Submission #374370

#	Time	Username	Problem	Language	Result	Execution time	Memory
374370		Atill83	Doktor (COCI17_doktor)	C++14	100 / 100	250 ms	46060 KiB

doktor

#include <bits/stdc++.h>
#define ff first
#define ss second
#define endl '\n'
using namespace std;
const long long INF = (long long) 1e18;
const int mod = (int) 1e9+7;
const int MAXN = (int) 5e5+5;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
ll n;
int a[MAXN];
vector<int> deg[2*MAXN];
int pre[MAXN];
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);cout.tie(nullptr);

    #ifdef Local
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/int.txt","r",stdin);
        freopen("C:/Users/Admin/Desktop/Yazilim/C/IO/out.txt","w",stdout);
    #endif

    cin>>n;

    for(int i = 1; i <= n; i++){
        cin>>a[i];
        deg[i + a[i]].push_back(i);
        pre[i] = pre[i - 1] + (a[i] == i);
    }

    pii ans;
    int mx = -1;

    for(int i = 1; i <= n; i++){
        int l = i, r = a[i];
        if(r < l)
            swap(l, r);

        int df = (upper_bound(deg[l + r].begin(), deg[l + r].end(), r) - lower_bound(deg[l + r].begin(), deg[l + r].end(), l)) - (pre[r] - pre[l - 1]);

        if((r - l + 1) % 2){
            if(a[(r + l) / 2] == (r + l) / 2)
                df++;
        }
        if(df > mx){
            ans = {l, r};
            mx = df;
        }
    }

    cout<<a[ans.ff]<<" "<<a[ans.ss]<<endl;
    #ifdef Local
        cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

• 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