oj.uz

Submission #900603

# Submission time Handle Problem Language Result Execution time Memory
900603 2024-01-08T15:43:36 Z abcvuitunggio Longest Trip (IOI23_longesttrip) C++17
15 / 100
 9 ms 600 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
using namespace std;
int idx[300];
vector <int> longest_trip(int N, int D){
    vector <int> a,b;
    iota(idx,idx+N,0);
    shuffle(idx,idx+N,default_random_engine(chrono::steady_clock::now().time_since_epoch().count()));
    a.push_back(idx[0]);
    b.push_back(idx[1]);
    int ch=-1;
    for (int j=2;j<N;j++){
        int i=idx[j];
        if (are_connected({a.back()},{i})){
            a.push_back(i);
            ch=1;
            continue;
        }
        if (ch||are_connected({b.back()},{i})){
            b.push_back(i);
            ch=1;
            continue;
        }
        ch=0;
        reverse(b.begin(),b.end());
        for (int i:b)
            a.push_back(i);
        b={i};
    }
    if (a.size()<b.size())
        swap(a,b);
    if (!are_connected(a,b))
        return a;
    vector <int> x={0,a.size()-1},y={0,b.size()-1};
    for (int i:x)
        for (int j:y)
            if (are_connected({a[i]},{b[j]})){
                if (!i)
                    reverse(a.begin(),a.end());
                if (j)
                    reverse(b.begin(),b.end());
                for (int k:b)
                    a.push_back(k);
                return a;
            }
    int l=0,r=b.size()-1,i=-1;
    while (l<=r){
        int mid=(l+r)>>1;
        vector <int> tmp;
        for (int i=0;i<=mid;i++)
            tmp.push_back(b[i]);
        if (are_connected(a,tmp)){
            i=mid;
            r=mid-1;
        }
        else
            l=mid+1;
    }
    l=0,r=a.size()-1;
    int j=-1;
    while (l<=r){
        int mid=(l+r)>>1;
        vector <int> tmp;
        for (int i=0;i<=mid;i++)
            tmp.push_back(a[i]);
        if (are_connected(tmp,{b[i]})){
            j=mid;
            r=mid-1;
        }
        else
            l=mid+1;
    }
    vector <int> c;
    for (int k=(j+1)%a.size();c.size()<a.size();k=(k+1)%a.size())
        c.push_back(a[k]);
    for (int k=i;c.size()<a.size()+b.size();k=(k+1)%b.size())
        c.push_back(b[k]);
    return c;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:34:31: warning: narrowing conversion of '(a.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   34 |     vector <int> x={0,a.size()-1},y={0,b.size()-1};
      |                       ~~~~~~~~^~
longesttrip.cpp:34:31: warning: narrowing conversion of '(a.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
longesttrip.cpp:34:48: warning: narrowing conversion of '(b.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]
   34 |     vector <int> x={0,a.size()-1},y={0,b.size()-1};
      |                                        ~~~~~~~~^~
longesttrip.cpp:34:48: warning: narrowing conversion of '(b.std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'int' [-Wnarrowing]

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 1 ms 344 KB Incorrect
3 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 5 ms 340 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 5 ms 600 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 4 ms 596 KB Output is correct
6 Correct 8 ms 340 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 600 KB Output is correct
10 Correct 5 ms 344 KB Output is correct
11 Correct 5 ms 600 KB Output is correct
12 Correct 6 ms 344 KB Output is correct
13 Correct 4 ms 344 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 340 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 344 KB Output is correct
5 Correct 4 ms 600 KB Output is correct
6 Correct 7 ms 344 KB Output is correct
7 Correct 6 ms 596 KB Output is correct
8 Correct 5 ms 344 KB Output is correct
9 Correct 5 ms 344 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 6 ms 600 KB Output is correct
13 Correct 4 ms 596 KB Output is correct
14 Incorrect 0 ms 344 KB Incorrect
15 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 6 ms 600 KB Output is correct
6 Correct 7 ms 340 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 4 ms 344 KB Output is correct
9 Correct 4 ms 344 KB Output is correct
10 Correct 5 ms 600 KB Output is correct
11 Correct 4 ms 344 KB Output is correct
12 Correct 5 ms 344 KB Output is correct
13 Correct 4 ms 344 KB Output is correct
14 Incorrect 0 ms 344 KB Incorrect
15 Halted 0 ms 0 KB -