oj.uz

Submission #947402

# Submission time Handle Problem Language Result Execution time Memory
947402 2024-03-16T06:23:56 Z GrandTiger1729 Simple game (IZhO17_game) C++17
0 / 100
 63 ms 94324 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1e6 + 10;
struct SegTree
{
    int l, r, mid;
    SegTree *lc, *rc;
    int val = 0;
    SegTree(int l_, int r_) : l(l_), r(r_)
    {
        mid = (l + r) / 2;
        if (l == r - 1)
        {
            return;
        }
        lc = new SegTree(l, mid);
        rc = new SegTree(mid, r);
    }
    void add(int ll, int rr, int u)
    {
        if (ll <= l && rr >= r)
        {
            val += u;
            return;
        }
        if (ll < mid)
        {
            lc->add(ll, rr, u);
        }
        if (mid < rr)
        {
            rc->add(ll, rr, u);
        }
    }
    int query(int i)
    {
        if (l == r - 1)
        {
            return val;
        }
        int ret = val;
        if (i < mid)
        {
            ret += lc->query(i);
        }
        else
        {
            ret += rc->query(i);
        }
        return ret;
    }
};

int main()
{
    cin.tie(0)->sync_with_stdio(0);
    int n, q;
    cin >> n >> q;
    vector<int> a(n);
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
    }
    SegTree st(0, N);
    auto add = [&](int l, int r, int u)
    {
        if (l > r)
        {
            swap(l, r);
        }
        st.add(l, r, u);
    };
    for (int i = 1; i < n; i++)
    {
        add(a[i - 1], a[i], 1);
    }
    while (q--)
    {
        int op;
        cin >> op;
        if (op == 1)
        {
            int i, x;
            cin >> i >> x;
            i--;
            if (i > 0)
            {
                add(a[i - 1], a[i], -1);
                a[i] = x;
                add(a[i - 1], a[i], 1);   
            }
            if (i + 1 < n)
            {
                add(a[i], a[i + 1], -1);
                a[i] = x;
                add(a[i], a[i + 1], 1);
            }
        }
        else
        {
            int x;
            cin >> x;
            int ans = st.query(x);
            cout << ans << '\n';
        }
    }
    return 0;
}

Subtask #1
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 94324 KB Output is correct
2 Incorrect 63 ms 94292 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 94324 KB Output is correct
2 Incorrect 63 ms 94292 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 94324 KB Output is correct
2 Incorrect 63 ms 94292 KB Output isn't correct
3 Halted 0 ms 0 KB -