제출 #587470

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
587470		nguyen31hoang08minh2003	Hindeks (COCI17_hindeks)	C++14	50 / 50	75 ms	5484 KiB

hindeks

#include <bits/stdc++.h>
#define fore(i, a, b) for (int i = (a), i##_last = (b); i < i##_last; ++i)
#define fort(i, a, b) for (int i = (a), i##_last = (b); i <= i##_last; ++i)
#define ford(i, a, b) for (int i = (a), i##_last = (b); i >= i##_last; --i)
#define fi first
#define se second
#define pb push_back
#define sz(x) ((int)(x).size())
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
using namespace std;
using ll = long long;
using ld = long double;

template<class A, class B> bool maxi(A &a, const B &b) {return (a < b) ? (a = b, true):false;};
template<class A, class B> bool mini(A &a, const B &b) {return (a > b) ? (a = b, true):false;};

typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<vi> vvi;
typedef vector<vii> vvii;

const int maxN = 5e5 + 5;

int n, c[maxN];

int main() {
    #ifdef LOCAL
        freopen("input.INP", "r", stdin);
    #endif // LOCAL
    cin.tie(0) -> sync_with_stdio(0);
    cout.tie(0);
    cin >> n;
    fort(i, 1, n)
        cin >> c[i];
    sort(c + 1, c + 1 + n);
    ford(i, n, 1)
        if (c[n - i + 1] >= i) {
            cout << i << '\n';
            return 0;
        }
    cout << 0 << '\n';
    return 0;
}

• Subtask 1: 50 / 50