Submission #123721

#	Time	Username	Problem	Language	Result	Execution time	Memory
123721		turbat	Robots (IOI13_robots)	C++14	0 / 100	2 ms	380 KiB

robots

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

int a, b, t, *x, *y, *w, *s, cnt;
set <int> se;
pair <int, int> p[1000005];

bool can(int k){
	se.clear();
	int j = 0;
	for (int i = 0;i < a;i++){
		while (j < t && p[j].first < x[i])
			se.insert(s[p[j++].second]);
		cnt = k;
		while (cnt-- && !se.empty()) {
			auto it = se.end();
			it--;
			se.erase(it);
		}
	}
	for (;j < t;j++) se.insert(s[p[j].second]);
	j = 0;
	cnt = k;
	// cout << k << endl;
	// for (auto a : se) cout << a << ' ';
	// cout << endl; 
	for (auto a : se){
		while (j < b && (!cnt || a >= y[j])){
			j++;
			cnt = k;
		}
		if (j == b) return 0;
		cnt--;
	}
	return 1;
}

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
	a = A, b = B, t = T, x = X, y = Y, w = W, s = S;
	sort(x, x + a);
	sort(y, y + b);
	for (int i = 0;i < t;i++){
		if (w[i] >= x[a - 1] && s[i] >= y[b - 1]) 
			return -1;
		p[i].first = w[i];
		p[i].second = i;
	}
	sort(p, p + t);
	// for (int i = 0;i < t;i++)
	// 	cout << p[i].first << ' '<< s[p[i].second] << endl;
	// for (int i = 0;i < a;i++) cout << x[i] << endl;
	// cout << endl;
	// for (int i = 0;i < b;i++) cout << y[i] << ' ';
	// cout << endl;
	int l = 1, r = t, mid;
	while (l != r){
		mid = (l + r) / 2;
		if (can(mid)) r = mid;
		else l = mid + 1;
	}
    return l + 1;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 25
• Subtask 4: 0 / 37
• Subtask 5: 0 / 10