routine

25/11/go/3531.go

@@ -0,0 +1,25 @@
+package L12
+
+import "math"
+
+func countCoveredBuildings(n int, buildings [][]int) int {
+	ans, minX, maxX, minY, maxY := 0, make([]int, n+1), make([]int, n+1), make([]int, n+1), make([]int, n+1)
+	for i := range minX {
+		minX[i], minY[i], maxX[i], maxY[i] = math.MaxInt, math.MaxInt, math.MinInt, math.MinInt
+	}
+
+	for _, building := range buildings {
+		x := building[0]
+		y := building[1]
+		minX[y], maxX[y], minY[x], maxY[x] = min(minX[y], x), max(maxX[y], x), min(minY[x], y), max(maxY[x], y)
+	}
+
+	for _, building := range buildings {
+		x := building[0]
+		y := building[1]
+		if x < maxX[y] && x > minX[y] && y < maxY[x] && y > minY[x] {
+			ans++
+		}
+	}
+	return ans
+}