제출 #288984

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
288984		user202729	선물상자 (IOI15_boxes)	C++17	100 / 100	771 ms	73000 KiB

boxes

// moreflags=grader.cpp
//
// 10
#include "boxes.h"
#include<vector>
#include<cstdint>
#include<climits>
#include<deque>

long long delivery(int N, int K, int L, int p[]) {
	std::deque<std::pair<int, int64_t>> queue, queueAdd;
	queue.push_back({N, 0});
	queueAdd.push_back({N, 2*p[N-1]});

	for(auto index=N;;){
		--index;

		int64_t curValue=INT64_MAX;
		for(auto pointer: {&queue, &queueAdd}){
			auto& it=*pointer;
			while(it.back().first>index+K) it.pop_back();
		}
		curValue=std::min(curValue, queue.back().second+ std::min(L, 2* (L-p[index])));
		curValue=std::min(curValue, queueAdd.back().second);

		if(index==0) return curValue;

		auto const add=[&](auto& queue, int64_t value){
			while(not queue.empty() and queue.front().second>=value)
				queue.pop_front();
			queue.push_front({index, value});
		};
		add(queue, curValue);
		add(queueAdd, curValue+2*p[index-1]);
	}
}

컴파일 시 표준 에러 (stderr) 메시지

boxes.cpp: In lambda function:
boxes.cpp:28:48: warning: declaration of 'queue' shadows a previous local [-Wshadow]
   28 |   auto const add=[&](auto& queue, int64_t value){
      |                                                ^
boxes.cpp:11:38: note: shadowed declaration is here
   11 |  std::deque<std::pair<int, int64_t>> queue, queueAdd;
      |                                      ^~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30