|| ||Code Submission Evaluation System
CSES Problem Set
Task | Statistics
CSES - Playlist
|Time limit:||1.00 s
||Memory limit:||512 MB|
You are given a playlist of a radio station since its establishment. The playlist has a total of $n$ songs.
What is the longest sequence of successive songs where each song is unique?
The first input line contains an integer $n$: the number of songs.
The next line has $n$ integers $k_1,k_2,\ldots,k_n$: the id number of each song.
Print the length of the longest sequence of unique songs.
- $1 \le n \le 2 \cdot 10^5$
- $1 \le k_i \le 10^9$
1 2 1 3 2 7 4 2