Submission #883502

#	Time	Username	Problem	Language	Result	Execution time	Memory
883502		ono_de206	Rail (IOI14_rail)	C++14	30 / 100	81 ms	98560 KiB

rail

#include "rail.h"
#include<bits/stdc++.h>
using namespace std;

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

//#define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

void findLocation(int n, int first, int pos[], int tp[]) {
	pos[0] = first;
	tp[0] = 1;

	if(n == 1) return;

	vector<vector<int>> dis(n, vector<int>(n, -1));

	auto get = [&](int x, int y) -> int {
		if(x > y) swap(x, y);
		if(dis[x][y] != -1) return dis[x][y];
		return dis[x][y] = getDistance(x, y);
	};

	vector<int> id(n - 1);
	iota(all(id), 1);
	sort(all(id), [&](int x, int y) {
		return get(0, x) < get(0, y);
	});

	vector<int> res;
	int ls = id[0], tmp = id[0];
	id.erase(id.begin());

	tp[ls] = 2;
	pos[ls] = pos[0] + get(0, ls);

	for(int x : id) {
		if(get(0, x) + get(0, ls) == get(x, ls)) {
			tp[x] = 2;
			pos[x] = pos[0] + get(0, x);
			ls = x;
		} else {
			if(pos[ls] - get(ls, x) >= pos[0]) {
				tp[x] = 1;
				pos[x] = pos[ls] - get(ls, x);
			} else {
				res.pb(x);
			}
		}
	}
	if(res.size()) {
		int ls = res[0];
		res.erase(res.begin());
		tp[ls] = 1;
		pos[ls] = pos[0] - get(0, ls) + 2 * get(0, tmp);
		for(int x : res) {
			if(get(0, x) + get(0, ls) - 2 * get(0, tmp) == get(ls, x)) {
				tp[x] = 1;
				pos[x] = pos[0] - get(0, x) + 2 * get(0, tmp);
				ls = x;
			} else {
				tp[x] = 2;
				pos[x] = pos[ls] + get(ls, x);
			}
		}
	}
	// for(int i = 0; i < n; i++) {
	// 	assert(pos[i] >= 0 && pos[i] < 1000000);
	// }
}

• Subtask 1: 8 / 8
• Subtask 2: 22 / 22
• Subtask 3: 0 / 26
• Subtask 4: 0 / 44