diff --git a/Problem1.hs b/Problem001.hs
similarity index 100%
rename from Problem1.hs
rename to Problem001.hs
diff --git a/Problem2.hs b/Problem002.hs
similarity index 100%
rename from Problem2.hs
rename to Problem002.hs
diff --git a/Problem3.hs b/Problem003.hs
similarity index 100%
rename from Problem3.hs
rename to Problem003.hs
diff --git a/Problem4.hs b/Problem004.hs
similarity index 100%
rename from Problem4.hs
rename to Problem004.hs
diff --git a/Problem5.hs b/Problem005.hs
similarity index 100%
rename from Problem5.hs
rename to Problem005.hs
diff --git a/Problem6.hs b/Problem006.hs
similarity index 100%
rename from Problem6.hs
rename to Problem006.hs
diff --git a/Problem7.hs b/Problem007.hs
similarity index 100%
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rename to Problem007.hs
diff --git a/Problem8.hs b/Problem008.hs
similarity index 100%
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diff --git a/Problem9.hs b/Problem009.hs
similarity index 100%
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diff --git a/Problem10.hs b/Problem010.hs
similarity index 100%
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diff --git a/Problem11.hs b/Problem011.hs
similarity index 100%
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rename to Problem011.hs
diff --git a/Problem12.hs b/Problem012.hs
similarity index 100%
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diff --git a/Problem13.hs b/Problem013.hs
similarity index 100%
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diff --git a/Problem14.hs b/Problem014.hs
similarity index 100%
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diff --git a/Problem15.hs b/Problem015.hs
similarity index 100%
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diff --git a/Problem16.hs b/Problem016.hs
similarity index 100%
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rename to Problem016.hs
diff --git a/Problem17.hs b/Problem017.hs
similarity index 100%
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diff --git a/Problem18.hs b/Problem018.hs
similarity index 100%
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diff --git a/Problem19.hs b/Problem019.hs
similarity index 100%
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diff --git a/Problem20.hs b/Problem020.hs
similarity index 100%
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diff --git a/Problem21.hs b/Problem021.hs
similarity index 100%
rename from Problem21.hs
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diff --git a/Problem22.hs b/Problem022.hs
similarity index 100%
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diff --git a/Problem23.hs b/Problem023.hs
similarity index 100%
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diff --git a/Problem24.hs b/Problem024.hs
similarity index 100%
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diff --git a/Problem25.hs b/Problem025.hs
similarity index 100%
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diff --git a/Problem26.hs b/Problem026.hs
similarity index 100%
rename from Problem26.hs
rename to Problem026.hs