Submission #879230

#	Time	Username	Problem	Language	Result	Execution time	Memory
879230		8pete8	Financial Report (JOI21_financial)	C++14	100 / 100	969 ms	37460 KiB

Main

#include<iostream>
#include<stack>
#include<map>
#include<vector>
#include<string>
#include<unordered_map>
#include <queue>
#include<cstring>
#include<limits.h>
#include<cmath>
#include<set>
#include<algorithm>
#include<bitset>
using namespace std;
#define ll long long
#define f first
#define endl "\n"
#define s second
#define pii pair<int,int>
#define ppii pair<pii,pii>
#define vi vector<int>
#define pb push_back
//#define p push
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define F(n) for(int i=0;i<n;i++)
#define lb lower_bound
#define ub upper_bound
#define fastio ios::sync_with_stdio(false);cin.tie(NULL);
using namespace std;
#define int long long
const int mod=9901,mxn=3*1e5+5,inf=1e18,lg=25,minf=-1e18;
int n;
struct seg{
    int v[2*mxn+10];
    void update(int pos,int val){
        pos+=n;
        v[pos]=val;
        for(;pos>0;pos>>=1)v[pos>>1]=max(v[pos],v[pos^1]);
    }
    int qry(int l,int r){
        int ans=0;
        for(l+=n,r+=n;l<=r;l>>=1,r>>=1){
            if(l&1)ans=max(ans,v[l++]);
            if(!(r&1))ans=max(ans,v[r--]);
        }
        return ans;
    }
}t[2];
set<int>s;
int32_t main(){
    fastio
    int d,l,r,pos,mid,ans,lastval;cin>>n>>d;
    vector<pii>v(n);
    for(int i=0;i<n;i++)cin>>v[i].f,v[i].s=i;
    sort(all(v));
    vector<pii>up;
    for(int i=0;i<v.size();i++){
        int cur=i;
        up.clear();
        while(cur<n&&v[i].f==v[cur].f){
			l=0,r=v[cur].s;
			pos=inf;
			s.insert(v[cur].s);
			auto it=s.lb(v[cur].s);
			if(it!=s.begin()){
				it--;
				lastval=t[1].v[(*it)+n];
				t[1].update((*it),v[cur].s-(*it));
				it++;
			}
			while(l<=r){
				mid=l+(r-l)/2;
				if(t[1].qry(mid,v[cur].s)<=d)pos=min(pos,mid),r=mid-1;
				else l=mid+1;
			}
			if(it!=s.begin())it--,t[1].update((*it),lastval),it++;
			s.erase(it);
			up.pb({v[cur].s,t[0].qry(pos,v[cur].s)+1});
            cur++;
        }
        i=cur-1;
        for(auto i:up){
			ans=i.s;
			s.insert(i.f);
			auto it=s.lb(i.f);
			if(it!=s.begin()){
				it--;
				ans=(i.f-(*it)<=d)?ans:1ll;
				t[1].update((*it),i.f-(*it));
				it++;
			}
			it++;
			if(it!=s.end())t[1].update(i.f,(*it)-i.f);
			t[0].update(i.f,ans);
		}
    }
	cout<<t[0].qry(0,n);
}

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:58:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |     for(int i=0;i<v.size();i++){
      |                 ~^~~~~~~~~
Main.cpp:38:15: warning: 'lastval' may be used uninitialized in this function [-Wmaybe-uninitialized]
   38 |         v[pos]=val;
      |         ~~~~~~^~~~
Main.cpp:53:27: note: 'lastval' was declared here
   53 |     int d,l,r,pos,mid,ans,lastval;cin>>n>>d;
      |                           ^~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 20 / 20
• Subtask 4: 12 / 12
• Subtask 5: 5 / 5
• Subtask 6: 35 / 35