Submission #1198904

#	Time	Username	Problem	Language	Result	Execution time	Memory
1198904		rxlfd314	Game (APIO22_game)	C++20	2 / 100	9 ms	14484 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ari2 = array<int, 2>;
using ari3 = array<int, 3>;
using arl2 = array<ll, 2>;
using arl3 = array<ll, 3>;
template <class T> using vt = vector<T>;
#define all(x) begin(x), end(x)
#define size(x) (int((x).size()))
#define REP(a,b,c,d) for(int a=(b);(d)>0?a<=(c):a>=(c);a+=(d))
#define FOR(a,b,c) REP(a,b,c,1)
#define ROF(a,b,c) REP(a,b,c,-1)

constexpr int mxN = 300005;
int N, K, A[mxN], B[mxN];
vt<int> adj[mxN], radj[mxN];

void init(int n, int k) {
  N = n, K = k;
  fill(A, A + N, -1);
  fill(B, B + N, N);
}

int dfs1(const int i) {
  if (A[i] >= B[i])
    return 1;
  for (const auto &j : adj[i]) {
    if (A[i] <= A[j])
      continue;
    A[j] = A[i];
    if (dfs1(j))
      return 1;
  }
  return 0;
}

int dfs2(const int i) {
  if (A[i] >= B[i])
    return 1;
  for (const auto &j : radj[i]) {
    if (B[i] >= B[j])
      continue;
    B[j] = B[i];
    if (dfs2(j))
      return 1;
  }
  return 0;
}

int add_teleporter(int u, int v) {
  if (u < K && v < K)
    return u >= v;
  if (u < K) {
    if (A[v] >= u)
      return 0;
    A[v] = u;
    return dfs1(v);
  }
  if (v < K) {
    if (B[u] <= v)
      return 0;
    B[u] = v;
    return dfs2(v);
  }
  if (u == v)
    return 0;
  adj[u].push_back(v);
  radj[v].push_back(u);
  return dfs1(u) || dfs2(v);
}

• Subtask 1: 2 / 2
• Subtask 2: 0 / 10
• Subtask 3: 0 / 18
• Subtask 4: 0 / 30
• Subtask 5: 0 / 40