Submission #747012

#	Time	Username	Problem	Language	Result	Execution time	Memory
747012		vjudge1	Calvinball championship (CEOI15_teams)	C++17	0 / 100	3 ms	392 KiB

teams

#include <bits/stdc++.h>
#include <array>
#define all(v) (v.begin()), (v.end())
#define setall(a, val) for(auto& x : a) x = val
#define ll long long
#define cerr (cerr << "D: ")
clock_t start_time;
using namespace std;
double get_time() { return (double)(clock() - start_time) / CLOCKS_PER_SEC; }
void init(bool oj = 1) {
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	srand(time(0)); start_time = clock();
	if (oj) {
#ifndef ONLINE_JUDGE
		FILE* _ = freopen("in.txt", "r", stdin);
		//FILE* __ = freopen("out.txt", "w", stdout);
#endif
	}
}
const ll MOD = 1e9 + 7;
const ll N = 7e3 + 7;
const ll M = 2e3 + 7;
//####################################################################################

ll delivery(int N, int K, int L, vector<int> positions) {
	int l = 0, r = N - 1;
	ll ans = 0;
	while (l <= r) {
		ll a = 0;
		if (positions[max(l, r - K + 1)] > L / 2)
			a += 2 * (L - positions[max(l, r - K + 1)]);
		else if (positions[r] > L / 2)
			a += L;
		else
			a += 2 * positions[r];

		ll b = 0;
		if (positions[min(r, l + K - 1)] < L / 2)
			b += 2 * positions[min(r, l + K - 1)];
		else if (positions[l] < L / 2)
			b += L;
		else
			b += 2 * (L - positions[l]);

		if (a < b)
			r -= K, ans += a;
		else
			l += K, ans += b;
	}

	return ans;
}

int main() {
	init();

	int n, k, l;
	cin >> n >> k >> l;
	vector<int> p(n);
	for (int i = 0; i < n; i++)
		cin >> p[i];
	cout << delivery(n, k, l, p) << endl;

	cerr << get_time() << "s" << endl;
}

Compilation message (stderr)

teams.cpp: In function 'void init(bool)':
teams.cpp:15:9: warning: unused variable '_' [-Wunused-variable]
   15 |   FILE* _ = freopen("in.txt", "r", stdin);
      |         ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10