oj.uz

Submission #961295

# Submission time Handle Problem Language Result Execution time Memory
961295 2024-04-11T19:47:15 Z Prieved1 Longest Trip (IOI23_longesttrip) C++17
5 / 100
 33 ms 3928 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 and t[0].size()) {
      reverse(t[0].begin(), t[0].end());
    }
    if(rand()%2 and t[1].size()) {
      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 8 ms 344 KB Output is correct
2 Correct 8 ms 344 KB Output is correct
3 Correct 10 ms 600 KB Output is correct
4 Correct 17 ms 1268 KB Output is correct
5 Correct 31 ms 3440 KB Output is correct

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 9 ms 344 KB Output is correct
4 Correct 19 ms 1656 KB Output is correct
5 Correct 29 ms 3928 KB Output is correct
6 Incorrect 0 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 12 ms 596 KB Output is correct
4 Correct 18 ms 1368 KB Output is correct
5 Correct 28 ms 3632 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 10 ms 600 KB Output is correct
9 Correct 14 ms 1196 KB Output is correct
10 Correct 33 ms 3684 KB Output is correct
11 Correct 25 ms 3704 KB Output is correct
12 Correct 31 ms 3672 KB Output is correct
13 Correct 31 ms 3732 KB Output is correct
14 Correct 9 ms 344 KB Output is correct
15 Incorrect 3 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 6 ms 344 KB Output is correct
3 Correct 11 ms 596 KB Output is correct
4 Correct 17 ms 1388 KB Output is correct
5 Correct 27 ms 3700 KB Output is correct
6 Incorrect 1 ms 344 KB Incorrect
7 Halted 0 ms 0 KB -