Submission #759636

#	Time	Username	Problem	Language	Result	Execution time	Memory
759636		raysh07	Money (IZhO17_money)	C++17	0 / 100	1 ms	212 KiB

money

#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());

void Solve() 
{
    int n; cin >> n;
    vector <int> a(n + 1);
    for (int i = 1; i <= n; i++) cin >> a[i];
    
    vector <int> curr;
    set <int> gone;
    vector <int> dp(n + 1, INF);
    dp[0] = 0;
    
    for (int i = 1; i <= n; i++){
        if (curr.size() == 0 || a[i] >= curr.back()){
            curr.push_back(a[i]);
        } else {
            for (auto x : curr) gone.insert(x);
            curr.clear();
            curr.push_back(a[i]);
        }
        
        auto id = gone.upper_bound(a[i]);
        if (id == gone.begin()){
            dp[i] = dp[i - curr.size()] + 1;
          //  cout << "SMH\n";
            continue;
        } 
        --id;
        int found = *id;
        int holy = curr.end() - lower_bound(curr.begin(), curr.end(), found);
        // cout << holy << " " << curr.size() << "\n";
        dp[i] = dp[i - holy] + 1;
    }
    
    // for (int i = 1; i <= n; i++) cout << dp[i] << " \n"[i == n];
    
    cout << dp[n] << "\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: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55