Submission #116931

#	Time	Username	Problem	Language	Result	Execution time	Memory
116931		hungcung	Doktor (COCI17_doktor)	C++14	100 / 100	286 ms	47568 KiB

doktor

#include<bits/stdc++.h>
using namespace std;
long long fixedd[500005];
long long a[500005];
vector<long long> tam1[500005];
vector<long long> tam2[500005];
long long ans1,ans2;
signed main(){
	ios_base::sync_with_stdio(0);
	long long n;
	cin >> n;
	for(long long i=1;i<=n;i++){
		cin >> a[i];
		fixedd[i]=fixedd[i-1];
		if(a[i]==i){
			fixedd[i]++;
		}
		if((a[i]+i)%2==0){
			tam1[(a[i]+i)/2].push_back(abs(a[i]-i)/2);
		}
		else{
			tam2[(a[i]+i)/2].push_back(abs(a[i]-i)/2);
		}
	}
	ans1 = a[1];
	ans2 = a[1];
	long long mdx= -1000;
	for(long long i=1;i<=n;i++){
		if(tam1[i].size()==0){
			continue;
		}
		sort(tam1[i].begin(),tam1[i].end());
		for(long long j = tam1[i].size()-1;j>=0;j--){
			if(mdx < (j + 1 - (fixedd[i+tam1[i][j]] - fixedd[i - tam1[i][j] - 1]))){
				mdx = j + 1 - (fixedd[i+tam1[i][j]] - fixedd[i - tam1[i][j] - 1]);
				ans1 = a[i - tam1[i][j]];
				ans2 = a[i + tam1[i][j]];
			}
		}
	}
	for(long long i = 1; i < n; i++){
		if(tam2[i].size()==0){
			continue;
		}
		sort(tam2[i].begin(),tam2[i].end());
		for(long long j=tam2[i].size()-1;j>=0;j--){
			if(mdx < j + 1 - ( fixedd[ i + tam2[i][j] ] - fixedd[ i - tam2[i][j] ] ) ){
				mdx = j + 1 - ( fixedd[ i + tam2[i][j] ] - fixedd[ i - tam2[i][j] ] );
				ans1 = a[i-tam2[i][j]];
				ans2 = a[i+tam2[i][j]+1];
			}
		}
	}
	cout << ans1 << " " << ans2;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10