Submission #301817

#	Time	Username	Problem	Language	Result	Execution time	Memory
301817		square1001	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	610 ms	255060 KiB

boxes

#include "boxes.h"
#include <vector>
#include <algorithm>
using namespace std;
long long delivery(int N, int K, int L, int p[]) {
	vector<int> pl, pr;
	for(int i = 0; i < N; ++i) {
		if(p[i] * 2 <= L) {
			pl.push_back(p[i]);
		}
		else {
			pr.push_back(L - p[i]);
		}
	}
	reverse(pr.begin(), pr.end());
	int NL = pl.size(), NR = pr.size();
	vector<long long> dpl(NL + 1), dpr(NR + 1);
	for(int i = 0; i < NL; ++i) {
		dpl[i + 1] = dpl[max(i - K + 1, 0)] + pl[i];
	}
	for(int i = 0; i < NR; ++i) {
		dpr[i + 1] = dpr[max(i - K + 1, 0)] + pr[i];
	}
	long long ans = dpl[NL] * 2 + dpr[NR] * 2;
	for(int i = 0; i <= NL; ++i) {
		int t = N - i - K;
		if(0 <= t && t <= NR) {
			ans = min(ans, dpl[i] * 2 + dpr[t] * 2 + L);
		}
	}
	return ans;
}

Compilation message (stderr)

boxes.cpp: In function 'long long int delivery(int, int, int, int*)':
boxes.cpp:16:18: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   16 |  int NL = pl.size(), NR = pr.size();
      |           ~~~~~~~^~
boxes.cpp:16:34: warning: conversion from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   16 |  int NL = pl.size(), NR = pr.size();
      |                           ~~~~~~~^~

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