completed day 1

.vscode/tasks.json

@@ -5,6 +5,8 @@
             "label": "C/C++: gcc build active file",
             "command": "/usr/bin/g++",
             "args": [
+                "--std",
+                "gnu++23",
                 "-fdiagnostics-color=always",
                 "-g",
                 "${file}",
@@ -28,6 +30,8 @@
             "label": "C/C++: g++ build active file",
             "command": "/usr/bin/g++",
             "args": [
+                "--std",
+                "gnu++23",
                 "-fdiagnostics-color=always",
                 "-g",
                 "${file}",

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);
+}