Add practice problems to Long Arithmetics article (#174)

Morass · tcNickolas · commit 8e6b8afda4f3 · 2017-10-22T08:05:45.000-07:00
diff --git a/src/algebra/big-integer.md b/src/algebra/big-integer.md
@@ -185,3 +185,21 @@ The approach is very simple: a separate integer variable is used to store the va
 When two such numbers are multiplied or divided, their exponents should be added or subtracted, respectively. When numbers are added or subtracted, they have to be brought to common exponent first by multiplying one of them by 10 raised to the power equal to the difference of exponent values.
 
 As a final note, the exponent base doesn't have to equal 10. Based on the internal representation of floating-point numbers, it makes most sense to use 2 as the exponent base.
+
+## Practice Problems
+
+
+* [UVA - How Many Fibs?](https://uva.onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=1124)
+* [UVA - Product](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=1047)
+* [UVA - Maximum Sub-sequence Product](https://uva.onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=728)
+* [SPOJ - Fast Multiplication](http://www.spoj.com/problems/MUL/en/)
+* [SPOJ - GCD2](http://www.spoj.com/problems/GCD2/)
+* [UVA - Division](https://uva.onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=1024)
+* [UVA - Fibonacci Freeze](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=436)
+* [UVA - Krakovia](https://uva.onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=1866)
+* [UVA - Simplifying Fractions](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=1755)
+* [UVA - 500!](https://uva.onlinejudge.org/index.php?option=onlinejudge&page=show_problem&problem=564)
+* [Hackerrank - Factorial digit sum](https://www.hackerrank.com/contests/projecteuler/challenges/euler020/problem)
+* [UVA - Immortal Rabbits](https://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=4803)
+* [SPOJ - 0110SS](http://www.spoj.com/problems/IWGBS/)
+* [Codeforces - Notepad](http://codeforces.com/contest/17/problem/D)
