Submission #897679

#	Time	Username	Problem	Language	Result	Execution time	Memory
897679		mihtriii295	Hindeks (COCI17_hindeks)	C++17	50 / 50	68 ms	5540 KiB

hindeks

#include<bits/stdc++.h>
#pragma GCC optimize("O2")
#define ll  long long
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define el  cout << '\n' 

using namespace std;

const ll N = 5e5 + 1;
const ll logN = 20;
const ll MOD = 1e9 + 7;

int n, a[N], res, d;
int main(){
    if(fopen("coci1617_r6_hindeks.inp", "r")){
        freopen("coci1617_r6_hindeks.inp", "r", stdin);
        freopen("coci1617_r6_hindeks.out", "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(NULL);
    cout.tie(NULL);
    cin >> n;
    for (int i = 1; i <= n; ++i)
        cin >> a[i];
    sort(a + 1, a + 1 + n, greater<int>());
    int i = 1;
    while (i <= n && a[i] >= i)
        ++i;
    cout << i - 1;
    return 0;
}

Compilation message (stderr)

hindeks.cpp: In function 'int main()':
hindeks.cpp:16:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |         freopen("coci1617_r6_hindeks.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
hindeks.cpp:17:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |         freopen("coci1617_r6_hindeks.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 50 / 50