Submission #524017

#	Time	Username	Problem	Language	Result	Execution time	Memory
524017		Nursik	Money (IZhO17_money)	C++14	100 / 100	185 ms	8636 KiB

money

#include <bits/stdc++.h>

#define pb push_back
#define ll long long
#define ld long double
#define f first
#define s second
#define mp make_pair

const ll maxn = 1e6 + 100, maxm = 3e5 + 1,  maxk = 61;
const ll inf = 1000000000, mod = inf + 7, mod2 = 998244353;
const ll pa = 31, block = 400;

using namespace std;

int n;
int a[maxn], f[maxn];
void upd(int pos, int val){
    for (int i = pos; i <= 1e6; i |= (i + 1)){
        f[i] += val;
    }
}
int get(int pos){
    int res = 0;
    for (int i = pos; i >= 1; i = (i & (i + 1)) - 1){
        res += f[i];
    }
    return res;
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i){
        cin >> a[i];
    }
    int pos = 1, ans = 0;
    vector<int> v;
    v.pb(0), v.pb(inf);
    while (pos <= n){
        int mx = 0, mn = inf, answ = pos;;
        for (int j = pos; j <= n; ++j){
            if ((j == pos) || (j - 1 >= pos && a[j] >= a[j - 1])){
                mx = max(mx, a[j]);
                mn = min(mn, a[j]);
                int range = get(mx - 1) - get(mn);
                range = max(range, 0);
                if (range == 0){
                    answ = j;
                }
                else{
                    break;
                }
            }
            else{
                break;
            }
        }
        ans++;
      //  cout << pos << " " << answ << '\n';
        for (int j = pos; j <= answ; ++j){
            upd(a[j], 1);
        }
        pos = answ + 1;
    }
    cout << ans;
}

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