Submission #856069

#	Time	Username	Problem	Language	Result	Execution time	Memory
856069		vjudge1	Hindeks (COCI17_hindeks)	C++17	50 / 50	70 ms	4344 KiB

hindeks

#include <bits/stdc++.h>
using namespace std;

#pragma GCC optimize("Ofast,O3,unroll-loops")
#define int long long
#define vi vector<int>
#define vvi vector<vi>
#define pii pair<int, int>
#define vpi vector<pii>
#define vvpi vector<vpi>
#define vb vector<bool>
#define vvb vector<vb>
#define endl "\n"
#define sp << " " <<
#define F(i, s, n) for(int i = s; i < n; i++)
#define pb push_back
#define fi first
#define se second
int mod = 998244353;

int inf = LLONG_MAX >> 3;

int mult(int x, int y) {
    return (x%mod)*(y%mod)%mod;
}

void solve() {
    int n;
    cin >> n;
    int a[n];
    F(i, 0, n) cin >> a[i];
    sort(a, a + n);
    int l = 0, r = n, ans = 0;
    while(l <= r) {
        int m = (l + r) >> 1;
        int le = n - (lower_bound(a, a+n, m) - a);
        //cout << m sp le << endl;
        if(le >= m) {
            ans = max(m, ans);
            l = m + 1;
        } else {
            r = m - 1;
        }
    }
    cout << ans << endl;
}

void setIO() {
    ios::sync_with_stdio(0); cin.tie(0);
    #ifdef Local
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif
}
signed main() {
    setIO();
    int t = 1;
    //cin >> t;
    while(t--) solve();
}

• Subtask 1: 50 / 50