Submission #540986

#	Time	Username	Problem	Language	Result	Execution time	Memory
540986		creeped	Money (IZhO17_money)	C++14	100 / 100	1205 ms	61932 KiB

money

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

ll n,a[1000002];
ll cnt;

int main() {

    //freopen("money.in", "r", stdin);
    //freopen("money.out", "w", stdout);

    cin>>n;
    for(ll i=1;i<=n;i++)
        cin>>a[i];
    
    set<ll> st;
    st.insert(100000000);
    int next = 100000000;

    for(ll i=1;i<=n;i++)
    {
        if(i > 1 && a[i] == a[i-1])
            continue;
        auto cur = st.lower_bound(a[i]);
        if(i == 1 || a[i] < a[i-1] || *cur != next)
            cnt ++, next = *st.upper_bound(a[i]);
        st.insert(a[i]);
    }
    cout<<cnt<<endl;

}

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