24 lines
453 B
C++
24 lines
453 B
C++
#include <bits/stdc++.h>
|
||
using namespace std;
|
||
const int N = 1e6 + 10;//题单数量上限
|
||
int a[N];//每套题单里面的题的数量
|
||
|
||
int main() {
|
||
int n;
|
||
cin >> n;
|
||
for (int i = 1; i <= n; i++)
|
||
cin >> a[i];
|
||
sort(a + 1, a + 1 + n);
|
||
|
||
int h = 1;//排完序后，待比较的题单号
|
||
for (int i = 1;;) { //枚举每一天，依赖break停止
|
||
if (a[h] >= i) //允许，可以走到一天
|
||
i++;
|
||
if (++h > n) {
|
||
cout << i - 1 << endl;
|
||
break;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|