add: 220613 [cpp]

cpp/2206/220613.cpp

@@ -0,0 +1,34 @@
+#include <vector>
+#include <algorithm>
+#include <iostream>
+
+/**
+ * 120. Triangle
+ * Given a triangle array, return the minimum path sum from top to bottom.
+ * For each step, you may move to an adjacent number of the row below. More formally, if you are on index i on the current row, you may move to either index i or index i + 1 on the next row.
+ */
+
+class Solution {
+public:
+	static int minimumTotal(std::vector<std::vector<int>>& triangle) {
+		const int m = triangle.size();
+		for (int i = 1; i < m; ++i) {
+			auto& t = triangle[i];
+			const auto& p = triangle[i - 1];
+			const int n = t.size();
+			t[0] += p[0];
+			for (int j = 1; j < n - 1; ++j) {
+				t[j] += std::min(p[j - 1], p[j]);
+			}
+			t[n - 1] += p[n - 2];
+		}
+		return *std::min_element(triangle.back().begin(), triangle.back().end());
+	}
+};
+
+int main() {
+	std::vector<std::vector<int>> a {{2}, {3, 4}, {6, 5, 7}, {4, 1, 8, 3}};
+	std::cout << Solution::minimumTotal(a);
+
+	return 0;
+}

cpp/2206/CMakeLists.txt

@@ -3,4 +3,4 @@ PROJECT(2206)
 
 SET(CMAKE_CXX_STANDARD 23)
 
-ADD_EXECUTABLE(2206 220613-CN.cpp)
+ADD_EXECUTABLE(2206 220613.cpp)