Submission #102779

#	Time	Username	Problem	Language	Result	Execution time	Memory
102779		naoai	Rail (IOI14_rail)	C++14	0 / 100	795 ms	98468 KiB

rail

#include "rail.h"
#include <bits/stdc++.h>

using namespace std;

const int nmax = 5000;

static int n;
bool fix[nmax + 1];
int v[nmax + 1], tip[nmax + 1];

pair<int, int> mn[nmax + 1];
int d[nmax + 1][nmax + 1];

void recalc (int x) {
    mn[x] = {1 << 30, -1};
    for (int i = 0; i < n; ++ i) {
        if (fix[i] == 0 && d[x][i] < mn[x].first) {
            mn[x] = {d[x][i], i};
        }
    }
}

void findLocation(int N, int first, int location[], int stype[]) {
    for (int i = 0; i < N; ++ i)
        for (int j = i + 1; j < N; ++ j) {
            int x = getDistance(i, j);
            d[i][j] = d[j][i] = x;
        }

    n = N;

    v[0] = first;
    tip[0] = 1;
    fix[0] = 1;
    recalc(0);

    for (int step = 0; step < N - 1; ++ step) {
        int x, y, e = 1 << 30;
        x = y = -1;

        for (int i = 0; i < N; ++ i) {
            if (fix[i] == 1) {
                if (mn[i].first < e) {
                    x = i;
                    y = mn[i].second;
                    e = mn[i].first;
                }
            }
        }

        if (tip[x] == 1) {
            v[y] = v[x] + e;
            tip[y] = 2;
        } else {
            v[y] = v[x] - e;
            tip[y] = 1;
        }
        fix[y] = 1;

        recalc(x);
        recalc(y);
    }

    for (int i = 0; i < N; ++ i) {
        location[i] = v[i];
        stype[i] = tip[i];
    }
}

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