updated the unaccessible problem link

itssachinkr · web-flow · commit 3363c3975033 · 2024-01-18T23:34:20.000+05:30
Codechef Problem is not available anymore, so added new similar problem link
diff --git a/src/algebra/euclid-algorithm.md b/src/algebra/euclid-algorithm.md
@@ -125,4 +125,4 @@ E.g. C++17 has such a function `std::gcd` in the `numeric` header.
 
 ## Practice Problems
 
-- [Codechef - GCD and LCM](https://www.codechef.com/problems/FLOW016)
+- [CSAcademy - Greatest Common Divisor](https://csacademy.com/contest/archive/task/gcd/)

Original file line number	Diff line number	Diff line change
@@ -125,4 +125,4 @@ E.g. C++17 has such a function `std::gcd` in the `numeric` header.
`125`	`125`
`126`	`126`	`## Practice Problems`
`127`	`127`
`128`		`-- [Codechef - GCD and LCM](https://www.codechef.com/problems/FLOW016)`
	`128`	`+- [CSAcademy - Greatest Common Divisor](https://csacademy.com/contest/archive/task/gcd/)`