Submission #1303394

#	Time	Username	Problem	Language	Result	Execution time	Memory
1303394		duchieulc	Money (IZhO17_money)	C++20	0 / 100	1 ms	568 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];
vector <pll> v;
void solve() {  
    cin >> n;
    for(ll i=1; i<=n; ++i)  cin >> a[i];
    ll l = 1;
    for(ll i=1; i<=n+1; ++i) {
        if(a[i] < a[i-1]) {
            v.pb({a[l],a[i-1]});
            l = i;
        }
    }
    sort(v.begin(), v.end(), [](pll x, pll y) {
        if(x.F == y.F)  return x.S > y.S;
        return x.F < y.F;
    });
    set <pll> s;
    s.insert({0,0});
    for(auto i:v) {
        for(auto it = s.rbegin(); it!=s.rend(); ++it) {
            if(it->S <= i.F || it->F <= i.F && i.S <= it->S) {
                s.insert(i);
                break;
            }
            else {
                s.insert({it->S, i.S});  
                i.S = it->S;
            }
        }
    }
    cout << s.size() - 1;
    // for(auto it = s.rbegin  (); it != s.rend(); ++it) {
    //     cout << it->F << " " << it->S << "\n"; 
    // }
}

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: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55