1 条题解

  • 0
    @ 2025-6-22 11:35:21
    #include <bits/stdc++.h>
    #define int long long
    using namespace std;
    const int MAXN = 500000 + 5;
    int n, m;
    int a[MAXN];
    //线段树
    bool flag[MAXN << 2];
    int t[MAXN << 2];
    void up(int now)
    {
        t[now] = t[now * 2] + t[now * 2 + 1];
        flag[now] = flag[now * 2] && flag[now * 2 + 1];
    }
    void build(int now, int l, int r)
    {
        if (l == r)
        {
            t[now] = a[l];
            flag[now] = t[now] == 1 || t[now] == 0;
            return;
        }
        int mid = (l + r) / 2;
        build(now * 2, l, mid);
        build(now * 2 + 1, mid + 1, r);
        up(now);
    }
    void update(int now, int l, int r, int x, int y)
    {
        if (flag[now])
            return;
        if (l == r)
        {
            t[now] = sqrt(t[now]);
            flag[now] = t[now] == 1 || t[now] == 0;
            return;
        }
        int mid = (l + r) / 2;
        if (x <= mid)
            update(now * 2, l, mid, x, y);
        if (y > mid)
            update(now * 2 + 1, mid + 1, r, x, y);
        up(now);
    }
    int query(int now, int l, int r, int x, int y)
    {
        if (x <= l && r <= y)
            return t[now];
        int res = 0;
        int mid = (l + r) / 2;
        if (x <= mid)
            res += query(now * 2, l, mid, x, y);
        if (y > mid)
            res += query(now * 2 + 1, mid + 1, r, x, y);
        return res;
    }
    signed main()
    {
        ios::sync_with_stdio(false);
        cin.tie(0);
        cin >> n;
        for (int i = 1; i <= n; i++)
            cin >> a[i];
        build(1, 1, n);
        cin >> m;
        while (m--)
        {
            int op, l, r;
            cin >> op >> l >> r;
            if (l > r)
                swap(l, r);
            if (op == 0)
                update(1, 1, n, l, r);
            else
                cout << query(1, 1, n, l, r) << "\n";
        }
        return 0;
    }
    
    
    • 1

    上帝造题的七分钟 2 / 花神游历各国

    信息

    ID
    4849
    时间
    1000ms
    内存
    125MiB
    难度
    5
    标签
    递交数
    21
    已通过
    12
    上传者