Submission #965963

#	Time	Username	Problem	Language	Result	Execution time	Memory
965963		phoenix0423	Fun Tour (APIO20_fun)	C++17	26 / 100	86 ms	1512 KiB

fun

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define fastio ios::sync_with_stdio(false), cin.tie(0)
#pragma GCC optimize("Ofast")
#define pb push_back
#define eb emplace_back
#define f first
#define s second
#define q1 hoursRequired
#define q2 attrationsBehind
#include "fun.h"
const int maxn = 500 + 5;
const int INF = 1e9;
vector<int> adj[maxn];
int dist[maxn][maxn];

void dfs(int pos, int prev, int h, int d){
  dist[h][pos] = d;
  for(auto x : adj[pos]){
    if(x == prev) continue;
    dfs(x, pos, h, d + 1);
  }
}
vector<int> sol1(int n){
  for(int i = 0; i < n; i++){
    for(int j = i + 1; j < n; j++){
      if(q1(i, j) == 1){
        adj[i].pb(j), adj[j].pb(i);
      }
    }
  }
  for(int i = 0; i < n; i++) dfs(i, -1, i, 0);
  for(int i = 0; i < n; i++){
    vector<int> ans;
    vector<int> use(n);
    ans.pb(i);
    use[i] = 1;
    int mx = -1, lst = INF, prv = i;
    while(ans.size() < n){
      mx = -1;
      for(int j = 0; j < n; j++){
        if(use[j]) continue;
        if(dist[prv][j] <= lst){
          if(mx == -1 || dist[prv][j] > dist[prv][mx]) mx = j;
        }
      }
      if(mx == -1) break;
      assert(!use[mx]);
      use[mx] = 1, ans.pb(mx);
      lst = dist[prv][mx];
      prv = mx;
    }
    if(ans.size() == n) return ans;
  }
  assert(false);
}

std::vector<int> createFunTour(int n, int Q) {
  if(n <= 500) return sol1(n);
}

Compilation message (stderr)

fun.cpp: In function 'std::vector<int> sol1(int)':
fun.cpp:41:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   41 |     while(ans.size() < n){
      |           ~~~~~~~~~~~^~~
fun.cpp:55:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   55 |     if(ans.size() == n) return ans;
      |        ~~~~~~~~~~~^~~~
fun.cpp: In function 'std::vector<int> createFunTour(int, int)':
fun.cpp:62:1: warning: control reaches end of non-void function [-Wreturn-type]
   62 | }
      | ^

• Subtask 1: 10 / 10
• Subtask 2: 16 / 16
• Subtask 3: 0 / 21
• Subtask 4: 0 / 19
• Subtask 5: 0 / 34