diff --git a/mainEx3.cpp b/mainEx3.cpp
deleted file mode 100644
index 94b606b..0000000
--- a/mainEx3.cpp
+++ /dev/null
@@ -1,52 +0,0 @@
-#include <iostream>
-#include <chrono>  
-using namespace std;
-using namespace std::chrono; 
-
-long long sumMultiplesLoop(int n) { // long long is like int but for big numbers 
-    long long sum = 0; 
-    for (int i = 1; i <= n; ++i) {
-        if (i % 3 == 0 || i % 5 == 0) {
-            sum += i;
-        }
-    }
-    return sum;
-}
-
-long long sumOfMultiples(int n, int k) { //known formula: k*m*(m+1)/2 for multiples of k leq n
-    long long m = n / k;            // how many multiples
-    return (long long)k * m * (m + 1) / 2;
-}
-
-// Formula version (no loop)
-long long sumMultiplesFormula(int n) {
-    return sumOfMultiples(n, 3) + sumOfMultiples(n, 5) - sumOfMultiples(n, 15); //subtract multiples of 15 because they count double
-}
-
-int main() {
-    int n = 1432987;
-
-    auto start1 = high_resolution_clock::now();   
-    long long result1 = 0;
-    for (int i = 0; i < 1000; ++i) {             
-        result1 = sumMultiplesLoop(n);
-    }
-    auto end1 = high_resolution_clock::now();    
-    duration<double> average1 = (end1 - start1) / 1000; 
-
-    auto start2 = high_resolution_clock::now();
-    long long result2 = 0;
-    for (int i = 0; i < 1000; ++i) {
-        result2 = sumMultiplesFormula(n);
-    }
-    auto end2 = high_resolution_clock::now();
-    duration<double> average2 = (end2 - start2) / 1000;
-    
-    cout << "Loop result: " << result1 << endl;
-    cout << "Loop average time: " << average1.count() << " seconds" << endl;
-    cout << "Formula result: " << result2 << endl;
-    cout << "Formula average time: " << average2.count() << " seconds" << endl;
-
-    return 0;
-}
-