Submission #1314820

#TimeUsernameProblemLanguageResultExecution timeMemory
1314820kawhietGame (IOI13_game)C++20
37 / 100
13085 ms36028 KiB
#include <bits/stdc++.h>
#include "game.h"
using namespace std;

struct SegmentTree {
    int n;
    vector<long long> t;

    SegmentTree(int _n) {
        n = _n;
        t.resize(4 * n);
    }

    void update(int id, int tl, int tr, int i, long long v) {
        if (tl == tr) {
            t[id] = v;
            return;
        }
        int x = 2 * id + 1, y = x + 1, tm = (tl + tr) / 2;
        if (i <= tm) {
            update(x, tl, tm, i, v);
        } else {
            update(y, tm + 1, tr, i, v);
        }
        t[id] = gcd(t[x], t[y]);
    }

    long long get(int id, int tl, int tr, int l, int r) {
        if (r < tl || tr < l) return 0LL;
        if (l <= tl && tr <= r) {
            return t[id];
        }
        int x = 2 * id + 1, y = x + 1, tm = (tl + tr) / 2;
        return gcd(get(x, tl, tm, l, r), get(y, tm + 1, tr, l, r));
    }

    void update(int i, long long v) { update(0, 0, n - 1, i, v); }
    long long get(int l, int r) { return get(0, 0, n - 1, l, r); }
};

int n, m;
vector<SegmentTree> a;

void init(int R, int C) {
    n = R;
    m = C;
    for (int i = 0; i < n; i++) {
        a.push_back(SegmentTree(m));
    }
}

void update(int i, int j, long long k) {
    a[i].update(j, k);
}

long long calculate(int p, int q, int u, int v) {
    long long ans = 0;
    for (int i = p; i <= u; i++) {
        ans = gcd(ans, a[i].get(q, v));
    }
    return ans;
}
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