oj.uz

Submission #961293

# Submission time Handle Problem Language Result Execution time Memory
961293 2024-04-11T19:46:10 Z Prieved1 Longest Trip (IOI23_longesttrip) C++17
5 / 100
 31 ms 4184 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
int cnt=0;
int n;
map<int, map<int,int>> mp;
bool query1(int a, int b) {
  if(mp[a][b]!=0)return mp[a][b]-1;
  int c=are_connected({a}, {b});
  mp[a][b]=c+1;
  mp[b][a]=c+1;
  cnt++;
  return c;
}
bool query2(int a, int b) {
 for(int j  = 0;j<n;j++) {
  if(a==j or j==b)continue;
  if(mp[a][j]==1 and mp[j][b]==1) {
    mp[a][b]=2;
    mp[b][a]=2;
    return 1;
  }
 }
 return query1(a,b);
}
vector<int> longest_trip(int N, int D)
{
  n=N;
  cnt=0;
  mp.clear();
  srand(time(NULL));
  vector<int> id(N);
  iota(id.begin(), id.end(), 0);
  random_shuffle(id.begin(), id.end());
  vector<int> t[2];
  t[0].push_back(id[0]);
  for(int ii = 1;ii<N;ii++) {
    int i=id[ii];
    if(t[1].size() > t[0].size())swap(t[0], t[1]);
    if(t[1].size()) {
      if(rand()%2)swap(t[0], t[1]);
    }
    if(rand()%2) {
      reverse(t[0].begin(), t[0].end());
    }
    if(rand()%2) {
      reverse(t[1].begin(), t[1].end());
    }
    int c=query2(t[0].back(), i);
    if(!c) {
      t[1].push_back(i);
    }
    else {
      t[0].push_back(i);
      if(t[1].size()) {
        c=query2(t[1].back(), i);
        if(c) {
          while(t[1].size()) {
            t[0].push_back(t[1].back());
            t[1].pop_back();
          }
        }
      }
    }
  }
  assert(cnt<=384);
  if(t[0].size()<t[1].size())swap(t[0], t[1]);
  return t[0];
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 8 ms 344 KB Output is correct
4 Correct 15 ms 1368 KB Output is correct
5 Correct 29 ms 3416 KB Output is correct

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 17 ms 1368 KB Output is correct
5 Correct 29 ms 3516 KB Output is correct
6 Incorrect 1 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 8 ms 500 KB Output is correct
3 Correct 10 ms 344 KB Output is correct
4 Correct 16 ms 1132 KB Output is correct
5 Correct 31 ms 3768 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 8 ms 344 KB Output is correct
8 Correct 9 ms 540 KB Output is correct
9 Correct 13 ms 856 KB Output is correct
10 Correct 27 ms 3552 KB Output is correct
11 Correct 28 ms 4184 KB Output is correct
12 Correct 25 ms 3712 KB Output is correct
13 Correct 30 ms 3688 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Incorrect 1 ms 344 KB Incorrect
16 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 10 ms 340 KB Output is correct
4 Correct 18 ms 1624 KB Output is correct
5 Correct 31 ms 3684 KB Output is correct
6 Incorrect 0 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -