Submission #384068

#	Time	Username	Problem	Language	Result	Execution time	Memory
384068		MODDI	Dancing Elephants (IOI11_elephants)	C++14	26 / 100	9101 ms	19052 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define vi vector<int>
#define vl vector<ll>
#define mp make_pair
#define pb push_back
#define MAX_N 1000000
#define MAX_M 1000000
using namespace std;
vi tree[4 * 150000], arr;
int Ltree[4 * 150000], l, n;
int calc(vi pos){
	int rez = 0, last = -1;
	for(int i = 0; i < (int)pos.size(); i++){
		if(pos[i] > last)
		{
			last = pos[i] + l;
			rez++;
		}
		else
			continue;
	}
	return rez;
}
void build(int node, int l, int r){
	if(l == r){
		vi nov;
		nov.pb(arr[l]);
		tree[node] = nov;
		Ltree[node] = 1;
	}
	else{
		int mid = (l + r) / 2;
		build(node * 2, l, mid);
		build(node * 2 + 1, mid + 1, r);
		merge(tree[node * 2].begin(), tree[node * 2].end(), tree[node * 2 + 1].begin(), tree[node * 2  + 1].end(), back_inserter(tree[node]));
		Ltree[node] = calc(tree[node]);
	}
}
void update1(int node, int l, int r, int pos, int val){
	if(l == r)
	{
		tree[node].clear();
		tree[node].pb(val);
		Ltree[node] = 1;
		return ;
	}
	int mid = (l + r) / 2;
	if(pos <= mid)
		update1(node * 2, l, mid, pos, val);
	else
		update1(node * 2 + 1, mid + 1, r, pos, val);
	tree[node].clear();
	merge(tree[node * 2].begin(), tree[node *2].end(), tree[node * 2 + 1].begin(), tree[node *2 + 1].end(), back_inserter(tree[node]));
	Ltree[node] = calc(tree[node]);
}
void init(int N, int L, int X[])
{
	n = N;
	l = L;
	arr.resize(n);
	for(int i = 0; i < n; i++){
		arr[i] = X[i];
	}
	build(1, 0, n - 1);
}

int update(int i, int y)
{

	update1(1, 0, n - 1, i, y);
	return Ltree[1];
}

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 47
• Subtask 5: 0 / 3