Submission #1303961

#	Time	Username	Problem	Language	Result	Execution time	Memory
1303961		duchieulc	Money (IZhO17_money)	C++20	100 / 100	907 ms	55228 KiB

money

#include <bits/stdc++.h>
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define F first
#define S second
#define pb push_back

using namespace std;
typedef long long ll;
typedef pair<ll,ll> pll;
const ll MAX = 1e6+7;
const ll MOD = 1e9+7;

ll n, a[MAX];
set <ll> s;
bool check(ll a, ll b) {
    auto r = s.upper_bound(a);
    ll r1 = *r; 
    return b<=r1;
}
void solve() {  
    cin >> n;
    for(ll i=1; i<=n; ++i) 
        cin >> a[i];
    ll ans = 0;
    s.insert(0);
    s.insert(1e6+1);
    vector <ll> v;
    a[n+1] = -1;
    ll m = 1e6+1, M = 0;
    for(ll i=1; i<=n+1; ++i) {
        m = min(m, a[i]);
        M = max(M, a[i]);
        if(check(m,M) && a[i] >= a[i-1]) v.pb(a[i]);
        else {
            ++ ans;
            for(auto j:v)   s.insert(j);
            v.clear();
            m = a[i];
            M = a[i];
            v.pb(a[i]);
        }
    }
    cout << ans;

}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    //if(fopen("TASK.INP","r")) {
    //    freopen("TASK.INP","r",stdin);
    //    freopen("TASK.OUT","w",stdout);
    //}
    solve();
    // cerr << "\n" << "Time elapsed: " << TIME << "s\n";
    return 0;
}

• Subtask 1: 9 / 9
• Subtask 2: 16 / 16
• Subtask 3: 20 / 20
• Subtask 4: 55 / 55