Submission #385991

#	Time	Username	Problem	Language	Result	Execution time	Memory
385991		Keshi	Holiday (IOI14_holiday)	C++17	47 / 100	5050 ms	8064 KiB

holiday

//In the name of God
#include <bits/stdc++.h>
#include"holiday.h"
using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;

const ll maxn = 2e5 + 100;
const ll mod = 1e9 + 7;
const ll inf = 1e18;

#define fast_io ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io freopen("input.txt", "r+", stdin);freopen("output.txt", "w+", stdout);
#define pb push_back
#define Mp make_pair
#define F first
#define S second
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()
#define lc (id << 1)
#define rc (id << 1 | 1)

ll a[maxn];
ll seg[maxn << 2], cnt[maxn << 2];
pll b[maxn];

void upd(ll id, ll s, ll e, ll i, ll x){
	if(i < s || e <= i) return;
	if(e - s == 1){
		cnt[id] += x;
		seg[id] += x * a[s];
		return;
	}
	ll mid = (s + e) >> 1;
	upd(lc, s, mid, i, x);
	upd(rc, mid, e, i, x);
	cnt[id] = cnt[lc] + cnt[rc];
	seg[id] = seg[lc] + seg[rc];
	return;
}
ll get(ll id, ll s, ll e, ll x){
	if(x <= 0) return 0;
	if(x >= cnt[id]) return seg[id];
	ll mid = (s + e) >> 1;
	return get(rc, mid, e, x) + get(lc, s, mid, x - cnt[rc]);
}

ll cal(ll s, ll l, ll r){
	return r - l + min(r - s, s - l);
}

long long int findMaxAttraction(int n, int start, int d, int at[]){
	for(ll i = 0; i < n; i++){
		b[i] = Mp(at[i], i);
	}
	sort(b, b + n);
	for(ll i = 0; i < n; i++){
		a[i] = b[i].F;
		at[b[i].S] = i;
	}
	ll ans = 0;
	for(ll i = 0; i <= start; i++){
		upd(1, 0, n, at[start - i], 1);
		ans = max(ans, get(1, 0, n, d - cal(start, start - i, start)));
		for(ll j = start + 1; j < n; j++){
			upd(1, 0, n, at[j], 1);
			ans = max(ans, get(1, 0, n, d - cal(start, start - i, j)));
		}
		for(ll j = start + 1; j < n; j++){
			upd(1, 0, n, at[j], -1);
		}
	}
	return ans;
}

/*int main(){
    fast_io;



    return 0;
}*/

• Subtask 1: 7 / 7
• Subtask 2: 23 / 23
• Subtask 3: 17 / 17
• Subtask 4: 0 / 53