Submission #768016

#	Time	Username	Problem	Language	Result	Execution time	Memory
768016		raysh07	Simple game (IZhO17_game)	C++17	100 / 100	65 ms	11164 KiB

game

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define INF (int)1e18
#define f first
#define s second

mt19937_64 RNG(chrono::steady_clock::now().time_since_epoch().count());

const int N = 1e6;
int f[N + 1], a[N + 1];
int n, q;

void upd(int x, int v){
    for (int i = x; i <= N; i += i & (-i)){
        f[i] += v;
    }
}

int query(int x){
    int res = 0;
    for (int i = x; i; i -= i & (-i)){
        res += f[i];
    }
    
    return res;
}

void ok(int i, int orz){
    int mn = min(a[i], a[i - 1]);
    int mx = max(a[i], a[i - 1]);
    
    upd(mn, 1 * orz);
    upd(mx + 1, -1 * orz);
}

void Solve() 
{
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
        
        if (i != 1) ok(i, 1);
    }
    
    while(q--){
        int t; cin >> t;
        
        if (t == 1){
            int p, v; cin >> p >> v;
            
            if (p != 1) ok(p, -1);
            if (p != n) ok(p + 1, -1);
            
            a[p] = v;
            
            if (p != 1) ok(p, 1);
            if (p != n) ok(p + 1, 1);
        } else {
            int x; cin >> x;
            
            cout << query(x) << "\n";
        }
    }
}

int32_t main() 
{
    auto begin = std::chrono::high_resolution_clock::now();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int t = 1;
 //   cin >> t;
    for(int i = 1; i <= t; i++) 
    {
        //cout << "Case #" << i << ": ";
        Solve();
    }
    auto end = std::chrono::high_resolution_clock::now();
    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(end - begin);
    cerr << "Time measured: " << elapsed.count() * 1e-9 << " seconds.\n"; 
    return 0;
}

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