oj.uz

Submission #842571

# Submission time Handle Problem Language Result Execution time Memory
842571 2023-09-03T04:03:29 Z irmuun Longest Trip (IOI23_longesttrip) C++17
15 / 100
 6 ms 600 KB 
#include<bits/stdc++.h>
#include "longesttrip.h"
 
using namespace std;
 
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
 
vector<int>longest_trip(int N, int D){
    vector<int>ans;
    if(D==3){
        vector<int>ans(N);
        iota(all(ans),0);
        return ans;
    }
    if(D==2){
        vector<int>ans;
        ans.pb(0);
        int l=0,r=0;
        int x;
        for(int i=1;i<N;i++){
            if(are_connected({0},{i})==true){
                ans.pb(i);
                x=i;
                r=i;
                break;
            }
        }
        for(int i=1;i<N;i++){
            if(i!=x){
                if(are_connected({l},{i})){
                    ans.insert(ans.begin(),i);
                    l=i;
                }
                else{
                    ans.pb(i);
                    r=i;
                }
            }
        }
        return ans;
    }
    vector<int>v,u;
    int l0=0,r0=0,l1=1,r1=1;
    v.pb(0);
    for(int i=1;i<N;i++){
        if(are_connected({i-1},{i})==true){
            v.pb(i);
        }
        else{
            l1=i;
            r1=i;
            u.pb(i);
            break;
        }
    }
    for(int i=l1+1;i<N;i++){
        if(are_connected({l0,r0},{i})==false){
            if(are_connected({l0},{i})==true){
                l0=i;
                v.insert(v.begin(),i);
            }
            else{
                v.pb(i);
                r0=i;
            }
        }
        else{
            if(are_connected({r0},{r1})==true){
                reverse(all(u));
                v.insert(v.end(),all(u));
                u.clear();
                u.pb(i);
                r0=v.back();
                l1=i;
                r1=i;
            }
            else{
                r1=i;
                u.pb(i);
            }
        }
    }
    if(v.size()>=u.size()){
        return v;
    }
    return u;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:23:17: warning: variable 'r' set but not used [-Wunused-but-set-variable]
   23 |         int l=0,r=0;
      |                 ^
longesttrip.cpp:34:13: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
   34 |             if(i!=x){
      |             ^~

Subtask #0
0.0 / 0.0

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

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 0 ms 344 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# 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 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 5 ms 600 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 4 ms 596 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 4 ms 600 KB Output is correct
11 Correct 4 ms 600 KB Output is correct
12 Correct 4 ms 344 KB Output is correct
13 Correct 6 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

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

Subtask #4
0.0 / 60.0

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