Submission #200137

#	Time	Username	Problem	Language	Result	Execution time	Memory
200137		johutha	Game (IOI13_game)	C++14	0 / 100	5 ms	504 KiB

game

#include "game.h"
#include <vector>
#include <iostream>
#include <cassert>
#include <memory>
#include <random>

#define int long long
#define seed 4134

using namespace std;

int gcd(int a, int b)
{
    if (a > b) swap(a, b);
    if (a == 0) return b;
    return gcd(b % a, a);
}

mt19937 rng(seed);
uniform_int_distribution<int> uni(0, 1e12);

struct node;

using node_ptr = shared_ptr<node>;

struct node
{
    node_ptr l, r;
    int x;
    int pos, lp, rp;
    int v;
    int cv;

    void recompute()
    {
        cv = v;
        lp = pos;
        rp = pos;
        if (l)
        {
            cv = gcd(cv, l->cv);
            lp = l->lp;
        }
        if (r)
        {
            cv = gcd(cv, r->cv);
            rp = r->rp;
        }
    }

    node(int k, int iv) : pos(k), v(iv)
    {
        x = uni(rng);
        recompute();
    }

    static node_ptr merge(node_ptr l, node_ptr r)
    {
        if (!l) return r;
        if (!r) return l;

        if (l->x > r->x)
        {
            l->r = merge(move(l->r), move(r));
            l->recompute();
            return l;
        }
        else
        {
            r->l = merge(move(l), move(r->l));
            r->recompute();
            return r;
        }
    }

    static pair<node_ptr, node_ptr> split(node_ptr rt, int pos)
    {
        if (!rt) return {};

        if (pos <= rt->pos)
        {
            node_ptr l;
            tie(l, rt->l) = split(move(rt->l), pos);
            if (l) l->recompute();
            if (rt) rt->recompute();
            return {move(l), move(rt)};
        }
        else
        {
            node_ptr r;
            tie(rt->r, r) = split(move(rt->r), pos);
            if (rt) rt->recompute();
            if (r) r->recompute();
            return {move(rt), move(r)};
        }
    }

    bool update(int k, int iv)
    {
        if (k == pos)
        {
            v = iv;
            recompute();
            return true;
        }
        if (l && k < pos) return l->update(k, iv);
        if (r && k > pos) return r->update(k, iv);
        recompute();
        return false;
    }

    static node_ptr insert(node_ptr rt, int k, int v)
    {
        node_ptr l, r, np;
        tie(l, r) = split(move(rt), k);
        np = make_shared<node>(k, v);
        l = merge(move(l), move(np));
        r = merge(move(l), move(r));
        return move(r);
    }

    int query(int ql, int qr)
    {
        if (ql <= lp && rp <= qr) return cv;
        if (rp < ql || qr < lp) return 0;
        int g = 0;
        if (ql <= pos && pos <= qr) g = v;
        if (l) g = gcd(g, l->query(ql, qr));
        if (r) g = gcd(g, r->query(ql, qr));
        return g;
    }

    void print(int in)
    {
        if (l) l->print(in + 1);
        for (int i = 0; i < in; i++) cout << "  ";
        cout << pos << " " << lp << " " << rp << "  " << v << " " << cv << "\n";
        if (r) r->print(in + 1);
    }
};

vector<node_ptr> sts;
int r, c;

void init(signed R, signed C)
{
    r = R;
    c = C;
    sts.resize(R);
}

void update(signed P, signed Q, int K)
{   
    if ((!sts[P]) || (!(sts[P]->update(Q, K))))
    {
        sts[P] = node::insert(move(sts[P]), Q, K);
    }
}
 
int calculate(signed P, signed Q, signed U, signed V) 
{
    return 0;
    // cout << "\n";
    if (U < P) swap(U, P);
    if (V < Q) swap(Q, V);
    
    int ret = 0;

    for (int i = P; i <= U; i++)
    {
        if (sts[i]) ret = gcd(ret, sts[i]->query(Q, V));
        // cout << i << " " << sts[i].query(Q, V, 0, c - 1, 0) << "\n";
    }

    return ret;
}

Compilation message (stderr)

grader.c: In function 'int main()':
grader.c:18:6: warning: variable 'res' set but not used [-Wunused-but-set-variable]
  int res;
      ^~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 26
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20