java: add «1750. Minimum Length of String After Deleting Similar Ends»

Signed-off-by: Matej Focko <mfocko@redhat.com>

java/minimum-length-of-string-after-deleting-similar-ends.java

@@ -0,0 +1,20 @@
+class Solution {
+  public int minimumLength(String s) {
+    int i = 0;
+    int j = s.length() - 1;
+
+    while (i < j && s.charAt(i) == s.charAt(j)) {
+      var c = s.charAt(i);
+
+      while (i <= j && s.charAt(i) == c) {
+        ++i;
+      }
+
+      while (j > i && s.charAt(j) == c) {
+        --j;
+      }
+    }
+
+    return j - i + 1;
+  }
+}