oj.uz

Submission #855654

# Submission time Handle Problem Language Result Execution time Memory
855654 2023-10-01T15:53:58 Z MilosMilutinovic Sequence (APIO23_sequence) C++17
0 / 100
 2000 ms 149228 KB 
#include "sequence.h"
#include <bits/stdc++.h>
 
#define pb push_back
#define fi first
#define se second
#define mp make_pair
 
using namespace std;
 
typedef long long ll;
typedef pair<int,int> pii;
 
int readint(){
    int x=0,f=1; char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
    return x*f;
}
 
int n,a[5000500],val[5000500],pref[5000500];
vector<int> pos[5000500];

int query_mn(int l,int r){
	int mn=1e9;
	for(int i=l;i<=r;i++) mn=min(mn,pref[i]);
	return mn;
}
int query_mx(int l,int r){
	int mx=-1e9;
	for(int i=l;i<=r;i++) mx=max(mx,pref[i]);
	return mx;
}

int min_diff(int l1,int r1,int l2,int r2){
	if(max(l1,l2)<=min(r1,r2)) return 0;
	return min(abs(l1-r2),abs(l2-r1));
}

bool good(int l,int r,int c){
	return min_diff(query_mn(0,l),query_mx(0,l),query_mn(r,n),query_mx(r,n))<=c;
}
 
int sequence(int N,vector<int> A) {
    n=N; for(int i=1;i<=n;i++) a[i]=A[i-1];
    for(int i=1;i<=n;i++) pos[a[i]].pb(i);
    //build(1,1,n);
    for(int i=1;i<=n;i++) val[i]=1;
	int ans=0;
	for(int v=1;v<=n;v++){
		if(pos[v].empty()) continue;
		for(int j:pos[v]) val[j]--;
		for(int i=1;i<=n;i++) pref[i]=pref[i-1]+val[i];
		int sz=(int)pos[v].size();
		int ptr=0;
		for(int i=0;i<sz;i++){
			while(ptr<sz&&good(pos[v][i],pos[v][ptr],ptr-i+1)) ptr++;
			ans=max(ans,ptr-i);
		}
		for(int j:pos[v]) val[j]--;
	}
    return ans;
}

Subtask #1
0.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 123476 KB Output is correct
2 Correct 25 ms 123620 KB Output is correct
3 Correct 27 ms 123740 KB Output is correct
4 Correct 25 ms 123484 KB Output is correct
5 Correct 25 ms 123740 KB Output is correct
6 Incorrect 25 ms 123740 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 123476 KB Output is correct
2 Correct 25 ms 123620 KB Output is correct
3 Correct 27 ms 123740 KB Output is correct
4 Correct 25 ms 123484 KB Output is correct
5 Correct 25 ms 123740 KB Output is correct
6 Incorrect 25 ms 123740 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 123476 KB Output is correct
2 Execution timed out 2045 ms 143600 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 123620 KB Output is correct
2 Execution timed out 2027 ms 135836 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 13.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2027 ms 149228 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 123476 KB Output is correct
2 Correct 25 ms 123620 KB Output is correct
3 Correct 27 ms 123740 KB Output is correct
4 Correct 25 ms 123484 KB Output is correct
5 Correct 25 ms 123740 KB Output is correct
6 Incorrect 25 ms 123740 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #7
0.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 123476 KB Output is correct
2 Correct 25 ms 123620 KB Output is correct
3 Correct 27 ms 123740 KB Output is correct
4 Correct 25 ms 123484 KB Output is correct
5 Correct 25 ms 123740 KB Output is correct
6 Incorrect 25 ms 123740 KB Output isn't correct
7 Halted 0 ms 0 KB -