From 2daade49c0847484e1e55d2402739f6d818ddb7a Mon Sep 17 00:00:00 2001
From: Matej Focko <me@mfocko.xyz>
Date: Wed, 3 Jan 2024 12:05:21 +0100
Subject: [PATCH] =?UTF-8?q?cpp:=20add=20=E2=80=9C2125.=20Number=20of=20Las?=
 =?UTF-8?q?er=20Beams=20in=20a=20Bank=E2=80=9D?=
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Signed-off-by: Matej Focko <me@mfocko.xyz>
---
 cpp/number-of-laser-beams-in-a-bank.cpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 cpp/number-of-laser-beams-in-a-bank.cpp

diff --git a/cpp/number-of-laser-beams-in-a-bank.cpp b/cpp/number-of-laser-beams-in-a-bank.cpp
new file mode 100644
index 0000000..c9bebc2
--- /dev/null
+++ b/cpp/number-of-laser-beams-in-a-bank.cpp
@@ -0,0 +1,21 @@
+#include <algorithm>
+#include <string>
+#include <vector>
+
+class Solution {
+public:
+    int numberOfBeams(const std::vector<std::string>& bank) {
+        int beams = 0;
+
+        int last_row = 0;
+        for (const auto& row : bank) {
+            if (auto current_row = std::count(row.begin(), row.end(), '1'); current_row != 0) {
+                beams += last_row * current_row;
+                last_row = current_row;
+            }
+        }
+
+        return beams;
+    }
+};
+