제출 #519780

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
519780		Dasha_Gnedko	Money (IZhO17_money)	C++17	100 / 100	165 ms	25308 KiB

money

#include <bits/stdc++.h>

//#include <ext/pb_ds/detail/standard_policies.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx2")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4")

using namespace std;

//using namespace __gnu_pbds;
//template <typename T> using ordered_set = tree <T, null_type, less < T >, rb_tree_tag, tree_order_statistics_node_update>;

mt19937 gen(time(0));

#define ll long long
#define ld long double
#define pb push_back
#define F first
#define S second
#define TIME clock() * 1.0 / CLOCKS_PER_SEC
#define sz(a) int32_t(a.size())
#define endl '\n'
//#define int long long

const int N = 1e6 + 100;
const int M = 31;
const int mod = 1e9 + 7;
const int inf = 1e9 + 7;

int a[N], nxt[N], cnt[N], cl[N];

int get(int v)
{
    if (v >= N - 1) return N - 1;
    if (cnt[v]) return v;
    return nxt[v] = get(nxt[v]);
}

int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#else
//    freopen("input.txt", "r", stdin);
//    freopen("output.txt", "w", stdout);
#endif // LOCAL

    int n;
    cin >> n;
    for(int i = 0; i < n; i++)
    {
        cin >> a[i];
        cnt[a[i]]++;
    }
    for(int i = 0; i < N - 1; i++)
        nxt[i] = i + 1;
    for(int i = n - 1; i >= 0; i--)
    {
        cnt[a[i]]--;
        cl[i] = get(a[i] + 1);
    }
    int ans = 0;
    for(int i = 0; i < n; )
    {
        ans++;
        int j = i + 1;
        int x = cl[i];
        while (j < n && a[j - 1] <= a[j] && a[j] <= x)
            j++;
        i = j;
    }
    cout << ans;
}

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