Can we replace the for loops with reduce?

applesandoranges.swift

func countApplesAndOranges(s: Int, t: Int, a: Int, b: Int, apples: [Int], oranges: [Int]) -> Void {
    
    var numA = 0
    var numO = 0
    
    for ap in apples{
        if(ap+a) >= s{
            numA += 1
        }
    }
    
    for or in oranges{
        if(or+b) <= t{
            numO += 1
        }
    }
    
   //reduce!
   numA = apples.reduce(0){acc, elem in 
        if (elem+a) >= s{
            return acc + 1
        }
        return acc
    }
    
    numO = oranges.reduce(0){acc, elem in
        if (elem+b) <= t{
            return acc + 1
        }
        return acc
    }
    
    //filter!    
    numA = apples.filter{elem in
        (elem+a) >= s
    }.count
    
    numO = oranges.filter{elem in
        (elem+b) <= t
    }.count

    print(numA)
    print(numO)

}