diff --git a/app/data/zadanie01/sum.txt b/app/data/zadanie01/sum.txt
index e69de29..615088b 100644
--- a/app/data/zadanie01/sum.txt
+++ b/app/data/zadanie01/sum.txt
@@ -0,0 +1 @@
+108
\ No newline at end of file
diff --git a/app/data/zadanieDnia/test.txt b/app/data/zadanieDnia/test.txt
index 47c17e3..7a82b9b 100644
--- a/app/data/zadanieDnia/test.txt
+++ b/app/data/zadanieDnia/test.txt
@@ -1,7 +1,7 @@
-You Don't Know JS: ES6 & Beyond
-Foreword
+YoU DoN'T KnOw JS: ES6 & BEyOnD
+FoReWoRd
 
-Kyle Simpson is a thorough pragmatist.
+KyLe SImPsOn iS A ThOrOuGh pRaGmAtIsT.
 
-I can't think of higher praise than this. To me, these are two of the most important qualities that a software developer must have. That's right: must, not should. Kyle's keen ability to tease apart layers of the JavaScript programming language and present them in understandable and meaningful portions is second to none.
-[https://github.com/getify/You-Dont-Know-JS/blob/master/es6%20%26%20beyond/foreword.md]
\ No newline at end of file
+I CaN'T ThInK Of hIgHeR PrAiSe tHaN ThIs. To mE, tHeSe aRe tWo oF ThE MoSt iMpOrTaNt qUaLiTiEs tHaT A SoFtWaRe dEvElOpEr mUsT HaVe. ThAt's rIgHt: MuSt, NoT ShOuLd. KyLe's kEeN AbIlItY To tEaSe aPaRt lAyErS Of tHe JAvASCrIpT PrOgRaMmInG LaNgUaGe aNd pReSeNt tHeM In uNdErStAnDaBlE AnD MeAnInGfUl pOrTiOnS Is sEcOnD To nOnE.
+[HtTpS://GiThUb.cOm/gEtIfY/YoU-DoNt-KNoW-JS/bLoB/MaStEr/eS6%20%26%20bEyOnD/FoReWoRd.mD]
\ No newline at end of file
diff --git a/app/zadanie01.js b/app/zadanie01.js
index 8c20173..c95e494 100644
--- a/app/zadanie01.js
+++ b/app/zadanie01.js
@@ -1 +1,38 @@
-//Twój kod
\ No newline at end of file
+const fs = require('fs');
+
+let read = () => {
+
+    return new Promise((resolve, reject) => {
+
+    fs.readFile('./data/zadanie01/input.json', 'utf-8', (err, data) => {        
+            if (err){
+                throw err;
+            } else {
+                resolve(data);    
+            }
+        });
+    });
+}
+
+let sum = (data) => {
+
+        let dataArr = JSON.parse(data);
+        let sum = 0;
+        
+        for(index in dataArr){ 
+            sum += dataArr[index] 
+        }
+        return sum;
+}
+
+let write = (sum) => {
+
+    fs.writeFile('./data/zadanie01/sum.txt', sum, (err) => {
+        if (err) throw err;
+    });
+
+}
+
+read()
+.then((data) => { return sum(data) })
+.then((sum) => { write(sum) } );
diff --git a/app/zadanie02.js b/app/zadanie02.js
index 8c20173..4a611b3 100644
--- a/app/zadanie02.js
+++ b/app/zadanie02.js
@@ -1 +1,38 @@
-//Twój kod
\ No newline at end of file
+const fs = require('fs');
+
+let read = () => {
+
+    return new Promise((resolve, reject) => {
+
+        fs.readdir('./data/zadanie02/', (err, files) => {
+            if (err === null){
+                resolve(files)
+            } else {
+                throw err;
+            }
+        });
+    });    
+}
+
+let content = (files) => {
+        files.forEach(file => {
+            getContent(file);
+        });
+}
+
+let getContent = (file) => {
+
+    let fileDir = `./data/zadanie02/${file}`
+
+    fs.readFile(fileDir, 'utf-8', (err, data) => {        
+        if (err){
+            throw err;
+        } else {
+            console.log(data); 
+        }
+    });
+
+}
+
+read().then((data) => { content(data) })
+
diff --git a/app/zadanieDnia.js b/app/zadanieDnia.js
index 8c20173..de16184 100644
--- a/app/zadanieDnia.js
+++ b/app/zadanieDnia.js
@@ -1 +1,52 @@
-//Twój kod
\ No newline at end of file
+const fs = require('fs');
+
+let read = (filePath) => {
+
+    return new Promise((resolve, reject) => {
+
+        fs.readFile(filePath, 'utf-8', (err, data) => {
+            if (err === null){
+                resolve(data)
+            } else {
+                throw err;
+            }
+        });
+    });    
+}
+
+let camelWords = (text) => {
+
+    let allText = '';
+
+    for(letter in text){
+        if(letter % 2 === 0){
+            allText += text[letter].toUpperCase();
+        } else {
+            allText += text[letter];
+        }
+    }
+
+    return allText;
+}
+
+let saveText = (filePath, text) => {
+
+    fs.writeFile(filePath, text, (err) => {
+        if (err) throw err;
+    });
+
+}
+
+let filePath = '';
+
+process.argv.forEach((val, index) => {
+    
+    if(index === 2){
+        filePath = val;
+
+        read(filePath)
+        .then((data) => { return camelWords(data) } )
+        .then((text) => { saveText(filePath, text) } );
+    };
+    
+});
\ No newline at end of file