Submission #976746

#	Time	Username	Problem	Language	Result	Execution time	Memory
976746		Amaarsaa	Boxes with souvenirs (IOI15_boxes)	C++14	20 / 100	1 ms	600 KiB

boxes

#include<bits/stdc++.h>
#include "boxes.h"
using namespace std;
using ll = long long ;

ll delivery(int N, int K, int L, int p[]) {
	ll ans, cnt_ard, cnt_urd, res;
	vector < ll > ard, urd;
	ll cnt = 0, i, j, r, s;
	for (i = 0; i < N; i ++) {
		if ( p[i] * 2 > L) {
			ard.push_back(p[i]);
		}
		else {
			if (p[i] * 2 < L) urd.push_back(p[i]);
			else cnt ++;
		}
	}
	ans = 0;
	for (i = K - 1; i < urd.size(); i += K) {
		ans += urd[i];
	}
	j = i - K + 1;
	reverse(ard.begin(), ard.end());
	for (i = K - 1; i < ard.size(); i += K) {
		ans += (L - ard[i]);
	}
	r = i - K + 1;
	ans *= 2;
	cnt_urd = urd.size() - j;
	cnt_ard = ard.size() - r;
	res = ((cnt_ard + cnt_urd + cnt + K - 1) / K) * L;
	if ( cnt_ard != 0) {
		res = min(res, (((L - ard.back()) * 2) + ((cnt_urd + cnt + K - 1)/K) * L) );
	}
	if ( cnt_urd != 0) {
		res = min(res, (((urd.back()) * 2) + ((cnt_ard + cnt + K - 1)/K) * L) );
	}
	if ( cnt_ard != 0 && cnt_urd != 0) {
		res = min(res, (((L - ard.back()) * 2) + (urd.back() * 2)+ ((cnt + K - 1)/K) * L) );
	}
	
	return res + ans;
	
}

Compilation message (stderr)

boxes.cpp: In function 'll delivery(int, int, int, int*)':
boxes.cpp:20:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (i = K - 1; i < urd.size(); i += K) {
      |                  ~~^~~~~~~~~~~~
boxes.cpp:25:20: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |  for (i = K - 1; i < ard.size(); i += K) {
      |                  ~~^~~~~~~~~~~~
boxes.cpp:9:23: warning: unused variable 's' [-Wunused-variable]
    9 |  ll cnt = 0, i, j, r, s;
      |                       ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30