Submission #345535

#	Time	Username	Problem	Language	Result	Execution time	Memory
345535		_ani	Simple game (IZhO17_game)	C++17	100 / 100	469 ms	11256 KiB

game

#include <iostream>
#include <algorithm>
#include <vector>
using namespace std;
const int N = 1'000'002;
const int H = 1'000'000;
int a[N], t[4 * N];
void Upd (int v, int vl, int vr, int l, int r, int val)
{
    if (vl == l && r == vr)
    {
        t[v] += val;
        return;
    }
    int m = (vl + vr) / 2;
    if (l <= m)
        Upd (v * 2, vl, m, l, min (r, m), val);
    if (r > m)
        Upd (v * 2 + 1, m + 1, vr, max (m + 1, l), r, val);
}
int Get (int v, int vl, int vr, int pos)
{
    if (vl == vr)
        return t[v];
    int m = (vl + vr) / 2;
    if (pos <= m)
        return t[v] + Get (v * 2, vl, m, pos);
    return t[v] + Get (v * 2 + 1, m + 1, vr, pos);
}
int main()
{
    int n, m;
    cin >> n >> m;
    for (int i = 0; i < n; i++)
    {
        cin >> a[i];
        if (i != 0)
        {
            Upd (1, 1, H, min (a[i - 1], a[i]), max (a[i - 1], a[i]), 1);
        }
    }
    while (m--)
    {
        int type;
        cin >> type;
        if (type == 1)
        {
            int pos, val;
            cin >> pos >> val;
            pos--;
            if (pos != 0)
            {
                Upd (1, 1, H, min (a[pos - 1], a[pos]), max (a[pos - 1], a[pos]), -1);
                Upd (1, 1, H, min (a[pos - 1], val), max (a[pos - 1], val), 1);
            }
            if (pos != n - 1)
            {
                Upd (1, 1, H, min (a[pos + 1], a[pos]), max (a[pos + 1], a[pos]), -1);
                Upd (1, 1, H, min (a[pos + 1], val), max (a[pos + 1], val), 1);
            }
            a[pos] = val;
        }
        else
        {
            int h;
            cin >> h;
            cout << Get (1, 1, H, h) << '\n';
        }
    }
    return 0;
}

• Subtask 1: 22 / 22
• Subtask 2: 27 / 27
• Subtask 3: 51 / 51