Submit solution
Points:
0.90
Time limit:
1.0s
Memory limit:
512M
Input:
stdin
Output:
stdout
Problem source:
Problem type
Allowed languages
C, C++, Go, Java, Kotlin, Pascal, PyPy, Python, Rust, Scratch
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Sample Input 1
5 4
1 2
2 3
3 4
4 5
Sample Output 1
13
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