#include <bits/stdc++.h>
using namespace std;
const int N=1e6+55;
int b[N];
int main()
{
int ans=0;
int n;
cin>>n;
int x;
for(int i=0;i<n;i++)
{
cin>>x;
if(b[x]==0)
{
ans++;
b[x-1]++;
}
else
{
b[x]--;
b[x-1]++;
}
}
cout<<ans<<endl;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
248 KB |
Output is correct |
2 |
Correct |
2 ms |
356 KB |
Output is correct |
3 |
Correct |
2 ms |
596 KB |
Output is correct |
4 |
Correct |
3 ms |
732 KB |
Output is correct |
5 |
Correct |
235 ms |
4472 KB |
Output is correct |
6 |
Correct |
238 ms |
7984 KB |
Output is correct |
7 |
Correct |
200 ms |
10784 KB |
Output is correct |
8 |
Correct |
176 ms |
13624 KB |
Output is correct |
9 |
Correct |
203 ms |
16792 KB |
Output is correct |
10 |
Correct |
201 ms |
19896 KB |
Output is correct |