diff --git a/project_euler/Problem 01/sol1.c b/project_euler/problem_1/sol1.c similarity index 100% rename from project_euler/Problem 01/sol1.c rename to project_euler/problem_1/sol1.c diff --git a/project_euler/Problem 01/sol2.c b/project_euler/problem_1/sol2.c similarity index 100% rename from project_euler/Problem 01/sol2.c rename to project_euler/problem_1/sol2.c diff --git a/project_euler/Problem 01/sol3.c b/project_euler/problem_1/sol3.c similarity index 100% rename from project_euler/Problem 01/sol3.c rename to project_euler/problem_1/sol3.c diff --git a/project_euler/Problem 01/sol4.c b/project_euler/problem_1/sol4.c similarity index 100% rename from project_euler/Problem 01/sol4.c rename to project_euler/problem_1/sol4.c diff --git a/project_euler/Problem 10/sol1.c b/project_euler/problem_10/sol1.c similarity index 100% rename from project_euler/Problem 10/sol1.c rename to project_euler/problem_10/sol1.c diff --git a/project_euler/Problem 10/sol2.c b/project_euler/problem_10/sol2.c similarity index 100% rename from project_euler/Problem 10/sol2.c rename to project_euler/problem_10/sol2.c diff --git a/project_euler/Problem 12/sol1.c b/project_euler/problem_12/sol1.c similarity index 100% rename from project_euler/Problem 12/sol1.c rename to project_euler/problem_12/sol1.c diff --git a/project_euler/Problem 13/num.txt b/project_euler/problem_13/num.txt similarity index 100% rename from project_euler/Problem 13/num.txt rename to project_euler/problem_13/num.txt diff --git a/project_euler/Problem 13/sol1.c b/project_euler/problem_13/sol1.c similarity index 100% rename from project_euler/Problem 13/sol1.c rename to project_euler/problem_13/sol1.c diff --git a/project_euler/Problem 14/sol1.c b/project_euler/problem_14/sol1.c similarity index 100% rename from project_euler/Problem 14/sol1.c rename to project_euler/problem_14/sol1.c diff --git a/project_euler/Problem 15/sol1.c b/project_euler/problem_15/sol1.c similarity index 100% rename from project_euler/Problem 15/sol1.c rename to project_euler/problem_15/sol1.c diff --git a/project_euler/Problem 16/sol1.c b/project_euler/problem_16/sol1.c similarity index 100% rename from project_euler/Problem 16/sol1.c rename to project_euler/problem_16/sol1.c diff --git a/project_euler/Problem 19/sol1.c b/project_euler/problem_19/sol1.c similarity index 100% rename from project_euler/Problem 19/sol1.c rename to project_euler/problem_19/sol1.c diff --git a/project_euler/Problem 02/so1.c b/project_euler/problem_2/so1.c similarity index 100% rename from project_euler/Problem 02/so1.c rename to project_euler/problem_2/so1.c diff --git a/project_euler/Problem 20/sol1.c b/project_euler/problem_20/sol1.c similarity index 100% rename from project_euler/Problem 20/sol1.c rename to project_euler/problem_20/sol1.c diff --git a/project_euler/Problem 21/sol1.c b/project_euler/problem_21/sol1.c similarity index 100% rename from project_euler/Problem 21/sol1.c rename to project_euler/problem_21/sol1.c diff --git a/project_euler/Problem 22/names.txt b/project_euler/problem_22/names.txt similarity index 100% rename from project_euler/Problem 22/names.txt rename to project_euler/problem_22/names.txt diff --git a/project_euler/Problem 22/sol1.c b/project_euler/problem_22/sol1.c similarity index 100% rename from project_euler/Problem 22/sol1.c rename to project_euler/problem_22/sol1.c diff --git a/project_euler/Problem 23/sol1.c b/project_euler/problem_23/sol1.c similarity index 100% rename from project_euler/Problem 23/sol1.c rename to project_euler/problem_23/sol1.c diff --git a/project_euler/Problem 23/sol2.c b/project_euler/problem_23/sol2.c similarity index 100% rename from project_euler/Problem 23/sol2.c rename to project_euler/problem_23/sol2.c diff --git a/project_euler/Problem 24/sol1 b/project_euler/problem_24/sol1 similarity index 100% rename from project_euler/Problem 24/sol1 rename to project_euler/problem_24/sol1 diff --git a/project_euler/Problem 25/sol1.c b/project_euler/problem_25/sol1.c similarity index 100% rename from project_euler/Problem 25/sol1.c rename to project_euler/problem_25/sol1.c diff --git a/project_euler/Problem 26/sol1.c b/project_euler/problem_26/sol1.c similarity index 100% rename from project_euler/Problem 26/sol1.c rename to project_euler/problem_26/sol1.c diff --git a/project_euler/Problem 03/sol1.c b/project_euler/problem_3/sol1.c similarity index 100% rename from project_euler/Problem 03/sol1.c rename to project_euler/problem_3/sol1.c diff --git a/project_euler/Problem 03/sol2.c b/project_euler/problem_3/sol2.c similarity index 100% rename from project_euler/Problem 03/sol2.c rename to project_euler/problem_3/sol2.c diff --git a/project_euler/Problem 04/sol.c b/project_euler/problem_4/sol.c similarity index 100% rename from project_euler/Problem 04/sol.c rename to project_euler/problem_4/sol.c diff --git a/project_euler/Problem 401/sol1.c b/project_euler/problem_401/sol1.c similarity index 100% rename from project_euler/Problem 401/sol1.c rename to project_euler/problem_401/sol1.c diff --git a/project_euler/Problem 05/sol.c b/project_euler/problem_5/sol.c similarity index 100% rename from project_euler/Problem 05/sol.c rename to project_euler/problem_5/sol.c diff --git a/project_euler/Problem 06/sol.c b/project_euler/problem_6/sol.c similarity index 100% rename from project_euler/Problem 06/sol.c rename to project_euler/problem_6/sol.c diff --git a/project_euler/Problem 07/sol.c b/project_euler/problem_7/sol.c similarity index 100% rename from project_euler/Problem 07/sol.c rename to project_euler/problem_7/sol.c diff --git a/project_euler/Problem 08/digits.txt b/project_euler/problem_8/digits.txt similarity index 100% rename from project_euler/Problem 08/digits.txt rename to project_euler/problem_8/digits.txt diff --git a/project_euler/Problem 08/sol1.c b/project_euler/problem_8/sol1.c similarity index 100% rename from project_euler/Problem 08/sol1.c rename to project_euler/problem_8/sol1.c diff --git a/project_euler/Problem 08/sol2.c b/project_euler/problem_8/sol2.c similarity index 100% rename from project_euler/Problem 08/sol2.c rename to project_euler/problem_8/sol2.c diff --git a/project_euler/Problem 09/sol1.c b/project_euler/problem_9/sol1.c similarity index 100% rename from project_euler/Problem 09/sol1.c rename to project_euler/problem_9/sol1.c diff --git a/project_euler/Problem 09/sol2.c b/project_euler/problem_9/sol2.c similarity index 100% rename from project_euler/Problem 09/sol2.c rename to project_euler/problem_9/sol2.c