Submission #124232

#	Time	Username	Problem	Language	Result	Execution time	Memory
124232		KieranHorgan	Dancing Elephants (IOI11_elephants)	C++17	26 / 100	9069 ms	1144 KiB

elephants

#include "elephants.h"
#include <bits/stdc++.h>
using namespace std;

int n;
vector<int> a;

vector<int> isABegin;
vector<pair<int,int>> listOfBegins;

set<pair<int,int>> pos;
int L;
void init(int N, int L_, int X[]) {
	L = L_;
	n = N;
	a.resize(n);
	isABegin.resize(n);
	for(int i = 0; i < n; i++) {
		a[i] = X[i];
		// pos.insert({a[i], i});
	}
}

bool first = 1;
int update(int i, int y) {
	// pos.erase(make_pair(a[i], i));
	a[i] = y;
	// pos.insert(make_pair(a[i], i));

	vector<pair<int,int>> pos(n);
	for(int i = 0; i < n; i++)
		pos[i] = {a[i], i};
	sort(pos.begin(), pos.end());

	auto it = pos.begin();
	int l = it->first + L+1;
	int ans = 1;


	for(auto p: pos) {
		int i = p.second;
		int x = p.first;
		if(x >= l) {
			l = x + L + 1;
			ans++;
		}
	}
	return ans;
}

Compilation message (stderr)

elephants.cpp: In function 'int update(int, int)':
elephants.cpp:41:7: warning: unused variable 'i' [-Wunused-variable]
   int i = p.second;
       ^

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