#include <bits/stdc++.h>
using namespace std;
const int N = 1e6 + 5;
int cnt[N];
signed main() {
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int n;
cin >> n;
int ans = 0;
for (int i = 1; i <= n; i++) {
int x;
cin >> x;
if (cnt[x + 1]) cnt[x + 1]--;
else ans++;
cnt[x]++;
}
cout << ans << "\n";
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Output is correct |
2 |
Correct |
0 ms |
344 KB |
Output is correct |
3 |
Correct |
1 ms |
344 KB |
Output is correct |
4 |
Correct |
1 ms |
344 KB |
Output is correct |
5 |
Correct |
41 ms |
348 KB |
Output is correct |
6 |
Correct |
43 ms |
348 KB |
Output is correct |
7 |
Correct |
35 ms |
344 KB |
Output is correct |
8 |
Correct |
33 ms |
344 KB |
Output is correct |
9 |
Correct |
38 ms |
452 KB |
Output is correct |
10 |
Correct |
37 ms |
348 KB |
Output is correct |