Submission #261110

#	Time	Username	Problem	Language	Result	Execution time	Memory
261110		SamAnd	Game (IOI13_game)	C++17	80 / 100	9308 ms	256000 KiB

game

#include "game.h"
#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define fi first
#define se second
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(),(x).end()
typedef long long ll;
const int T = 22003 * 30 * 30;

long long gcd(long long X, long long Y) {
    long long tmp;
    while (X != Y && Y != 0) {
        tmp = X;
        X = Y;
        Y = tmp % Y;
    }
    return X;
}

int R, C;

map<pair<int, int>, ll> mp;

int zy;
int uly[T / 4 * 3], ury[T / 4 * 3];
ll g[T / 4 * 3];

int zx;
int uy[T / 30];
int ulx[T / 30], urx[T / 30];

void ubdy(int tlx, int trx, int tly, int try_, int x, int y, ll k, int posyl, int posyr, int posy)
{
    if (trx - tlx + 1 <= 3 && try_ - tly + 1 <= 3)
    {
        g[posy] = 0;
        for (int i = tlx; i <= trx; ++i)
        {
            for (int j = tly; j <= try_; ++j)
            {
                if (mp.find(m_p(i, j)) != mp.end())
                    g[posy] = gcd(g[posy], mp[m_p(i, j)]);
            }
        }
        return;
    }
    if (tly == try_)
    {
        if (tlx == trx)
        {
            g[posy] = k;
            return;
        }
        g[posy] = 0;
        int m = (tlx + trx) / 2;
        if (m - tlx + 1 <= 3)
        {
            for (int i = tlx; i <= m; ++i)
            {
                if (mp.find(m_p(i, tly)) != mp.end())
                    g[posy] = gcd(g[posy], mp[m_p(i, tly)]);
            }
        }
        else
            g[posy] = gcd(g[posy], g[posyl]);
        if (trx - m <= 3)
        {
            for (int i = m + 1; i <= trx; ++i)
            {
                if (mp.find(m_p(i, tly)) != mp.end())
                    g[posy] = gcd(g[posy], mp[m_p(i, tly)]);
            }
        }
        else
            g[posy] = gcd(g[posy], g[posyr]);
        return;
    }
    int m = (tly + try_) / 2;
    if (y <= m)
    {
        if (!uly[posy])
            uly[posy] = ++zy;
        ubdy(tlx, trx, tly, m, x, y, k, uly[posyl], uly[posyr], uly[posy]);
    }
    else
    {
        if (!ury[posy])
            ury[posy] = ++zy;
        ubdy(tlx, trx, m + 1, try_, x, y, k, ury[posyl], ury[posyr], ury[posy]);
    }
    g[posy] = gcd(g[uly[posy]], g[ury[posy]]);
}

void ubdx(int tlx, int trx, int x, int y, ll k, int posx)
{
    if (tlx == trx)
    {
        if (!uy[posx])
            uy[posx] = ++zy;
        ubdy(tlx, trx, 0, C - 1, x, y, k, 0, 0, uy[posx]);
        return;
    }
    int m = (tlx + trx) / 2;
    if (x <= m)
    {
        if (!ulx[posx])
            ulx[posx] = ++zx;
        ubdx(tlx, m, x, y, k, ulx[posx]);
    }
    else
    {
        if (!urx[posx])
            urx[posx] = ++zx;
        ubdx(m + 1, trx, x, y, k, urx[posx]);
    }
    if (!uy[posx])
        uy[posx] = ++zy;
    ubdy(tlx, trx, 0, C - 1, x, y, k, uy[ulx[posx]], uy[urx[posx]], uy[posx]);
}

ll qryy(int tlx, int trx, int tly, int try_, int ly, int ry, int posy)
{
    if (ly > ry)
        return 0;
    //if (posy == 0)
    //    return 0;
    if (tly == ly && try_ == ry)
    {
        if (trx - tlx + 1 <= 3 && try_ - tly + 1 <= 3)
        {
            ll g = 0;
            for (int i = tlx; i <= trx; ++i)
            {
                for (int j = tly; j <= try_; ++j)
                {
                    if (mp.find(m_p(i, j)) != mp.end())
                        g = gcd(g, mp[m_p(i, j)]);
                }
            }
            return g;
        }
        return g[posy];
    }
    int m = (tly + try_) / 2;
    return gcd(qryy(tlx, trx, tly, m, ly, min(m, ry), uly[posy]),
               qryy(tlx, trx, m + 1, try_, max(m + 1, ly), ry, ury[posy]));
}

ll qryx(int tlx, int trx, int lx, int rx, int ly, int ry, int posx)
{
    if (lx > rx)
        return 0;
    if (posx == 0)
        return 0;
    if (tlx == lx && trx == rx)
    {
        return qryy(tlx, trx, 0, C - 1, ly, ry, uy[posx]);
    }
    int m = (tlx + trx) / 2;
    return gcd(qryx(tlx, m, lx, min(m, rx), ly, ry, ulx[posx]),
               qryx(m + 1, trx, max(m + 1, lx), rx, ly, ry, urx[posx]));
}

void init(int R, int C)
{
    ::R = R;
    ::C = C;
    ++zx;
}

void update(int P, int Q, long long K)
{
    mp[m_p(P, Q)] = K;
    ubdx(0, R - 1, P, Q, K, 1);
}

long long calculate(int P, int Q, int U, int V)
{
    return qryx(0, R - 1, P, U, Q, V, 1);
}

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