Submission #700501

#	Time	Username	Problem	Language	Result	Execution time	Memory
700501		Forested	Rail (IOI14_rail)	C++17	56 / 100	485 ms	98696 KiB

rail

#include "rail.h"

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

using i32 = int;
using i64 = long long;
template <typename T>
using Vec = vector<T>;

#define OVERRIDE4(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i)
#define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i)
#define REP(...) OVERRIDE4(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define ALL(x) begin(x), end(x)
#define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i)

template <typename T>
bool chmin(T &x, const T &y) {
    if (x > y) {
        x = y;
        return true;
    } else {
        return false;
    }
}
template <typename T>
bool chmax(T &x, const T &y) {
    if (x < y) {
        x = y;
        return true;
    } else {
        return false;
    }
}

constexpr i32 INF = 1001001001;
constexpr i64 INF64 = 3003003003003003003;

void findLocation(int n, int first, int location[], int stype[]) {
    Vec<Vec<i32>> dist(n, Vec<i32>(n, 0));
    REP(i, n) REP(j, i) {
        dist[i][j] = dist[j][i] = getDistance(i, j);
    }
    
    Vec<i32> mn(n, INF), mnrg(n, 0);
    REP(i, n) {
        REP(j, n) {
            if (i != j && chmin(mn[i], dist[i][j])) {
                mnrg[i] = j;
            }
        }
    }
    
    i32 y = mnrg[0];
    i32 x = mnrg[y];
    stype[x] = 1;
    location[x] = first + mn[0] - mn[y];
    stype[y] = 2;
    location[y] = first + mn[0];
    
    REP(i, n) {
        if (i == x || i == y) {
            continue;
        }
        if (dist[i][x] < dist[i][y]) {
            continue;
        }
        if (mnrg[i] != y && dist[i][mnrg[i]] + dist[mnrg[i]][y] == dist[i][y]) {
            continue;
        }
        stype[i] = 1;
        location[i] = location[y] - dist[i][y];
    }
    REP(i, n) {
        if (i == x || i == y) {
            continue;
        }
        if (dist[i][x] < dist[i][y]) {
            continue;
        }
        if (mnrg[i] != y && dist[i][mnrg[i]] + dist[mnrg[i]][y] == dist[i][y]) {
            stype[i] = 2;
            location[i] = location[mnrg[i]] + mn[i];
        }
    }
    REP(i, n) {
        if (i == x || i == y) {
            continue;
        }
        if (dist[i][x] > dist[i][y]) {
            continue;
        }
        if (mnrg[i] != x && dist[i][mnrg[i]] + dist[mnrg[i]][x] == dist[i][x]) {
            continue;
        }
        stype[i] = 2;
        location[i] = location[x] + dist[i][x];
    }
    REP(i, n) {
        if (i == x || i == y) {
            continue;
        }
        if (dist[i][x] > dist[i][y]) {
            continue;
        }
        if (mnrg[i] != x && dist[i][mnrg[i]] + dist[mnrg[i]][x] == dist[i][x]) {
            stype[i] = 1;
            location[i] = location[mnrg[i]] - mn[i];
        }
    }
}

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