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답안 #487604

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
487604 2021-11-16T09:30:02 Z KazamaHoang Hindeks (COCI17_hindeks) C++14
50 / 50
 59 ms 9388 KB 
#include <bits/stdc++.h>

using namespace std;

struct FenwickTree {
    vector<int> ft;

    FenwickTree() {
        ft.resize((int)1e6+5, 0);
    }

    int get(int x) {
        int res = 0;
        for (; x <= 1e6; x += x & -x)
            res += ft[x];
        return res;
    }

    void update(int x) {
        for (; x; x -= x & -x)
            ft[x] ++;
    }
};

int n, a[500005];
FenwickTree ft;

int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    for (int i = 1; i <= n; ++ i) {
        cin >> a[i];
        ft.update(a[i]);
    }
    for (int i = n; i >= 1; -- i) {
        if (ft.get(i) >= i) {
            cout << i;
            return 0;
        }
    }
    cout << 0;
    return 0;
}

Subtask #1
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4176 KB Output is correct
2 Correct 2 ms 4176 KB Output is correct
3 Correct 2 ms 4176 KB Output is correct
4 Correct 2 ms 4176 KB Output is correct
5 Correct 2 ms 4216 KB Output is correct
6 Correct 2 ms 4176 KB Output is correct
7 Correct 3 ms 4256 KB Output is correct
8 Correct 12 ms 5156 KB Output is correct
9 Correct 59 ms 9388 KB Output is correct
10 Correct 28 ms 6888 KB Output is correct