Submission #223602

#	Time	Username	Problem	Language	Result	Execution time	Memory
223602		staniewzki	Robots (IOI13_robots)	C++17	100 / 100	1942 ms	24368 KiB

robots

#include<bits/stdc++.h>
using namespace std;
 
#define REP(i, n) for(int i = 0; i < n; i++)

using PII = pair<int, int>;

#include "robots.h"

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
	sort(X, X + A), sort(Y, Y + B);

	vector<PII> pts(T);
	REP(i, T) pts[i] = {W[i], S[i]};
	sort(pts.begin(), pts.end());

	auto check = [&](int q) {
		priority_queue<int> Q;
		int cur = 0;
		REP(i, A + 1) {
			while(cur < size(pts) && (i == A || pts[cur].first < X[i]))
				Q.emplace(pts[cur++].second);

			if(i != A) REP(j, q) {
				if(Q.empty()) break;
				Q.pop();
			}
		}

		for(int i = B - 1; i >= 0; i--) {
			REP(j, q) {
				if(Q.empty()) break;
				if(Q.top() >= Y[i]) return false;
				Q.pop();
			}
		}

		return Q.empty();
	};

	if(!check(T)) return -1;

	int l = 1, r = T;
	while(l < r) {
		int m = (l + r) / 2;
		if(check(m))
			r = m;
		else
			l = m + 1;
	}

	return l;
}

Compilation message (stderr)

robots.cpp: In lambda function:
robots.cpp:21:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(cur < size(pts) && (i == A || pts[cur].first < X[i]))
          ~~~~^~~~~~~~~~~

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