Started 2024 + day 1

1 files changed, 21 insertions, 0 deletions

diff --git a/2024/01/day01b.cpp b/2024/01/day01b.cpp
new file mode 100644
index 0000000..91ef0db
--- /dev/null
+++ b/2024/01/day01b.cpp
@@ -0,0 +1,21 @@
+#include <iostream>
+#include <algorithm>
+#include <vector>
+using namespace std;
+
+int main() {
+        int x, y, tot;
+        vector<int> v, w;
+
+        while (cin >> x >> y) {
+                v.push_back(x);
+                w.push_back(y);
+        }
+
+        tot = 0;
+        for (unsigned i = 0; i < v.size(); i++)
+                tot += v[i] * count(w.begin(), w.end(), v[i]);
+
+        cout << tot << endl;
+        return 0;
+}