Submission #98837

#	Time	Username	Problem	Language	Result	Execution time	Memory
98837		Alexa2001	Game (IOI13_game)	C++17	36 / 100	4913 ms	96444 KiB

game

#include "game.h"
#include <bits/stdc++.h>
#define left_son (node<<1)
#define right_son ((node<<1)|1)
#define mid ((st+dr)>>1)

using namespace std;

typedef long long ll;
const int Nmax = 2005;

int N, M, Nr100, Nr10, Y1, Y2;
ll ans, a[Nmax + 200][Nmax + 200];


ll gcd2(ll X, ll Y)
{
    if(!Y) return X;
    ll rest = X % Y;
    while(rest)
        X = Y, Y = rest, rest = X % Y;
    return Y;
}


class SegTree
{
    ll a[Nmax<<2];
public:
    void update(int node, int st, int dr, int pos, ll val)
    {
        if(st == dr)
        {
            a[node] = val;
            return;
        }
        if(pos <= mid) update(left_son, st, mid, pos, val);
            else update(right_son, mid+1, dr, pos, val);
        a[node] = gcd2(a[left_son], a[right_son]);
    }

    void query(int node, int st, int dr, int L, int R)
    {
        if(L <= st && dr <= R)
        {
            ans = gcd2(a[node], ans);
            return;
        }
        if(L <= mid) query(left_son, st, mid, L, R);
        if(mid < R) query(right_son, mid+1, dr, L, R);
    }
} aint[2 * Nmax];




void init(int R, int C)
{
    if(!(R <= 2000 && C <= 2000)) exit(0);
    N = R; M = C;

    Nr100 = (R-1) / 100 + 1;
    Nr10 = (R-1) / 10 + 1;
}

int up(int x, int y) /// primul multiplu de y care e >= x
{
    return (x + y - 1) / y;
}
int down(int x, int y)
{
    if(x + 1 - y < 0) return -1;
    return (x - y + 1) / y;
}

void update(int x, int y, ll K)
{
    a[x][y] = K;

    int i, id;
    ll val;

    id = x / 100; val = 0;
    for(i = id*100; i < id*100 + 100; ++i) val = gcd2(a[i][y], val);
    aint[id].update(1, 0, M-1, y, val);

    id = x / 10; val = 0;
    for(i = id*10; i < id*10 + 10; ++i) val = gcd2(a[i][y], val);
    aint[id + Nr100].update(1, 0, M-1, y, val);

    aint[x + Nr100 + Nr10].update(1, 0, M-1, y, K);
}

void query1(int l, int r)
{
    if(l > r) return;
    int i;
    for(i=l; i<=r; ++i)
        aint[Nr100 + Nr10 + i].query(1, 0, M-1, Y1, Y2);
}

void query10(int l, int r)
{
    if(l > r) return;
    int i, L = up(l, 10), R = down(r, 10);

    if(L > R)
    {
        query1(l, r);
        return;
    }

    for(i=L; i<=R; ++i)
        aint[i + Nr100].query(1, 0, M-1, Y1, Y2);

    query1(l, L * 10 - 1);
    query1(R * 10 + 10, r);
}

void query100(int l, int r)
{
    if(l > r) return;
    int i, L = up(l, 100), R = down(r, 100);

    if(L > R)
    {
        query10(l, r);
        return;
    }

    for(i=L; i<=R; ++i)
        aint[i].query(1, 0, M-1, Y1, Y2);

    query10(l, L * 100 - 1);
    query10(R * 100 + 100, r);
}

ll calculate(int P, int Q, int U, int V)
{
    int X1, X2;
    X1 = min(P, U);
    X2 = max(P, U);
    Y1 = min(Q, V);
    Y2 = max(Q, V);

    ans = 0;
    query100(X1, X2);
    return ans;
}

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