Submission #993364

#	Time	Username	Problem	Language	Result	Execution time	Memory
993364		vqpahmad	Robots (IOI13_robots)	C++14	100 / 100	1252 ms	24432 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef ONPC
#include"debug.h"
#else
#define debug(...) 42
#endif
#define ll long long
#define pii pair<int,int>
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }
const int mod = 1e9 + 7;
const int MAXN = 1e6 + 15;
const int inf = 0x3f3f3f3f;
const ll INF = 0x3f3f3f3f3f3f3f3f;

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
	sort(X, X + A);
	sort(Y, Y + B);
	int mxW = (A ? X[A - 1] : -1);
	int mxS = (B ? Y[B - 1] : -1);
	for (int i = 0; i < T; i++){
		if (W[i] >= mxW && S[i] >= mxS){
			return -1;
		}
	}
	vector<pii> robots(T);
	for (int i = 0; i < T; i++) robots[i] = {W[i], S[i]};
	sort(all(robots));
	int lo = 0, hi = T;
	while (hi - lo > 1){
		int mi = (lo + hi) / 2;
		priority_queue<int> pq;
		int p = 0;
		for (int i = 0; i < A; i++){
			while (p < T && robots[p].first < X[i]){
				pq.push(robots[p].second);
				p++;
			}
			for (int j = 0; j < mi; j++) {
				if (sz(pq)) pq.pop();
				else break;
			}
		}
		for (int i = p; i < T; i++) pq.push(robots[i].second);
		bool ok = 1;
		for (int i = B - 1; i >= 0; i--){
			if (sz(pq) == 0) break;
			if (Y[i] <= pq.top()){
				ok = 0;
			}
			for (int j = 0; j < mi; j++) {
				if (sz(pq)) pq.pop();
				else break;
			}
		}
		if (ok && sz(pq) == 0){
			hi = mi;
		} else {
			lo = mi;
		}
	}
	//if (hi == T + 1) hi = -1;
	return hi;
}

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