add new solutions

solutions/0/q74/solution.go

@@ -0,0 +1,23 @@
+package q74
+
+func searchMatrix(matrix [][]int, target int) bool {
+	w, h := len(matrix[0]), len(matrix)
+	idx := func(i int) (int, int) { return i / w, i % w }
+
+	l, r := 0, w*h
+	for l < r {
+		m := (l + r) / 2
+		row, col := idx(m)
+		switch {
+		case matrix[row][col] == target:
+			return true
+		case matrix[row][col] < target:
+			l = m + 1
+		default:
+			r = m
+		}
+	}
+	return false
+}
+
+var _ = searchMatrix