Submission #1084732

#	Time	Username	Problem	Language	Result	Execution time	Memory
1084732		DaciejMaciej	Sirni (COCI17_sirni)	C++17	84 / 140	862 ms	786432 KiB

sirni

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

using namespace std;
// using namespace __gnu_pbds;

typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef long double ld;

template <class T>

using VV = vector<vector<T>>;

using VI = vector<int>;
using VVI = vector<vector<int>>;

using VL = vector<long long>;
using VVL = vector<vector<long long>>;

using VC = vector<char>;
using VVC = vector<vector<char>>;

using VB = vector<bool>;
using VVB = vector<vector<bool>>;

using VD = vector<double>;
using VVD = vector<vector<double>>;

using PII = pair<int, int>;
using PLL = pair<long long, long long>;
using PIL = pair<int, long long>;
using PLI = pair<long long, int>;

using VPII = vector<pair<int, int>>;
using VPLL = vector<pair<long long, long long>>;

#define LINE '\n'
#define SPACE ' '
#define PB push_back
#define FOR(i, a, b) for (int i = (a); i < (int(b)); i++)
#define FORE(i, a, b) for (int i = (a); i <= (int)((b)); i++)
#define ALL(x) x.begin(), x.end()
#define RALL(x) x.rbegin(), x.rend()
#define sq(a) ((a) * (a))
#define sz(x) ((int)s.size())

// zero indexed
template <class T>
struct segtree
{
    const T def = 0;
    int n;
    vector<T> seg;

    segtree(int _size) : n(_size), seg(2 * _size, def) {}

    T merge(T a, T b)
    {
        return max(a, b);
    }
    void update(int pos, T val)
    {
        for (seg[pos += n] = val; pos /= 2;)
        {
            seg[pos] = merge(seg[pos * 2], seg[pos * 2 + 1]);
        }
    }
    T query(int l, int r)
    { // get [l, r]
        T a = def, b = def;
        for (l += n, r += n + 1; l < r; l /= 2, r /= 2)
        {
            if (l % 2)
                a = merge(a, seg[l++]);
            if (r % 2)
                b = merge(b, seg[--r]);
        }
        return merge(a, b);
    }
};

const ll MOD = 1e9 + 7;

template <class T>
void maxi(T &a, T b)
{
    a = max(a, b);
}

template <class T>
void mini(T &a, T b)
{
    a = min(a, b);
}

template <class T>
void addi(T &a, T b)
{
    a = (a + b) % MOD;
}

template <class T>
void subi(T &a, T b)
{
    a = (a - b + MOD) % MOD;
}

template <class T>
T add(T a, T b)
{
    return (a + b) % MOD;
}

template <class T>
T sub(T a, T b)
{
    return (a - b + MOD) % MOD;
}

template <class T>
T mul(T a, T b)
{
    return ((a % MOD) * (b % MOD)) % MOD;
}

ll binpow(ll a, ll b, ll mod)
{
    ll res = 1;
    while (b > 0)
    {
        if (b & 1)
        {
            res = (res * a) % mod;
        }
        a = (a * a) % mod;
        b >>= 1;
    }

    return res;
}

struct DSU
{

    VI par;
    VI size;
    DSU(int _n) : par(_n), size(_n, 1)
    {
        iota(ALL(par), 0);
    }

    bool merge(int x, int y)
    {
        x = find(x);
        y = find(y);

        if (x == y)
            return false;
        if (size[y] > size[x])
            swap(x, y);
        size[x] += size[y];
        par[y] = x;
        return true;
    }

    int find(int x)
    {
        return (par[x] == x ? x : par[x] = find(par[x]));
    }

    bool connected(int x, int y)
    {
        return find(x) == find(y);
    }

    void reset()
    {
        FOR(i, 0, par.size())
        par[i] = i,
        size[i] = 1;
    }
};

const int INF = 1e9;
const int MAX_N = 1e3 + 4;

const ll LG = 1e8;

void solve()
{
    int n;
    cin >> n;

    VI p(n);
    FOR(i, 0, n)
    {
        cin >> p[i];
    }

    sort(ALL(p));
    p.erase(unique(ALL(p)), p.end());
    n = p.size();

    int mx = p.back();
    VI next(mx + 1, -1);
    FOR(i, 0, n)
    {
        next[p[i]] = i;
    }

    for (int i = mx - 1; i >= 0; i--)
    {
        if (next[i] == -1)
        {
            next[i] = next[i + 1];
        }
    }

    VPLL g;

    FOR(i, 0, n - 1)
    {
        g.PB({p[i+1]%p[i], ll(i+1) * LG + i + 2});
        for (int at = 2 * p[i]; at <= mx; at += p[i])
        {
            int tmp = next[at];
            g.PB({p[tmp] % p[i], ll(i+1) * LG + tmp + 1});
        }
    }

    DSU dsu(n + 3);
    sort(ALL(g));
    int ans = 0;
    for(auto [cost, code] : g) {
        int a = code / LG;
        int b = code % LG;
        assert(a < n + 3 & a >= 0);
        assert(b < n + 3 & a >= 0);

        //cerr << a << SPACE << b << LINE;
        if(dsu.merge(a, b)) ans += cost;
    }

    cout << ans << LINE;
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int t = 1;
    // cin >> t;

    while (t--)
        solve();
}

Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from sirni.cpp:1:
sirni.cpp: In function 'void solve()':
sirni.cpp:241:18: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  241 |         assert(a < n + 3 & a >= 0);
      |                ~~^~~~~~~
sirni.cpp:242:18: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
  242 |         assert(b < n + 3 & a >= 0);
      |                ~~^~~~~~~

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