Submission #172316

#	Time	Username	Problem	Language	Result	Execution time	Memory
172316		maruii	Robots (IOI13_robots)	C++14	100 / 100	1950 ms	12908 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
using pii = pair<int, int>;
#define ff first
#define ss second

int A, B, T, *X, *Y, *W, *S;
pii P[1000005];

bool f(int m) {
	priority_queue<int> pq;
	int j = 0;
	for (int i = 0; i < A; ++i) {
		while (j < T && P[j].ff < X[i]) {
			pq.push(P[j].ss);
			j++;
		}
		for (int k = 0; pq.size() && k < m; ++k) pq.pop();
	}
	for (; j < T; ++j) pq.push(P[j].ss);
	for (int i = B - 1; i >= 0; --i) {
		for (int j = 0; pq.size() && j < m; ++j) {
			if (pq.top() >= Y[i]) return 0;
			pq.pop();
		}
	}
	return pq.size() == 0;
}

int putaway(int AA, int BB, int TT, int XX[], int YY[], int WW[], int SS[]) {
	A = AA, B = BB, T = TT, X = XX, Y = YY, W = WW, S = SS;
	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;
	for (int i = 0; i < T; ++i) P[i] = {W[i], S[i]};
	sort(P, P + T);
	int l = 1, r = T;
	while (l < r) {
		int m = l + r >> 1;
		if (f(m)) r = m;
		else l = m + 1;
	}
	return l;
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:41:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int m = l + r >> 1;
           ~~^~~

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