#include <bits/stdc++.h>
using namespace std;
#define ll long long
const ll bignum=1e17;
const int inf= 2e9;
const int mod= 1e9+7;
ll arr[1000001];
int main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
memset(arr,0,sizeof(arr));
ll n,ele,ans=0;
cin>>n;
for (int i=0;i<n;i++){
cin>>ele;
if (arr[ele]==0){
ans++;
arr[ele-1]++;
}
else{
arr[ele]--;
arr[ele-1]++;
}
}
cout<<ans;
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
4 ms |
8172 KB |
Output is correct |
2 |
Correct |
4 ms |
8172 KB |
Output is correct |
3 |
Correct |
5 ms |
8172 KB |
Output is correct |
4 |
Correct |
4 ms |
8172 KB |
Output is correct |
5 |
Correct |
71 ms |
11884 KB |
Output is correct |
6 |
Correct |
71 ms |
11756 KB |
Output is correct |
7 |
Correct |
57 ms |
11116 KB |
Output is correct |
8 |
Correct |
57 ms |
10988 KB |
Output is correct |
9 |
Correct |
65 ms |
11500 KB |
Output is correct |
10 |
Correct |
66 ms |
11372 KB |
Output is correct |