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Đoàn kết (THTA Đà Nẵng 2025)
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Authors:
Small
,
TrietPD
,
LeNam2021
Problem types
math (toán học), combinatorics (tổ hợp), adhoc
Points:
1500 (p)
Time limit:
1.0s
Memory limit:
256M
Input:
stdin
Output:
stdout
Yêu cầu:
Dữ liệu
Kết quả
Ràng buộc
Ví dụ
Test 1
Input
5 5
Output
6
Test 2
Input
6 3
Output
9
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