completed day 1

1/puzzle1p2.cpp

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <list>
+#include <iostream>
+#include <fstream>
+#include <unordered_map>
+
+using namespace std;
+
+list<int> listOne{};
+list<int> listTwo{};
+
+unordered_map<int, int> listTwoMap;
+
+int simscore = 0;
+
+int main(){
+
+    ifstream puzzle("input.txt");
+
+    int tempOne, tempTwo;
+
+    while (puzzle >> tempOne >> tempTwo)
+    {
+        listOne.push_back(tempOne);
+        listTwo.push_back(tempTwo);
+    }
+
+    puzzle.close();
+
+    for (int num:listTwo){
+        listTwoMap[num]++;
+    }
+
+        for (int listOneItem = 0; !listOne.empty(); listOneItem= listOne.front()) {
+            if(listTwoMap.contains(listOneItem)){
+                simscore += listOneItem * listTwoMap[listOneItem];
+            }
+
+            listOne.pop_front();
+        }
+
+    printf("total simularity: %i\n", simscore);
+}