Submission #715178

#	Time	Username	Problem	Language	Result	Execution time	Memory
715178		Nelt	Sirni (COCI17_sirni)	C++17	42 / 140	320 ms	786432 KiB

sirni

#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 F first
#define S second
#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 sync                      \
    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_64 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll sz = 1e5 + 5;
ll dsu[sz];
ll repr(ll x)
{
    if (dsu[x] < 0)
        return x;
    return dsu[x] = repr(dsu[x]);
}
bool Union(ll x, ll y)
{
    x = repr(x);
    y = repr(y);
    if (x == y)
        return false;
    if (dsu[x] < dsu[y])
        swap(dsu[x], dsu[y]);
    dsu[y] += dsu[x];
    dsu[x] = y;
    return true;
}
struct edge
{
    ll a, b, c;
};
void solve()
{
    ll n;
    cin >> n;
    for (ll i = 1; i <= n; i++)
        dsu[i] = -1;
    ll a[n + 1];
    for (ll i = 1; i <= n; i++)
        cin >> a[i];
    ll ans = 0;
    if (n == 1)
    {
        cout << "0\n";
        return;
    }
    edge e[n * (n - 1) / 2];
    ll ptr = 0;
    for (ll i = 1; i <= n; i++)
        for (ll j = i + 1; j <= n; j++)
            e[ptr++] = {i, j, min(a[j] % a[i], a[i] % a[j])};
    sort(all(e), 
    [](edge a, edge b)
    {
        return a.c < b.c;
    });
    for (ll i = 0; i < n * (n - 1) / 2; i++)
        if (Union(e[i].a, e[i].b))
            ans += e[i].c;
    cout << ans << endl;
}
/*

*/
int main()
{
    sync
        // 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";
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 14
• Subtask 6: 0 / 14
• Subtask 7: 0 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14