#include <bits/stdc++.h>
#define ll long long
#define fast ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
int n;
int a[1000009],b[1000009];
int main()
{
cin>>n;
for(int i=0;i<n;i++)cin>>a[i];
for(int i=n-1;i>-1;i--)
{
if (b[a[i]-1]>0)b[a[i]-1]--;
b[a[i]]++;
}
ll sum=0;
for(int i=1;i<1000003;i++)sum+=b[i];
cout<<sum;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
376 KB |
Output is correct |
2 |
Correct |
5 ms |
376 KB |
Output is correct |
3 |
Correct |
5 ms |
376 KB |
Output is correct |
4 |
Correct |
6 ms |
376 KB |
Output is correct |
5 |
Correct |
339 ms |
7032 KB |
Output is correct |
6 |
Correct |
340 ms |
7516 KB |
Output is correct |
7 |
Correct |
274 ms |
6008 KB |
Output is correct |
8 |
Correct |
442 ms |
6008 KB |
Output is correct |
9 |
Correct |
306 ms |
6532 KB |
Output is correct |
10 |
Correct |
302 ms |
6520 KB |
Output is correct |