// 开心消消乐
    var m = 0  // 行
    var n = 0  // 列
    var strings: [[String]] = [] 
    func HW2023017() {
        // 测试用例
//        let nums = "3 3"
//        strings = [["1","0","1"], ["0","1","0"], ["1","0","1"]]
//        let nums = "4 4"
//        strings = [["1","1","0","0"], ["0","0","0","1"], ["0","0","1","1"], ["1","1","1","1"]]
        // 开始代码
        let nums = String(readLine()!)
        let numsArr = nums.components(separatedBy: " ").map { Int($0) ?? 0}
        while let line = readLine() {
            let num = line.components(separatedBy: " ")
            if num.count > 0 {
                strings.append(num)
            }
        }
        n = Int(numsArr.first!)
        m = Int(numsArr.last!)
        var res = 0
        for i in 0..<n {
            for j in 0..<m {
                if strings[i][j] == "1" {
                    strings[i][j] = "0"
                    // 回溯法处理数据更换问题
                    handleOnePadding(i, j)
                    res += 1
                }
            }
        }
        print(res)
    }
    func handleOnePadding(_ x: Int, _ y: Int) {
        if x > 0 {
            if strings[x-1][y] == "1" { // 上
                strings[x-1][y] = "0"
                handleOnePadding(x-1, y)
            }
            if y > 0 && strings[x-1][y-1] == "1"  {    // 左上
                strings[x-1][y-1] = "0"
                handleOnePadding(x-1, y-1)
            }
            if y < m-1 && strings[x-1][y+1] == "1" {  // 右上
                strings[x-1][y+1] = "0"
                handleOnePadding(x-1, y+1)
            }
        }
        if x < n-1 {
            if strings[x+1][y] == "1" { // 下
                strings[x+1][y] = "0"
                handleOnePadding(x+1, y)
            }
            if y > 0 && strings[x+1][y-1] == "1" {   // 左下
                strings[x+1][y-1] = "0"
                handleOnePadding(x+1, y-1)
            }
            if y < m-1 && strings[x+1][y+1] == "1" { // 右下
                strings[x+1][y+1] = "0"
                handleOnePadding(x+1, y+1)
            }
        }
        if y > 0 && strings[x][y-1] == "1" { // 左
            strings[x][y-1] = "0"
            handleOnePadding(x, y-1)
        }
        if y < m-1 && strings[x][y+1] == "1" { // 右
            strings[x][y+1] = "0"
            handleOnePadding(x, y+1)
        }
    }