diff --git a/src/countcities.ts b/src/countcities.ts
new file mode 100644
index 0000000..c2bda15
--- /dev/null
+++ b/src/countcities.ts
@@ -0,0 +1,34 @@
+import rawData from "https://didier-ahuntsic.gitlab.io/cours-420-317-ah/data/cities.json" assert {type: "json"};
+
+type CityWithCount = [string, number]
+
+function countOccurrences(cities: string[]): Map<string,number> {
+    let ret = new Map<string, number>();
+    for(const city of cities) {
+        ret.set(city, (ret.get(city) ?? 0) + 1)
+    }
+    return ret;
+}
+
+function maxOccurrence(occurrences: Map<string, number>): CityWithCount {
+    let maxOccurrenceName = "";
+    let maxOccurrenceValue = 0;
+    for(const [name, value] of occurrences.entries()){
+        if(value > maxOccurrenceValue){
+            maxOccurrenceName = name;
+            maxOccurrenceValue = value;
+        }
+    }
+    return [maxOccurrenceName, maxOccurrenceValue];
+}
+
+
+function getMostListedCity(cities: string[]): CityWithCount{
+    const occurrences: Map<string, number> = countOccurrences(cities);
+    return maxOccurrence(occurrences);
+}
+
+console.log(getMostListedCity(rawData as string[]));
+
+
+