#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
const int N = 1e6 + 10;
int n;
map<int, int> cnt;
int res;
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
// freopen("Baloni.inp", "r", stdin);
// freopen("Baloni.out", "w", stdout);
cin >> n;
for(int i = 1; i <= n; i++)
{
int a; cin >> a;
if(cnt[a + 1])
{
cnt[a + 1]--;
}
else res++;
cnt[a]++;
}
cout << res;
return 0;
}
/// Code by vuavisao
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
1 ms |
340 KB |
Output is correct |
2 |
Correct |
1 ms |
340 KB |
Output is correct |
3 |
Correct |
1 ms |
340 KB |
Output is correct |
4 |
Correct |
2 ms |
340 KB |
Output is correct |
5 |
Correct |
210 ms |
4004 KB |
Output is correct |
6 |
Correct |
210 ms |
3916 KB |
Output is correct |
7 |
Correct |
155 ms |
3168 KB |
Output is correct |
8 |
Correct |
153 ms |
3164 KB |
Output is correct |
9 |
Correct |
181 ms |
3568 KB |
Output is correct |
10 |
Correct |
199 ms |
3412 KB |
Output is correct |