Submission #594853

#	Time	Username	Problem	Language	Result	Execution time	Memory
594853		zeroesandones	Simple game (IZhO17_game)	C++17	100 / 100	71 ms	6812 KiB

game

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

typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll, ll> pi;

#define FOR(i, j, k) for (ll i = j; i < (ll) k; ++i)
#define FORD(i, j, k) for (ll i = j; i >= (ll) k; --i)
#define nl "\n"
#define all(x) (x).begin(), (x).end()

#define sc second
#define fr first
#define pb push_back

const int mxN = (1e6 + 1);
int tree[(int) 1e6 + 1] = {};
int n;

int sum(int k) {
    int s = 0;
    while(k >= 1) {
        s += tree[k];
        k -= k&-k;
    }
    return s;
}

void add(int k, int x) {
    while(k <= mxN) {
        tree[k] += x;
        k += k&-k;
    }
}

void newL(int a, int b) {
    if(a > b)
        swap(a, b);
    add(a + 1, 1);
    add(b, -1);
}

void removeL(int a, int b) {
    if(a > b)
        swap(a, b);
    add(a + 1, -1);
    add(b, 1);
}

void solve()
{
    int m;
    cin >> n >> m;

    int a[n + 1];
    FOR(i, 1, n + 1)
        cin >> a[i];

    FOR(i, 2, n + 1) {
        newL(a[i], a[i - 1]);
    }

    FOR(i, 0, m) {
        int x;
        cin >> x;
        if(x == 1) {
            int p, h;
            cin >> p >> h;
            if(p != 1) {
                removeL(a[p], a[p - 1]);
                newL(a[p - 1], h);
            }
            if(p != n) {
                removeL(a[p], a[p + 1]);
                newL(a[p + 1], h);
            }
            a[p] = h;
        } else {
            int p;
            cin >> p;
            cout << sum(p) << nl;
        }
    }
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

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