Submission #1255923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1255923		magikrap	World Map (IOI25_worldmap)	C++20	30 / 100	15 ms	2120 KiB

worldmap

#include <bits/stdc++.h>
#include "worldmap.h"
using namespace std;
using ll = long long;
#define MOD 998244353
#define MOD2 1000000007
#define vt vector
template <class T> using vvt = vt<vt<T>>;
template <class T> using vvvt = vt<vvt<T>>;
template <class T> using vvvvt = vt<vvvt<T>>;
typedef vt<int> vi;
typedef vvt<int> vvi;
typedef vvvt<int> vvvi;
typedef vvvvt<int> vvvvi;
typedef vt<ll> vl;
typedef vvt<ll> vvl;
typedef vvvt<ll> vvvl;
typedef vvvvt<ll> vvvvl;
#define endl '\n'
#define pb push_back
#define pf push_front
#define all(x) x.begin(),x.end()
#define sz(x) (int)((x).size())
#define mset multiset
#define fi first
#define se second
#define rep(i,a,b) for(int i=a;i<b;i++)
#define repl(i,a,b) for(ll i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define rrepl(i,a,b) for(ll i=a;i>=b;i--)
#define each(i,a) for(auto &i:a)
#define yesno(x) cout<<(x?"YES":"NO")<<endl
struct pii {
  int x, y;
  bool operator<(const pii &a) const { return x == a.x ? y < a.y : x < a.x; }
  bool operator>(const pii &a) const { return x == a.x ? y > a.y : x > a.x; }
  bool operator==(const pii &a) const { return x == a.x && y == a.y; }
  bool operator!=(const pii &a) const { return x != a.x || y != a.y; }
  pii operator+(const pii &a) const { return {x+a.x, y+a.y}; }
  pii operator-(const pii &a) const { return {x-a.x, y-a.y}; }
  pii operator*(const int &a) const { return {x*a, y*a}; }
  pii operator/(const int &a) const { return {x/a, y/a}; }
  void operator+=(const pii &a) { x += a.x; y += a.y; }
  void operator-=(const pii &a) { x -= a.x; y -= a.y; }
  void operator*=(const int &a) { x *= a; y *= a; }
  void operator/=(const int &a) { x /= a; y /= a; }
  friend ostream& operator<<(ostream &os, const pii &p) {return os << "(" << p.x << ", " << p.y << ")";}
  friend istream& operator>>(istream &is, pii &p) {return is >> p.x >> p.y;}
};
struct pll {
  ll x, y;
  bool operator<(const pll &a) const { return x == a.x ? y < a.y : x < a.x; }
  bool operator>(const pll &a) const { return x == a.x ? y > a.y : x > a.x; }
  bool operator==(const pll &a) const { return x == a.x && y == a.y; }
  bool operator!=(const pll &a) const { return x != a.x || y != a.y; }
  pll operator+(const pll &a) const { return {x+a.x, y+a.y}; }
  pll operator-(const pll &a) const { return {x-a.x, y-a.y}; }
  pll operator*(const ll &a) const { return {x*a, y*a}; }
  pll operator/(const ll &a) const { return {x/a, y/a}; }
  void operator+=(const pll &a) { x += a.x; y += a.y; }
  void operator-=(const pll &a) { x -= a.x; y -= a.y; }
  void operator*=(const ll &a) { x *= a; y *= a; }
  void operator/=(const ll &a) { x /= a; y /= a; }
  friend ostream& operator<<(ostream &os, const pll &p) {return os << "(" << p.x << ", " << p.y << ")";}
  friend istream& operator>>(istream &is, pll &p) {return is >> p.x >> p.y;}
};
static uint64_t splitmix64(uint64_t x) {
  x += 0x9e3779b97f4a7c15;
  x = (x^(x>>30))*0xbf58476d1ce4e5b9;
  x = (x^(x>>27))*0x94d049bb133111eb;
  return x^(x>>31);
}
struct custom_hash {
  static const uint64_t FIXED_RANDOM;
  size_t operator()(uint64_t x) const {return splitmix64(x + FIXED_RANDOM);}
  template<typename T> size_t operator()(const T& t) const {return splitmix64(uint64_t(std::hash<T>{}(t)) + FIXED_RANDOM);}
};
const uint64_t custom_hash::FIXED_RANDOM = chrono::steady_clock::now().time_since_epoch().count();
mt19937 rng(custom_hash::FIXED_RANDOM);
template<typename K, typename V> using umap = unordered_map<K, V, custom_hash>;
template<typename K> using uset = unordered_set<K, custom_hash>;
template<typename T> using umset = unordered_multiset<T, custom_hash>;
template<class T> bool ckmin(T& a, const T& b) {
  return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) {
  return a < b ? a = b, 1 : 0; }

void dfs(vvi &adj, int u, int p, vi &ans) {
  ans.pb(u);
  each(v,adj[u]) {
    if (v == p) continue;
    dfs(adj, v, u, ans);
    ans.pb(u);
  }
}

vvi create_map(int N, int M, vi A, vi B) {
  if (M == N-1) {
    vvi adj(N+1);
    for (int i = 0; i < M; ++i) {
      adj[A[i]].pb(B[i]);
      adj[B[i]].pb(A[i]);
    }
    vi ans;
    dfs(adj, 1, 0, ans);
    vvi res(sz(ans), vi(sz(ans), 0));
    rep(i,0,sz(ans)) {
      rep(j,0,sz(ans)) {
        res[i][j] = ans[j];
      }
    }
    return res;
  } else {
    vvi ans(2*N, vi(2*N, 1));
    vt<pii> hm;
    rep(i,2,N+1) {
      hm.pb({i,i});
    }
    rep(i,0,M) {
      hm.pb({A[i], B[i]});
    }
    rep(i,0,sz(ans)/2) {
      rep(j,0,sz(ans)) {
        if ((i+j)%2==0 && sz(hm)) {
          ans[2*i][j] = hm.back().x;
          ans[2*i+1][j] = hm.back().y;
          hm.pop_back();
        }
      }
    }
    return ans;
  }
}

• Subtask 0: 0 / 0
• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 7 / 7
• Subtask 4: 8 / 8
• Subtask 5: 0 / 14
• Subtask 6: 0 / 56