제출 #1032272

#제출 시각아이디문제언어결과실행 시간메모리
1032272Tonyl즐거운 행로 (APIO20_fun)C++17
26 / 100
233 ms524288 KiB
#include "fun.h"
#include <bits/stdc++.h>
using namespace std;
using vi = vector<int>;
using pi = pair<int,int>;
using ll = long long;
#define REP(i,n) for (int i = 0; i < n; i++)
#define trav(a,x) for (auto &a : x)
#define all(x) (x).begin(), (x).end()
#define D(x) cerr << #x << ": " << x << endl;

map<pi, int> dists;
int ask_dist(int a, int b) {
  if (a > b) swap(a,b);
  if (!dists.count({a,b})) dists[{a,b}] = hoursRequired(a,b);
  return dists[{a,b}];
}
//attractionsBehind

int n, q;

std::vector<int> createFunTour(int N, int Q) {
  n = N; q = Q;
  vector<pair<int,pi>> alld(n*n);
  REP(i,n) {
    REP(j,n) alld[i*n+j] = {ask_dist(i,j), {i,j}};
  }
  sort(all(alld));

  vector<bool> done(n, 0);
  int s = alld.back().second.first;
  vi ans = {s};
  done[s] = 1;
  D(s);

  while (--n) {
    int best = s;
    REP(i,N) {
      if (done[i]) continue;
      if (ask_dist(s, best) < ask_dist(s, i)) best = i;
    }
    assert(s != best);
    s = best;
    //D(s);
    done[s] = 1;
    ans.push_back(s);
  }

  return ans;
}
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