add: 220215-CN [golang]

2202/220215-CN.go

@@ -0,0 +1,48 @@
+package main
+
+import "fmt"
+
+func luckyNumbers(matrix [][]int) []int {
+	m, n := len(matrix), len(matrix[0])
+
+	rowMin := make([]int, m)
+	colMax := make([]int, n)
+
+	for i := 0; i < m; i++ {
+		rowMin[i] = 0x7FFFFFFF
+		for j := 0; j < n; j++ {
+			if matrix[i][j] < rowMin[i] {
+				rowMin[i] = matrix[i][j]
+			}
+		}
+	}
+
+	for j := 0; j < n; j++ {
+		colMax[j] = -0x7FFFFFFF
+		for i := 0; i < m; i++ {
+			if matrix[i][j] > colMax[j] {
+				colMax[j] = matrix[i][j]
+			}
+		}
+	}
+
+	ret := make([]int, 0)
+	for i := 0; i < m; i++ {
+		for j := 0; j < n; j++ {
+			if matrix[i][j] == rowMin[i] && matrix[i][j] == colMax[j] {
+				ret = append(ret, matrix[i][j])
+			}
+		}
+	}
+
+	return ret
+}
+
+func main() {
+	args := [][]int{
+		{3, 7, 8},
+		{9, 11, 13},
+		{15, 16, 17},
+	}
+	fmt.Println(luckyNumbers(args))
+}