Submission #1368900

#TimeUsernameProblemLanguageResultExecution timeMemory
1368900chithanhnguyenGame (IOI13_game)C++20
80 / 100
2069 ms184812 KiB
/*
Author: Nguyen Chi Thanh - High School for the Gifted - VNU.HCM (i2528)
*/
#ifndef NCTHANH
#include "game.h"
#endif

#include <bits/stdc++.h>
using namespace std;

// Copied from sample code
long long gcd2(long long X, long long Y) {
    long long tmp;
    while (X != Y && Y != 0) {
        tmp = X;
        X = Y;
        Y = tmp % Y;
    }
    return X;
}

/* START OF TEMPALTE */

// #define int long long
#define ll long long
#define ull unsigned long long
#define ld long double
#define pii pair<int, int>
#define pll pair<ll, ll>
#define fi first
#define se second
#define popcount __builtin_popcountll
#define all(x) (x).begin(), (x).end()
#define BIT(x, i) (((x) >> (i)) & 1)
#define MASK(x) (1ll << (x))
#define SZ(a) ((int32_t)a.size())

#define debug(a, l, r) {for (int _i = (l); _i <= (r); ++_i) cout << (a)[_i] << ' '; cout << '\n';}

template<class X, class Y>
bool minimize(X &x, const Y &y) {
    if (x > y) {
        x = y;
        return true;
    } else return false;
}

template<class X, class Y>
bool maximize(X &x, const Y &y) {
    if (x < y) {
        x = y;
        return true;
    } else return false;
}

/* END OF TEMPALTE */

const int MAXNODE1D = 1e7 + 5;
const int MAXNODE2D = 2e6 + 5;

int n, m;

struct Node1D {
    int leftChild, rightChild;
    ll val;

    Node1D() : leftChild(0), rightChild(0), val(0) {}
} nodes[MAXNODE1D];
int numNodes1D = 0;

struct SegmentTree1D {
    int root;

    SegmentTree1D() : root(0) {}

    void update(int &id, int l, int r, int pos, ll val) {
        if (id == 0) id = ++numNodes1D;

        if (l == r) {
            nodes[id].val = val;
            return;
        }

        int mid = (l + r) >> 1;
        if (pos <= mid) update(nodes[id].leftChild, l, mid, pos, val);
        else update(nodes[id].rightChild, mid + 1, r, pos, val);

        int left = nodes[id].leftChild, right = nodes[id].rightChild;
        nodes[id].val = gcd2(nodes[left].val, nodes[right].val);
    }

    ll query(int id, int l, int r, int u, int v) {
        if (!id || v < l || r < u) return 0ll;
        if (u <= l && r <= v) return nodes[id].val;

        int mid = (l + r) >> 1;
        ll get1 = query(nodes[id].leftChild, l, mid, u, v);
        ll get2 = query(nodes[id].rightChild, mid + 1, r, u, v);

        return gcd2(get1, get2);
    }
};  

struct Node2D {
    SegmentTree1D seg;
    int leftChild, rightChild;

    Node2D() : seg(), leftChild(0), rightChild(0) {}
} nodes2D[MAXNODE2D];
int numNodes2D = 0;

struct SegmentTree2D {
    int root;
    
    SegmentTree2D() : root(0) {}

    void update(int &id, int l, int r, int x, int y, ll val) {
        if (id == 0) id = ++numNodes2D;

        if (l == r) {
            nodes2D[id].seg.update(
                nodes2D[id].seg.root, 1, m,
                y, val
            );

            return;
        }

        int mid = (l + r) >> 1;
        if (x <= mid) update(nodes2D[id].leftChild, l, mid, x, y, val);
        else update(nodes2D[id].rightChild, mid + 1, r, x, y, val);

        ll leftVal = 0;
        ll rightVal = 0;

        if (nodes2D[id].leftChild) {
            leftVal = nodes2D[nodes2D[id].leftChild].seg.query(
                nodes2D[nodes2D[id].leftChild].seg.root, 1, m,
                y, y
            );
        }

        if (nodes2D[id].rightChild) {
            rightVal = nodes2D[nodes2D[id].rightChild].seg.query(
                nodes2D[nodes2D[id].rightChild].seg.root, 1, m,
                y, y
            );
        }

        nodes2D[id].seg.update(
            nodes2D[id].seg.root, 1, m,
            y, gcd2(leftVal, rightVal)
        );
    }

    ll query(int id, int l, int r, int x1, int y1, int x2, int y2) {
        if (!id || x2 < l || r < x1) return 0ll;

        if (x1 <= l && r <= x2) {
            return nodes2D[id].seg.query(
                nodes2D[id].seg.root, 1, m,
                y1, y2
            );
        }

        int mid = (l + r) >> 1;

        return gcd2(
            query(nodes2D[id].leftChild, l, mid, x1, y1, x2, y2),
            query(nodes2D[id].rightChild, mid + 1, r, x1, y1, x2, y2)
        );
    }
};

SegmentTree2D seg;

void init(int R, int C) {
    n = R; m = C;
    return;
}

void update(int P, int Q, ll K) {
    P++; Q++;
    seg.update(seg.root, 1, n, P, Q, K);
    return; 
}

ll calculate(int P, int Q, int U, int V) {
    P++; Q++; U++; V++;
    ll ans = seg.query(seg.root, 1, n, P, Q, U, V);
    return ans;
}

#ifdef NCTHANH
signed main() {
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr); cout.tie(nullptr);

    int R, C, Q; cin >> R >> C >> Q;
    init(R, C);

    while (Q--) {
        int type; cin >> type;
        if (type == 1) {
            int P, Q, K; cin >> P >> Q >> K;
            update(P, Q, K);
        } else {
            int P, Q, U, V;
            cin >> P >> Q >> U >> V;
            cout << calculate(P, Q, U, V) << '\n';
        }
    }

    return 0;
}
#endif
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