LineOperations

//
let input = ['4 3',1,2,3,4, '4,1,5,2' ,'110','742'];

let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);
//

let nm = gets().split(' ').map(Number); // index1 = first number N
                            // index2 = second number M


// program starts

let temp = [];
let newArr = [];
for(let i = 0; i < (nm[0]); i++){
    let inSystem = +gets(); // 1 2 3 4

    for(let j = inSystem; j < inSystem + nm[1]; j++ ){
        temp.push(j);

        if(j+1 >= inSystem + nm[1]){

            newArr.push(temp);
            temp=[];
        }
    }
}

let result = 0;
for(let k = 0; k < newArr.length; k++){

    if(k % 3 == 0) {
        let min = Math.min(...newArr[k]);

        result += min;

    } else if (k % 3 == 1) {
        let max = Math.max(...newArr[k]);

        result += max;

    } else if (k % 3 == 2) {
        const reducer = (previousValue, currentValue) => previousValue + currentValue;
        let avrg = Math.floor(newArr[k].reduce(reducer) / newArr[k].length);

        result+= avrg;

    }
}
print(result);