Initial data commit

Task/Longest-common-substring/Swift/longest-common-substring-1.swift

@@ -0,0 +1,27 @@
+func lComSubStr<
+  S0: Sliceable, S1: Sliceable, T: Equatable where
+  S0.Generator.Element == T, S1.Generator.Element == T,
+  S0.Index.Distance == Int, S1.Index.Distance == Int
+  >(w1: S0, _ w2: S1) -> S0.SubSlice {
+
+    var (len, end) = (0, 0)
+
+    let empty = Array(Repeat(count: w2.count + 1, repeatedValue: 0))
+    var mat: [[Int]] = Array(Repeat(count: w1.count + 1, repeatedValue: empty))
+
+    for (i, sLett) in w1.enumerate() {
+      for (j, tLett) in w2.enumerate() where tLett == sLett {
+        let curLen = mat[i][j] + 1
+        mat[i + 1][j + 1] = curLen
+        if curLen > len {
+          len = curLen
+          end = i
+        }
+      }
+    }
+    return w1[advance(w1.startIndex, (end + 1) - len)...advance(w1.startIndex, end)]
+}
+
+func lComSubStr(w1: String, _ w2: String) -> String {
+  return String(lComSubStr(w1.characters, w2.characters))
+}

Task/Longest-common-substring/Swift/longest-common-substring-2.swift

@@ -0,0 +1 @@
+lComSubStr("thisisatest", "testing123testing") // "test"