added old solutions

.gitignore

@@ -0,0 +1 @@
+target/

hs/1.hs

@@ -0,0 +1,2 @@
+main = do
+    putStrLn (show (sum [x | x <- [1..999], x `mod` 3 == 0 || x `mod` 5 == 0]))

hs/5.hs

@@ -0,0 +1,6 @@
+divisible x y = x `mod` y == 0
+
+smallest x = if all (divisible x) [2..20] then x else smallest (succ x)
+
+main = do
+    print(smallest 1)

hs/6.hs

@@ -0,0 +1,2 @@
+main = do
+    print (sum [1..100] ^ 2 - sum [x ^ 2 | x <- [1..100]])

py/10.py

@@ -0,0 +1,2 @@
+import sympy 
+print(sum(filter(sympy.isprime,range(2000000))))

py/2.py

@@ -0,0 +1,9 @@
+last1 = 1
+last2 = 2
+res = 2
+while (last1 + last2 <= 4000000):
+    new = last1 + last2
+    res += (new if new%2 == 0 else 0)
+    last1 = last2
+    last2 = new
+print(res)

py/3.py

@@ -0,0 +1,11 @@
+from sympy.ntheory import isprime
+import math
+
+def primefactor(x):
+    res = 0
+    for i in range(2,math.ceil(math.sqrt(x))):
+        if(not isprime(i) or x%i != 0): continue
+        res = i
+    return res
+
+print(primefactor(600851475143))

py/4.py

@@ -0,0 +1,9 @@
+def palindromic(x):
+    return str(x) == str(x)[::-1]
+    
+maxi = 0
+for i in range(1,999):
+    for j in range(1,999):
+        if(palindromic(i*j)): maxi = max(maxi,(i*j))
+
+print(maxi)

py/7.py

@@ -0,0 +1 @@
+## zzz

py/8.py

@@ -0,0 +1,8 @@
+from functools import reduce
+
+val = list(map(int,list(str(7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450))))
+
+res = 0
+for i in range(len(val)-13):
+    res = max(res,reduce(lambda a,b: a*b,val[i:i+13]))
+print(res)

py/9.py

@@ -0,0 +1,6 @@
+for a in range(1,1000):
+    for i in range(1,a):
+        b = a+i
+        c = 1000-(a+b)
+        if(a**2+b**2 == c**2): 
+            print(a*b*c)

rs/Cargo.lock

@@ -0,0 +1,89 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "autocfg"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+
+[[package]]
+name = "matrixmultiply"
+version = "0.3.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06de3016e9fae57a36fd14dba131fccf49f74b40b7fbdb472f96e361ec71a08"
+dependencies = [
+ "autocfg",
+ "rawpointer",
+]
+
+[[package]]
+name = "ndarray"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "882ed72dce9365842bf196bdeedf5055305f11fc8c03dee7bb0194a6cad34841"
+dependencies = [
+ "matrixmultiply",
+ "num-complex",
+ "num-integer",
+ "num-traits",
+ "portable-atomic",
+ "portable-atomic-util",
+ "rawpointer",
+]
+
+[[package]]
+name = "num-complex"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "portable-atomic"
+version = "1.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f84267b20a16ea918e43c6a88433c2d54fa145c92a811b5b047ccbe153674483"
+
+[[package]]
+name = "portable-atomic-util"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8a2f0d8d040d7848a709caf78912debcc3f33ee4b3cac47d73d1e1069e83507"
+dependencies = [
+ "portable-atomic",
+]
+
+[[package]]
+name = "projecteuler"
+version = "0.1.0"
+dependencies = [
+ "ndarray",
+]
+
+[[package]]
+name = "rawpointer"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"

rs/Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "projecteuler"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+ndarray = "0.16.0"