diff --git a/src/brackets/index.js b/src/brackets/index.js
index 96b6766..d86d81c 100644
--- a/src/brackets/index.js
+++ b/src/brackets/index.js
@@ -4,6 +4,33 @@
  * @param {string} str The string of brackets.
  * @returns {"valid" | "invalid"} Whether or not the string is valid.
  */
-function isValid(str) {}
+function chechBracket(str){
+    let bracket = [];
+    let opening = '({[';
+    let closing = ')}]';
+    let matching = {
+        ')': '(',
+        '}': '{',
+        ']': '['
+    };
 
-module.exports = isValid;
+    for(let i = 0; i < str.length; i++){
+        console.log(str[i])
+        if(opening.includes(str[i])){
+            bracket.push(str[i]);
+        } else if(closing.includes(str[i])){
+            const lastBracket = bracket.pop();
+
+            if(matching[str[i]] != lastBracket){
+                return "invalid";
+            }
+        }
+        
+    }
+    if(bracket.length == 0){
+        return "valid"
+    } else{
+        return "invalid";
+    }
+}
+console.log(chechBracket("()()()()()"));
\ No newline at end of file
diff --git a/src/roman-numerals/index.js b/src/roman-numerals/index.js
index 38afb19..4e56e62 100644
--- a/src/roman-numerals/index.js
+++ b/src/roman-numerals/index.js
@@ -4,6 +4,34 @@
  * @param {string} roman The all-caps Roman numeral between 1 and 3999 (inclusive).
  * @returns {number} The decimal equivalent.
  */
-function romanToDecimal(roman) {}
+function Numerals(roman){
+    let numeral = {
+        I: 1,
+        V: 5,
+        X: 10,
+        L: 50,
+        C: 100,
+        D: 500,
+        M: 1000
 
-module.exports = romanToDecimal;
+    };
+
+    let result = 0;
+    for(let i = 0; i < roman.length; i++){
+
+        let curSym = numeral[roman[i]]
+        let nextSym = numeral[roman[i + 1]]
+
+        if( nextSym && nextSym > curSym){
+            result += nextSym - curSym
+            i++
+
+        }else{
+            result += curSym
+        }
+
+       
+    }
+   
+    return result;
+};
diff --git a/src/transpose/index.js b/src/transpose/index.js
index adec201..52e58e1 100644
--- a/src/transpose/index.js
+++ b/src/transpose/index.js
@@ -4,6 +4,11 @@
  * @param {number[]} array The array to transpose
  * @returns {number[]} The transposed array
  */
-function transpose(array) {}
 
-module.exports = transpose;
+
+function transpose(arr) {
+    
+    let newArr = arr[0].map((item, index) => arr.map(cur => cur[index]))
+    return newArr;
+
+}
\ No newline at end of file