oj.uz

Submission #958061

# Submission time Handle Problem Language Result Execution time Memory
958061 2024-04-04T20:07:31 Z Nelt Longest Trip (IOI23_longesttrip) C++17
15 / 100
 767 ms 2372 KB 
#include "longesttrip.h"
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,avx2,fma,popcnt")

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

/* DEFINES */
#define S second
#define F first
#define ll long long
#define ull unsigned long long
#define ld long double
#define npos ULLONG_MAX
#define INF LLONG_MAX
#define vv(a) vector<a>
#define ss(a) set<a>
#define pp(a, b) pair<a, b>
#define mm(a, b) map<a, b>
#define qq(a) queue<a>
#define pq(a) priority_queue<a>
#define ump(a, b) unordered_map<a, b>
#define ANDROID                   \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);
#define allc(a) begin(a), end(a)
#define all(a) a, a + sizeof(a) / sizeof(a[0])
#define elif else if
#define endl "\n"
#define pb push_back
#define ins insert
#define logi __lg
#define sqrt sqrtl
#define mpr make_pair
using namespace std;
using namespace __cxx11;
using namespace __gnu_pbds;
typedef char chr;
typedef basic_string<chr> str;
template <typename T, typename key = less<T>>
using ordered_set = tree<T, null_type, key, rb_tree_tag, tree_order_statistics_node_update>;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll N = 256;
vv(ll) g[N];
bool mat[N][N];
std::vector<int> longest_trip(int n, int d)
{
    for (ll i = 0; i < n; i++)
        for (ll j = 0; j < n; j++)
            mat[i][j] = 0;
    for (ll i = 0; i < n; i++)
        g[i].clear();
    vv(int) ans;
    if (d == 3)
    {
        for (ll i = 0; i < n; i++)
            ans.pb(i);
        return ans;
    }
    if (d == 2)
    {
        for (int i = 0; i < n; i++)
            for (int j = i + 1; j < n; j++)
                if (are_connected({i}, {j}))
                    g[i].pb(j), g[j].pb(i), mat[i][j] = mat[j][i] = true;
        vector<int> ans;
        ll found = 0;
        for (ll i = 0; i + 1 < n; i++)
            if (mat[i][i + 1])
            {
                ans.push_back(i), ans.push_back(i + 1), found = i;
                break;
            }
        for (ll i = 0; i < n; i++)
            if (i != found and i != found + 1)
            {
                if (mat[ans.front()][i])
                    ans.insert(ans.begin(), i);
                else
                    ans.push_back(i);
            }
        return ans;
    }
    vector<int> comp, comp1;
    ll p[n];
    iota(p, p + n, 0);
    // shuffle(p, p + n, rng);
    for (int i : p)
        if (comp1.empty())
        {
            if (comp.empty())
            {
                comp = {i};
                continue;
            }
            if (!are_connected({comp.back()}, {i}))
                comp1 = {i};
            else
                comp.push_back(i);
        }
        else
        {
            bool ok = are_connected({comp.back()}, {i});
            if (ok)
            {
                bool ok1 = are_connected({comp1.back()}, {i});
                if (ok1)
                {
                    comp.push_back(i);
                    for (ll j : comp1)
                        comp.push_back(j);
                    comp1.clear();
                }
                else
                    comp.push_back(i);
            }
            else
                comp1.push_back(i);
        }
    // cout << "OK";
    if (comp1.empty())
        return comp;
    if (comp.size() > comp1.size())
        swap(comp, comp1);
    if (!are_connected(comp, comp1))
        return comp1;
    if (comp.size() >= 3)
    {
        bool ok = are_connected({comp.front()}, {comp.back()});
        if (!ok)
        {
            ans = comp;
            if (!are_connected({comp.back()}, {comp1.front()}))
                reverse(ans.begin(), ans.end());
            for (ll i : comp1)
                ans.push_back(i);
            return ans;
        }
        swap(comp, comp1);
        ok = are_connected({comp.front()}, {comp.back()});
        if (!ok)
        {
            ans = comp;
            if (!are_connected({comp.back()}, {comp1.front()}))
                reverse(ans.begin(), ans.end());
            for (ll i : comp1)
                ans.push_back(i);
            return ans;
        }
        swap(comp, comp1);
    }
    ll l = 0, r = comp.size() - 1;
    int first = comp.size() - 1;
    vector<int> tmp;
    while (l <= r)
    {
        tmp.clear();
        ll mid = (l + r) >> 1;
        for (ll i = 0; i <= mid; i++)
            tmp.push_back(comp[i]);
        if (are_connected(tmp, comp1))
            r = mid - 1, first = mid;
        else
            l = mid + 1;
    }
    l = 0, r = comp1.size() - 1;
    int second = comp1.size() - 1;
    while (l <= r)
    {
        tmp.clear();
        ll mid = (l + r) >> 1;
        for (ll i = 0; i <= mid; i++)
            tmp.push_back(comp1[i]);
        if (are_connected({comp[first]}, tmp))
            r = mid - 1, second = mid;
        else
            l = mid + 1;
    }
    for (ll i = first + comp.size() - 1; i >= first; i--)
        ans.push_back(comp[i % comp.size()]);
    for (ll i = second; i < second + comp1.size(); i++)
        ans.push_back(comp1[i % comp1.size()]);
    return ans;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:183:27: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  183 |     for (ll i = second; i < second + comp1.size(); i++)
      |                         ~~^~~~~~~~~~~~~~~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Incorrect 2 ms 668 KB Incorrect
3 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 1 ms 596 KB Output is correct
4 Correct 1 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 9 ms 344 KB Output is correct
2 Correct 23 ms 344 KB Output is correct
3 Correct 120 ms 1112 KB Output is correct
4 Correct 361 ms 1908 KB Output is correct
5 Correct 724 ms 1632 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 24 ms 344 KB Output is correct
8 Correct 114 ms 600 KB Output is correct
9 Correct 261 ms 1124 KB Output is correct
10 Correct 734 ms 1864 KB Output is correct
11 Correct 736 ms 2372 KB Output is correct
12 Correct 758 ms 1820 KB Output is correct
13 Correct 767 ms 1920 KB Output is correct

Subtask #3
0.0 / 25.0

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

Subtask #4
0.0 / 60.0

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