Key cutting

#include <bits/stdc++.h>
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
#define all(x) x.begin(), x.end()
#define rep(i,a,b) for(int i=a; i<=b; i++)
template<typename T> ostream& operator<<(ostream& os, const vector<T> v){ for(const auto& x : v){ os << x << " ";} return os; }
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>> y){
    for(const auto& v : y){
    for(const auto& x : v) {os << x << " ";} cout << "\n";} return os;
}

int main(){
    ios::sync_with_stdio(0);

    ll n;
    cin >> n;

    vector<ll> ds;
    for(int i=0; i<n; i++){
        ll c;
        cin >> c;
        ds.push_back(c);
    }

    set<ll> uds2(ds.begin(), ds.end());
    vector<ll> uds(uds2.begin(), uds2.end());

    int count = 0;
    for(auto d : uds){
        if(d == 0)
            continue;
        ll s = -1;
        for(ll i=0; i<n; i++){
            if(ds[i] == d && s == -1){
                s = i;
                count ++;
            }
            else if(ds[i] < d){
                s = -1;
            }
        }
    }
    
    cout << count << "\n";
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED