Submission #127219

#	Time	Username	Problem	Language	Result	Execution time	Memory
127219		RockyB	Coin Collecting (JOI19_ho_t4)	C++17	0 / 100	2 ms	376 KiB

joi2019_ho_t4

/// In The Name Of God

//#pragma GCC optimize("Ofast")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
//#pragma GCC optimize("unroll-loops")

#include <bits/stdc++.h>

#define f first
#define s second

#define pb push_back
#define pp pop_back
#define mp make_pair

#define sz(x) (int)x.size()
#define sqr(x) ((x) * 1ll * (x))
#define all(x) x.begin(), x.end()

#define rep(i, l, r) for (int i = (l); i <= (r); i++)
#define per(i, l, r) for (int i = (l); i >= (r); i--)

#define Kazakhstan ios_base :: sync_with_stdio(0), cin.tie(0), cout.tie(0);

#define nl '\n'
#define ioi exit(0);

typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;

const int N = (int)2e5 + 7;
const int inf = (int)1e9 + 7;
const int mod = (int)1e9 + 7;
const ll linf = (ll)1e18 + 7;

const int dx[] = {-1, 0, 1, 0, 1, -1, -1, 1};
const int dy[] = {0, 1, 0, -1, 1, -1, 1, -1};

using namespace std;

int n;
pair <ll, ll> a[N << 1];

ll dst(pair <ll, ll> x, pair <ll, ll> y) {
  return abs(x.f - y.f) + abs(x.s - y.s);
}

int cnt[N][3];


ll go1(int x, int y) {
  ll mn = linf;
  pair <int, int> go = {-1, -1};
  rep(j, 1, 2) {
    rep(i, 1, n) {
      if (!cnt[i][j]) {
        ll cur = dst({x, y}, {i, j});
        if (cur < mn) {
          mn = cur;
          go = {i, j};
        }
      }
    }
  }
  cnt[go.f][go.s]++;
  return mn;
}
ll go2(int x, int y) {
  ll mn = linf;
  pair <int, int> go = {-1, -1};
  per(j, 2, 1) {
    rep(i, 1, n) {
      if (!cnt[i][j]) {
        ll cur = dst({x, y}, {i, j});
        if (cur < mn) {
          mn = cur;
          go = {i, j};
        }
      }
    }
  }
  cnt[go.f][go.s]++;
  return mn;
}
ll fnd(int x, int y) {
  ll mn = linf;
  pair <int, int> go = {-1, -1};
  rep(i, 1, n) {
    rep(j, 1, 2) {
      if (cnt[i][j] > 1) {
        ll cur = dst({i, j}, {x, y});
        if (cur < mn) {
          mn = cur;
          go = {i, j};
        }
      }
    }
  }
  cnt[go.f][go.s]--;
  return mn;
}
int main() {
	#ifdef IOI
		freopen ("in.txt", "r", stdin);
    freopen ("D.out", "w", stdout);
	#endif
  Kazakhstan
  cin >> n;
  rep(i, 1, n << 1) {
    cin >> a[i].f >> a[i].s;
  }
  sort (a + 1, a + n + n + 1);
  ll ans = 0;
  rep(i, 1, n << 1) {
    ll mn = linf;
    pair <int, int> go = {-1, -1};
    rep(x, 1, n) {
      rep(y, 1, 2) {
        ll cur = dst(a[i], {x, y});
        if (cur < mn) {
          mn = cur;
          go = {x, y};
        }
      }
    }
    ans += mn;
    cnt[go.f][go.s]++;
    // cerr << a[i].f << ' ' << a[i].s << " -> " << go.f << ' ' << go.s << nl;
  }

  /* per(j, 2, 1) {
    rep(i, 1, n) {
      cerr << cnt[i][j] << ' ';
    }
    cerr << nl;
  } */
  // cerr << ans << nl;
  rep(i, 1, n) {
    rep(j, 1, 2) {
      if (!cnt[i][j]) {
        ans += fnd(i, j);
        cnt[i][j] = 1;
      }
    }
  }

  cout << ans;
	ioi
}

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