diff --git a/package-lock.json b/package-lock.json
index d218146..fab8ea6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3388,9 +3388,9 @@
       }
     },
     "node_modules/jest-snapshot/node_modules/semver": {
-      "version": "7.3.7",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.7.tgz",
-      "integrity": "sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==",
+      "version": "7.5.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
+      "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
       "dev": true,
       "dependencies": {
         "lru-cache": "^6.0.0"
@@ -3781,9 +3781,9 @@
       "dev": true
     },
     "node_modules/json5": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.1.tgz",
-      "integrity": "sha512-1hqLFMSrGHRHxav9q9gNjJ5EXznIxGVO09xQRrwplcS8qs28pZ8s8hupZAmqDwZUmVZ2Qb2jnyPOWcDH8m8dlA==",
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
       "dev": true,
       "bin": {
         "json5": "lib/cli.js"
@@ -4250,9 +4250,9 @@
       "dev": true
     },
     "node_modules/semver": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
-      "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
+      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
       "dev": true,
       "bin": {
         "semver": "bin/semver.js"
@@ -4555,9 +4555,9 @@
       }
     },
     "node_modules/ts-jest/node_modules/semver": {
-      "version": "7.3.7",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.7.tgz",
-      "integrity": "sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==",
+      "version": "7.5.4",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
+      "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
       "dev": true,
       "dependencies": {
         "lru-cache": "^6.0.0"
@@ -7463,9 +7463,9 @@
           "dev": true
         },
         "semver": {
-          "version": "7.3.7",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.7.tgz",
-          "integrity": "sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==",
+          "version": "7.5.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
+          "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
           "dev": true,
           "requires": {
             "lru-cache": "^6.0.0"
@@ -7712,9 +7712,9 @@
       "dev": true
     },
     "json5": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.1.tgz",
-      "integrity": "sha512-1hqLFMSrGHRHxav9q9gNjJ5EXznIxGVO09xQRrwplcS8qs28pZ8s8hupZAmqDwZUmVZ2Qb2jnyPOWcDH8m8dlA==",
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
       "dev": true
     },
     "kleur": {
@@ -8054,9 +8054,9 @@
       "dev": true
     },
     "semver": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
-      "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
+      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
       "dev": true
     },
     "shebang-command": {
@@ -8269,9 +8269,9 @@
       },
       "dependencies": {
         "semver": {
-          "version": "7.3.7",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.3.7.tgz",
-          "integrity": "sha512-QlYTucUYOews+WeEujDoEGziz4K6c47V/Bd+LjSSYcA94p+DmINdf7ncaUinThfvZyu13lN9OY1XDxt8C0Tw0g==",
+          "version": "7.5.4",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.4.tgz",
+          "integrity": "sha512-1bCSESV6Pv+i21Hvpxp3Dx+pSD8lIPt8uVjRrxAUt/nbswYc+tK6Y2btiULjd4+fnq15PX+nqQDC7Oft7WkwcA==",
           "dev": true,
           "requires": {
             "lru-cache": "^6.0.0"
diff --git a/src/brackets/index.js b/src/brackets/index.js
index 96b6766..dd62f96 100644
--- a/src/brackets/index.js
+++ b/src/brackets/index.js
@@ -4,6 +4,30 @@
  * @param {string} str The string of brackets.
  * @returns {"valid" | "invalid"} Whether or not the string is valid.
  */
-function isValid(str) {}
+function isValid(str) {
+    let stack = []
+    for(let i in str){
+        let x = stack.length -1
+        if(str[i]=='(' || str[i]=='{' || str[i]=='['){
+            stack.push(str[i])
+        }
+        else{
+        if(str[i]==')' && stack[x]== '('){
+            stack.pop()
+        }
+        else if(str[i]=='}' && stack[x]== '{'){
+            stack.pop()
+        }
+        else if(str[i]==']' && stack[x]=='['){
+            stack.pop()
+        }
+        else{
+            return 'invalid'
+        }
+        
+        }
+    }
+    return stack.length > 0 ? 'invalid' : 'valid'
+}
 
 module.exports = isValid;
diff --git a/src/roman-numerals/index.js b/src/roman-numerals/index.js
index 38afb19..4ce972e 100644
--- a/src/roman-numerals/index.js
+++ b/src/roman-numerals/index.js
@@ -4,6 +4,36 @@
  * @param {string} roman The all-caps Roman numeral between 1 and 3999 (inclusive).
  * @returns {number} The decimal equivalent.
  */
-function romanToDecimal(roman) {}
+function romanToDecimal(roman) {
+    let stack = []
+    let total = 0
+    for (let i in roman){
+        let num = 0
+        if(roman[i] == 'I'){num = 1}
+        else if(roman[i] == 'V'){num = 5}
+        else if(roman[i] == 'X'){num = 10}
+        else if(roman[i] == 'L'){num = 50}
+        else if(roman[i] == 'C'){num = 100}
+        else if(roman[i] == 'D'){num = 500}
+        else if(roman[i] == 'M'){num = 1000}
+        let x = stack.length - 1
+        if(stack.length == 0){
+            total += num
+            stack.push(num)
+        }
+        else if (num > stack[x]){
+            let dec = num - stack[x]
+            total += dec
+            total -= stack[x]
+            stack[x] = dec
+        }
+        else{
+            total += num
+            stack.push(num)
+        }
+    }
+    return total
+}
+
 
 module.exports = romanToDecimal;
diff --git a/src/transpose/index.js b/src/transpose/index.js
index adec201..1e2e3e2 100644
--- a/src/transpose/index.js
+++ b/src/transpose/index.js
@@ -4,6 +4,17 @@
  * @param {number[]} array The array to transpose
  * @returns {number[]} The transposed array
  */
-function transpose(array) {}
+function transpose(array) {
+    let newArr = [];
+    for(let i in array[0]){
+        newArr.push(Array(array.length))
+    }
+    for(let i in array){
+        for(let j in array[i]){
+            newArr[j][i] = array[i][j]
+        }
+    }
+    return newArr
+}
 
 module.exports = transpose;