oj.uz

답안 #156195

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
156195 2019-10-04T11:18:05 Z theboatman Money (IZhO17_money) C++17
0 / 100
 16 ms 15996 KB 
#include <bits/stdc++.h>

#define y1 theboatman
#define make_struct(args...) {args}

using namespace std;

const int inf = 1e9 + 10;
const int N = 1e6 + 10;

struct tree {
    int n;
    vector <int> t;

    void init(int temp) {
        n = temp;
        t.resize(n * 4);
    }

    void inc(int pos) {
        for(int i = pos; i <= n; i += i & -i) {
            t[i] |= 1;
        }
    }

    int get(int pos) {
        int res = 0;
        for(int i = pos; i > 0; i -= i & -i) {
            res += t[i];
        }

        return res;
    }

    int get(int l, int r) {
        return get(r) - get(l - 1);
    }
};

int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);

    int n;
    cin >> n;

    vector <int> a(n);
    for(int i = 0; i < n; i++) {
        cin >> a[i];
    }

    int now = 0, x = 0;
    while(now < n && x <= a[now]) {
        x = a[now];
        now++;
    }

    tree bank;
    bank.init(N);

    set <int> s;
    for(int i = 0; i < now; i++) {
        bank.inc(a[i]);

        s.insert(a[i]);
    }

    int ans = 0;
    for(int i = now; i < n; i++) {
        ans++;

        int l = *s.begin(), r = *--s.end();
        //cout << a[i] << " " << l << " " << r << endl;
        if (a[i] >= r) {
            int x = 0;
            while(i < n && x <= a[i]) {
                x = a[i];

                bank.inc(x);
                s.insert(x);

                i++;
            }
            i--;
        }
        else {
            vector <int> lazy;
            if (a[i] < l) {
                int x = 0;
                while(i < n && x <= a[i] && a[i] <= l) {
                    x = a[i];
                    lazy.push_back(x);
                    i++;
                }
                i--;
            }
            else {
                int x = 0;
                int les = *--s.upper_bound(a[i]);

                while(i < n && x <= a[i]) {
                    auto more = s.lower_bound(a[i]);
                    if (more == s.end()) {
                        break;
                    }

                    int pos = bank.get(1, les);
                    int pos1 = bank.get(1, *more);

                    //cout << les << " " << *more << " " << pos << " " << pos1 << " " << i << endl;

                    if (pos1 - pos <= 1) {
                        x = a[i];
                        lazy.push_back(x);
                        i++;
                    }
                    else {
                        break;
                    }
                }

                i--;
            }

            for(auto it : lazy) {
                bank.inc(it);
                s.insert(it);
            }
        }
    }

    cout << ans + 1 << "\n";
    return 0;
}

/*
find_by_order(X) k -> элемент, нумерация с нуля
order_of_key(X) кол-во < чем X
*/

Subtask #1
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 15996 KB Output is correct
2 Incorrect 16 ms 15992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 15996 KB Output is correct
2 Incorrect 16 ms 15992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 15996 KB Output is correct
2 Incorrect 16 ms 15992 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #4
0 / 55.0

# 결과 실행 시간 메모리 Grader output
1 Correct 16 ms 15996 KB Output is correct
2 Incorrect 16 ms 15992 KB Output isn't correct
3 Halted 0 ms 0 KB -