Submission #1059525

#	Time	Username	Problem	Language	Result	Execution time	Memory
1059525		Thanhs	Lampice (COCI21_lampice)	C++14	50 / 50	1 ms	452 KiB

Main

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define int long long
// #define double long double
 
#define endl '\n'
#define fastIO ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
#define setmin(x, y) x = min((x), (y))
#define setmax(x, y) x = max((x), (y))
#define sqr(x) ((x) * (x))
#define fi first
#define se second
#define all(x) x.begin(), x.end()
 
// mt19937 hdp(chrono::high_resolution_clock::now().time_since_epoch().count());
// int rand(int l, int r){return l + ((hdp() % (r - l + 1)) + r - l + 1) % (r - l + 1);}

const int NM = 50 + 5;
const int LM = 1e4 + 5;
const int mod = 1e9 + 7;

int n, k, a[NM];

bool check(int l, int r)
{
    int len = r - l + 1;
    for (int i = 1, j = l; i <= k; i++, j += len)
        for (int o = 0; o < len; o++)
            if (j + o > n || a[j + o] != a[l + o])
                return false;
    return true;
}

void solve()
{
    cin >> n >> k;
    for (int i = 1; i <= n; i++)
        cin >> a[i];
    for (int l = 1; l <= n; l++)
        for (int r = l; r <= n; r++)
            if (check(l, r))
            {
                cout << r - l + 1 << endl;
                for (int i = l; i <= r; i++)
                    cout << a[i] << ' ';
                return;
            }
    cout << -1;
}

signed main()
{
    fastIO
    if (fopen("in.txt", "r")) 
    {
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    }
    int tc = 1;
    // cin >> tc;
    while (tc--)
        solve();
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:58:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |         freopen("in.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:59:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |         freopen("out.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 25 / 25