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453 B

1 year ago
#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 10;//<2F><EFBFBD><E2B5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int a[N];//ÿ<><C3BF><EFBFBD><EFBFBD><E2B5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󣬴<EFBFBD><F3A3ACB4>Ƚϵ<C8BD><CFB5><EFBFBD><E2B5A5>
for (int i = 1;;) { //ö<><C3B6>ÿһ<C3BF><EFBFBD><ECA3AC><EFBFBD><EFBFBD>breakֹͣ
if (a[h] >= i) //<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߵ<EFBFBD>һ<EFBFBD><D2BB>
i++;
if (++h > n) {
cout << i - 1 << endl;
break;
}
}
return 0;
}