oj.uz

답안 #1061290

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1061290 2024-08-16T07:44:20 Z noyancanturk 가장 긴 여행 (IOI23_longesttrip) C++17
15 / 100
 8 ms 600 KB 
#include "longesttrip.h"

#include <bits/stdc++.h>
using namespace std;

#define pb push_back

int n,d;

vector<int>getslice(int l,int r,deque<int>&v){
  vector<int>res;
  for(int i=l;i<=r;i++){
    res.pb(v[i]);
  }
  return res;
}

vector<int>longest_trip(int N,int D){
  n=N,d=D;
  deque<int>trip1,trip2;
  trip1.pb(0);
  for(int i=1;i<n;i++){
    bool ok=are_connected({trip1.back()},{i});
    if(ok){
      trip1.pb(i);
    }else if(!trip2.size()){
      trip2.pb(i);
    }else{
      ok=are_connected({trip2.back()},{i});
      if(ok){
        trip2.pb(i);
      }else{
        while(trip2.size()){
          trip1.pb(trip2.back());
          trip2.pop_back();
        }
        trip2.pb(i);
      }
    }
  }
  if(!trip2.size())return vector<int>(trip1.begin(),trip1.end());
  if(!are_connected(vector<int>(trip1.begin(),trip1.end()),vector<int>(trip2.begin(),trip2.end()))){
    if(trip1.size()<trip2.size())swap(trip1,trip2);
    return vector<int>(trip1.begin(),trip1.end());
  }
  if(are_connected({trip1.front()},{trip2.front()})){
    vector<int>ans;
    for(int i=trip1.size()-1;0<=i;i--){
      ans.pb(trip1[i]);
    }
    for(int i:trip2){
      ans.pb(i);
    }
    return ans;
  }
  if(are_connected({trip1.back()},{trip2.front()})){
    vector<int>ans;
    for(int i:trip1){
      ans.pb(i);
    }
    for(int i:trip2){
      ans.pb(i);
    }
    return ans;
  }
  cerr<<"trip1 :: ";
  for(int i:trip1)cerr<<i<<" ";
  cerr<<"\n";
  cerr<<"trip2 :: ";
  for(int i:trip2)cerr<<i<<" ";
  cerr<<"\n";
  int ans1=-1;
  {
    int l=0,r=trip1.size()-1;
    while(l<=r){
      int mid=(l+r)>>1;
      bool ok=are_connected(getslice(l,mid,trip1),vector<int>(trip2.begin(),trip2.end()));
      if(ok){
        ans1=mid;
        r=mid-1;
      }else{
        l=mid+1;
      }
    }
  }
  assert(ans1!=-1);
  cerr<<trip1[ans1]<<" wowi\n";
  int ans2=-1;
  {
    int l=0,r=trip2.size()-1;
    while(l<=r){
      cerr<<"trying "<<l<<" "<<r<<"\n";
      int mid=(l+r)>>1;
      bool ok=are_connected(getslice(l,mid,trip2),{trip1[ans1]});
      if(ok){
        cerr<<l<<" "<<mid<<" set ans\n";
        ans2=mid;
        r=mid-1;
      }else{
        cerr<<"failed "<<l<<" "<<r<<" :: ";
        for(int i:getslice(l,mid,trip2))cerr<<i<<" ";
        cerr<<"\n";
        l=mid+1;
      }
    }
  }
  assert(ans2!=-1);
  cerr<<trip2[ans2]<<" wow\n";
  vector<int>ans;
  for(int i=ans1+1;i<trip1.size();i++){
    ans.pb(trip1[i]);
  }
  for(int i=0;i<=ans1;i++){
    ans.pb(trip1[i]);
  }
  ans.pb(trip2[ans2]);
  for(int i:trip2){
    if(i!=trip2[ans2])ans.pb(i);
  }
  assert(ans.size()==n);
  for(int i=0;i<n-1;i++){
    assert(are_connected({ans[i]},{ans[i+1]}));
  }
  return ans;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:110:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::deque<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  110 |   for(int i=ans1+1;i<trip1.size();i++){
      |                    ~^~~~~~~~~~~~~
In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from longesttrip.cpp:3:
longesttrip.cpp:120:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  120 |   assert(ans.size()==n);
      |          ~~~~~~~~~~^~~

Subtask #0
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 ms 344 KB Output is correct

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 7 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 5 ms 356 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 4 ms 348 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 5 ms 344 KB Output is correct
12 Correct 6 ms 344 KB Output is correct
13 Correct 6 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 6 ms 344 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 6 ms 344 KB Output is correct
8 Correct 7 ms 440 KB Output is correct
9 Correct 6 ms 436 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 5 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 5 ms 344 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 7 ms 340 KB Output is correct
16 Runtime error 2 ms 600 KB Execution killed with signal 6
17 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 5 ms 344 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 7 ms 436 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 7 ms 428 KB Output is correct
11 Correct 7 ms 344 KB Output is correct
12 Correct 7 ms 432 KB Output is correct
13 Correct 5 ms 344 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Runtime error 2 ms 344 KB Execution killed with signal 6
17 Halted 0 ms 0 KB -