Submission #766939

#	Time	Username	Problem	Language	Result	Execution time	Memory
766939		Nelt	Table Tennis (info1cup20_tabletennis)	C++17	49 / 100	61 ms	2904 KiB

tabletennis

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,avx2,fma")
 
#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 pp(a, b) pair<a, b>
#define pq(a) priority_queue<a>
#define qq(a) queue<a>
#define ss(a) set<a>
#define mm(a, b) map<a, b>
#define ump(a, b) unordered_map<a, b>
#define ANDROID                   \
    ios_base::sync_with_stdio(0); \
    cin.tie(0);                   \
    cout.tie(0);
#define elif else if
#define endl "\n"
#define allc(a) begin(a), end(a)
#define all(a) a, a + sizeof(a) / sizeof(a[0])
#define pb push_back
#define logi(a) __lg(a)
#define sqrt(a) sqrtl(a)
#define mpr make_pair
#define ins insert
using namespace std;
using namespace __gnu_pbds;
using namespace __cxx11;
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());
 
void solve()
{
    ll n, k;
    cin >> n >> k;
    ll a[n + k];
    for (ll &i : a)
        cin >> i;
    ll l, r, cnt, tot = 0;
    bool used[n + k];
    for (ll i = 0; i < n + k; i++)
    {
        ll j = i + n - 1;
        cnt = j - i + 1;
        tot = 1;
        l = i + 1, r = j - 1;
        bool ok = true;
        while (l < r)
        {
            if (a[l] + a[r] != a[i] + a[j]) ok = false;
            l++, r--;
        }
        if (ok)
        {
            for (ll m = i; m <= j; m++)
                cout << a[m] << " ";
            cout << endl;
            return;
        }
        
    }
    // assert(false);
}
/*
 
*/
int main()
{
    ANDROID
    // precomp();
    ll t = 1;
    // cin >> t;
    for (ll i = 1; i <= t; i++)
        // cout << "Case #" << i << ": ",
        solve();
    cerr << "\nTime elapsed : " << clock() * 1000.0 / CLOCKS_PER_SEC << " ms\n";
}

Compilation message (stderr)

tabletennis.cpp: In function 'void solve()':
tabletennis.cpp:52:14: warning: variable 'cnt' set but not used [-Wunused-but-set-variable]
   52 |     ll l, r, cnt, tot = 0;
      |              ^~~
tabletennis.cpp:52:19: warning: variable 'tot' set but not used [-Wunused-but-set-variable]
   52 |     ll l, r, cnt, tot = 0;
      |                   ^~~
tabletennis.cpp:53:10: warning: unused variable 'used' [-Wunused-variable]
   53 |     bool used[n + k];
      |          ^~~~

• Subtask 1: 11 / 11
• Subtask 2: 0 / 9
• Subtask 3: 14 / 14
• Subtask 4: 15 / 15
• Subtask 5: 9 / 9
• Subtask 6: 0 / 14
• Subtask 7: 0 / 15
• Subtask 8: 0 / 13