
glo.cpp:72:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   72 |         scanf("%lld",&a[i]);
      |         ~~~~~^~~~~~~~~~~~~~

• 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