제출 #31944

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
31944		szawinis	Robots (IOI13_robots)	C++14	100 / 100	2866 ms	18692 KiB

robots

#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
const int MAX = (1e6)+1;

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
	vector<pair<int,int> > toys;
	for(int i = 0; i < T; i++) toys.emplace_back(W[i], S[i]);
	sort(toys.begin(), toys.end());
	sort(X, X+A);
	sort(Y, Y+B);
	auto check = [&] (int lim) {
		priority_queue<pair<int,int> > pq;
		bitset<MAX> mark;
		int j = 0;
		for(int i = 0; i < A; i++) {
			while(j < toys.size() && toys[j].first < X[i]) {
				pq.emplace(toys[j].second, j);
				++j;
			}
			for(int k = 0; k < lim && !pq.empty(); k++) {
				mark[pq.top().second] = 1;
				pq.pop();
			}
		}
		while(j < toys.size()) pq.emplace(toys[j].second, j), ++j;
		for(int i = B-1; i >= 0; i--) {
			for(int k = 0; k < lim && !pq.empty() && pq.top().first < Y[i]; k++) {
				mark[pq.top().second] = 1;
				pq.pop();
			}
		}
		return mark.count() == T;
	};
	int l = 1, r = T;
	while(l < r) {
		int mid = l+r >> 1;
		if(check(mid)) r = mid;
		else l = mid+1;
	}
	if(!check(l)) return -1;
	else return l;
}

컴파일 시 표준 에러 (stderr) 메시지

robots.cpp: In lambda function:
robots.cpp:17:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    while(j < toys.size() && toys[j].first < X[i]) {
            ^
robots.cpp:26:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j < toys.size()) pq.emplace(toys[j].second, j), ++j;
           ^
robots.cpp:33:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   return mark.count() == T;
                       ^
robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:37:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   int mid = l+r >> 1;
              ^

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