Submission #1089071

#	Time	Username	Problem	Language	Result	Execution time	Memory
1089071		efishel	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	0 ms	348 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vll = vector <ll>;
using ii = pair <ll, ll>;
using vii = vector <ii>;

int main () {
    cin.tie(nullptr) -> sync_with_stdio(false);
    ll n;
    cin >> n;
    vii ve(2*n);
    for (auto &[x, y] : ve) cin >> x >> y;
    ll ans = 0;
    auto fclamp = [&](ll l, ll r, ll &val) {
        if (val < l) { ans += l-val; val = l; }
        if (val > r) { ans += val-r; val = r; }
    };
    for (auto &[x, y] : ve) {
        fclamp(1, n, x);
        fclamp(1, 2, y);
    }
    vll asg(2*n);
    iota(asg.begin(), asg.end(), 0);
    auto cost = [&](ll pos, ll i) {
        auto [x, y] = ve[i];
        return abs(x-(1+pos%n)) + abs(y-(1+pos/n));
    };
    auto shsw = [&](ll i, ll j) {
        return cost(i, asg[j]) + cost(j, asg[i]) < cost(i, asg[i]) + cost(j, asg[j]);
    };
    for (ll k = 0; k < 2*n; k++) {
        for (ll i = 0; i < 2*n; i++) {
            for (ll j = 0; j < 2*n; j++) {
                if (shsw(i, j)) swap(asg[i], asg[j]);
            }
        }
    }
    for (ll i = 0; i < 2*n; i++) ans += cost(i, asg[i]);
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63