Submission #116916

#	Time	Username	Problem	Language	Result	Execution time	Memory
116916		nhimnam120	Doktor (COCI17_doktor)	C++14	100 / 100	288 ms	46508 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[tam1[i][j] + i] + fixedd[i - tam1[i][j] - 1])){
                mdx = j + 1 - fixedd[tam1[i][j] + i] + 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()) continue;
        sort(tam2[i].begin(), tam2[i].end());
        for(long long j = tam2[i].size() - 1; j >= 0; j--){
            if(mdx < (j + 1 - fixedd[tam2[i][j] + i + 1] + fixedd[i - tam2[i][j] - 1])){
                mdx = j + 1 - fixedd[tam2[i][j] + i + 1] + fixedd[i - tam2[i][j] - 1];
                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