Submission #968599

#	Time	Username	Problem	Language	Result	Execution time	Memory
968599		alex_2008	Boxes with souvenirs (IOI15_boxes)	C++17	Compilation error	0 ms	0 KiB

boxes

//#include "boxes.h"
#include <iostream>
#include <vector>
#include <algorithm>
typedef long long ll;
using namespace std;
ll delivery(int n, int k, int l, vector <int> pos) {
	vector <int> a, b;
	vector <ll> dp_a, dp_b;
	for (int i = 0; i < n; i++) {
		if (pos[i] <= (l / 2)) a.push_back(pos[i]);
		else b.push_back(pos[i]);
	}
	reverse(b.begin(), b.end());
	for (auto &it : b) {
		it = l - it;
	}
	dp_a.resize((int)a.size());
	dp_b.resize((int)b.size());
	for (int i = 0; i < (int)dp_a.size(); i++) {
		if (i < k) {
			dp_a[i] = 2 * a[i];
		}
		else {
			dp_a[i] = dp_a[i - k] + 2 * a[i];
		}
	}
	for (int i = 0; i < (int)dp_b.size(); i++) {
		if (i < k) {
			dp_b[i] = 2 * b[i];
		}
		else {
			dp_b[i] = dp_b[i - k] + 2 * b[i];
		}
	}
	int ind1 = 0, ind2 = 0;
	ll ans = l * 1ll * ((n + k - 1) / k);
	ll cur = 0;
	for (int i = 1; i <= n; i++) {
		if (ind1 == (int)dp_a.size()) {
			if (ind2) cur -= dp_b[ind2 - 1];
			cur += dp_b[ind2];
			ind2++;
		}
		else if (ind2 == (int)dp_b.size()) {
			if (ind1) cur -= dp_a[ind1 - 1];
			cur += dp_a[ind1];
			ind1++;
		}
		else {
			ll diff1 = dp_a[ind1];
			if (ind1) diff1 -= dp_a[ind1 - 1];
			ll diff2 = dp_b[ind2];
			if (ind2) diff2 -= dp_b[ind2 - 1];
			if (diff1 <= diff2) {
				cur += diff1;
				ind1++;
			}
			else {
				cur += diff2;
				ind2++;
			}
		}
		ans = min(ans, ((n - i + k - 1) / k * 1ll * l) + cur);
	}
	return ans;
}

int main() {
	int n, k, l;
	cin >> n >> k >> l;
	vector <int> v(n);
	for (auto &it : v) {
		cin >> it;
	}
	cout << delivery(n, k, l, v) << "\n";
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccSlnO9q.o: in function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'; /tmp/ccBQoaxq.o:boxes.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccSlnO9q.o: in function `main':
grader.c:(.text.startup+0x1ef): undefined reference to `delivery(int, int, int, int*)'
collect2: error: ld returned 1 exit status