Submission #116650

#	Time	Username	Problem	Language	Result	Execution time	Memory
116650		roseanne_pcy	Robots (IOI13_robots)	C++14	100 / 100	1724 ms	29424 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;

const int maxn = 5e4+5;
const int maxt = 1e6+5;

int n, m, t; 

int x[maxn], y[maxn];
int w[maxt], s[maxt];

vector< ii > vec;

priority_queue<int> pq;

bool works(int lim)
{
	while(!pq.empty()) pq.pop();
	vector<int> rem;
	if(n == 0)
	{
		for(int i = 0; i< t; i++) rem.pb(vec[i].Y);
	}
	else
	{
		int pt = 0;
		for(int i = 0; i< n; i++)
		{
			while(pt< t && vec[pt].X< x[i])
			{
				pq.push(vec[pt].Y);
				pt++;
			}
			int times = lim;
			while(!pq.empty() && times--) pq.pop();
		}
		while(!pq.empty())
		{
			rem.pb(pq.top()); pq.pop();
		}
		while(pt< t) rem.pb(vec[pt++].Y);
	}
	sort(rem.begin(), rem.end());
	int k = rem.size();
	int pt = 0, cnt = 0;
	for(int i = 0; i< m; i++)
	{
		while(pt< k && rem[pt]< y[i]) pt++, cnt++;
		cnt = max(cnt-lim, 0);
	}
	while(pt< k) pt++, cnt++;
	return cnt == 0;
}

int putaway(int A, int B, int T, int _X[], int _Y[], int _W[], int _S[])
{
	for(int i = 0; i< A; i++) x[i] = _X[i];
	for(int i = 0; i< B; i++) y[i] = _Y[i];
	for(int i = 0; i< T; i++)
	{
		w[i] = _W[i];
		s[i] = _S[i];
	}
	n = A; m = B; t = T;
	for(int i = 0; i< t; i++) vec.pb(ii(w[i], s[i]));
	sort(vec.begin(), vec.end());
	sort(x, x+n); sort(y, y+m);
	int lo = 1, hi = T;
	while(lo< hi)
	{
		int mid = (lo+hi)/2;
		if(works(mid)) hi = mid;
		else lo = mid+1;
	}
	if(works(lo)) return lo;
	return -1;
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 25 / 25
• Subtask 4: 37 / 37
• Subtask 5: 10 / 10