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Submission #919881

# Submission time Handle Problem Language Result Execution time Memory
919881 2024-02-01T18:46:23 Z JakobZorz Sequence (APIO23_sequence) C++17
0 / 100
 2000 ms 44008 KB 
#include"sequence.h"
#include<vector>
#include<iostream>
using namespace std;

const int TREE_SIZE=1<<19;

int n;
vector<int>arr[500000];
int tree_lazy[2*TREE_SIZE];
int tree_min[2*TREE_SIZE];
int tree_max[2*TREE_SIZE];

void push_lazy(int node){
    if(tree_lazy[node]!=0){
        tree_min[node]+=tree_lazy[node];
        tree_max[node]+=tree_lazy[node];
        if(node<TREE_SIZE){
            tree_lazy[2*node]+=tree_lazy[node];
            tree_lazy[2*node+1]+=tree_lazy[node];
        }
        tree_lazy[node]=0;
    }
}

int get_min(int node,int rl,int rr,int l,int r){
    push_lazy(node);
    if(r<=rl||rr<=l)
        return 1e8;
    if(l<=rl&&rr<=r)
        return tree_min[node];
    int mid=(rl+rr)/2;
    return min(get_min(2*node,rl,mid,l,r),get_min(2*node+1,mid,rr,l,r));
}

int get_max(int node,int rl,int rr,int l,int r){
    push_lazy(node);
    if(r<=rl||rr<=l)
        return -1e8;
    if(l<=rl&&rr<=r)
        return tree_max[node];
    int mid=(rl+rr)/2;
    return max(get_max(2*node,rl,mid,l,r),get_max(2*node+1,mid,rr,l,r));
}

int get_min(int l,int r){
    return get_min(1,0,TREE_SIZE,l,r);
}

int get_max(int l,int r){
    return get_max(1,0,TREE_SIZE,l,r);
}

void add(int node,int rl,int rr,int l,int r,int v){
    push_lazy(node);
    if(r<=rl||rr<=l)
        return;
    if(l<=rl&&rr<=r){
        tree_lazy[node]+=v;
        push_lazy(node);
        return;
    }
    int mid=(rl+rr)/2;
    add(2*node,rl,mid,l,r,v);
    add(2*node+1,mid,rr,l,r,v);
    tree_min[node]=min(tree_min[2*node],tree_min[2*node+1]);
    tree_max[node]=max(tree_max[2*node],tree_max[2*node+1]);
}

void add(int l,int r,int v){
    add(1,0,TREE_SIZE,l,r,v);
}

int sequence(int N,vector<int>A){
    n=N;
    for(int i=0;i<n;i++)
        arr[A[i]-1].push_back(i);
    for(int i=0;i<=n;i++)
        add(i,i+1,-i);
    
    int res=1;
    for(int v=0;v<n;v++){
        for(int idx:arr[v])
            add(idx+1,n+1,1);
        
        vector<int>mn1,mn2,mx1,mx2;
        int idx=0;
        int prev_mn1=1e8;
        int prev_mx1=-1e8;
        for(int i:arr[v]){
            mn1.push_back(min(prev_mn1,get_min(0,i+1)+idx));
            prev_mn1=mn1.back();
            mn2.push_back(get_min(i,n+1)-idx);
            mx1.push_back(max(prev_mx1,get_max(0,i+1)-idx+1));
            prev_mx1=mx1.back();
            mx2.push_back(get_max(i,n+1)+idx+1);
            idx++;
        }
        
        for(int r=0;r<(int)arr[v].size();r++){
            int l1=0,l2=0;
            {
                int rl=-1,rr=r;
                while(rl<rr-1){
                    int m=(rl+rr)/2;
                    if(mx1[m]<mn2[r])
                        rl=m;
                    else
                        rr=m;
                }
                l1=rl;
            }
            while(l2<r&&mx2[r]<mn1[l2])
                l2++;
            
            int l=max(l1,l2);
            res=max(res,r-l+1);
        }
        
        for(int idx:arr[v])
            add(idx+1,n+1,1);
    }
    
    return res;
}

Subtask #1
0.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 15960 KB Output is correct
2 Correct 4 ms 15964 KB Output is correct
3 Correct 4 ms 15964 KB Output is correct
4 Incorrect 4 ms 15960 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 15960 KB Output is correct
2 Correct 4 ms 15964 KB Output is correct
3 Correct 4 ms 15964 KB Output is correct
4 Incorrect 4 ms 15960 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 15960 KB Output is correct
2 Correct 1291 ms 37968 KB Output is correct
3 Correct 1295 ms 38224 KB Output is correct
4 Execution timed out 2048 ms 31504 KB Time limit exceeded
5 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 15964 KB Output is correct
2 Correct 1102 ms 39456 KB Output is correct
3 Execution timed out 2036 ms 34504 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1370 ms 43740 KB Output is correct
2 Correct 1375 ms 44008 KB Output is correct
3 Correct 1361 ms 43156 KB Output is correct
4 Correct 1371 ms 43244 KB Output is correct
5 Correct 1396 ms 40028 KB Output is correct
6 Correct 1356 ms 39820 KB Output is correct
7 Incorrect 1280 ms 38692 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 15960 KB Output is correct
2 Correct 4 ms 15964 KB Output is correct
3 Correct 4 ms 15964 KB Output is correct
4 Incorrect 4 ms 15960 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 15960 KB Output is correct
2 Correct 4 ms 15964 KB Output is correct
3 Correct 4 ms 15964 KB Output is correct
4 Incorrect 4 ms 15960 KB Output isn't correct
5 Halted 0 ms 0 KB -