Genetics

Input
//
// 11111
// 3
// Output
//

// let input = [
//     '00000',
//     '11111',
//     '3'
// ]; //11100
// ________________________________________
// let input = [
//     '11111',
//     '10101',
//     '3'
// ]; //11101
// ________________________________________
// let input = [
//     '10010',
//     '10101',
//     '3'
// ]; // 10110
// ________________________________________
let input = [
    '00000',
    '10001',
    '3'
]; //out:10010..mutation (flipping bits) 11100


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


let parent1 = gets().split('');
let parent2 = gets().split('');
let splitPoint = gets();
let parentLenth = Number(parent1.length); //Both parents have the same length
let result = '';

let child1 = (parent1.slice(0, splitPoint) + ',' + parent2.slice(splitPoint)).split(',');
let child2 = (parent2.slice(0, splitPoint) + ',' + parent1.slice(splitPoint)).split(',');
let child1OneNumbers = 0;
let child2OneNumbers = 0;

for (let i = 0; i <= parentLenth; i++) {
    if (child1[i] === '1') {
        child1OneNumbers++
    }
    if (child2[i] === '1') {
        child2OneNumbers++
    }
}

let fitnessLevelChild1 = child1OneNumbers / parentLenth;
let fitnessLevelChild2 = child2OneNumbers / parentLenth;

if (fitnessLevelChild1 < 0.5 && fitnessLevelChild2 < 0.5) {
    for (let j = 0; j < parentLenth; j++) {
        if (child1[j] === '0') {
            child1[j] = 1
        }
        if (child1[j] === '1') {
            child1[j] = 0
        }
        if (child2[j] === '0') {
            child2[j] = 1
        }
        if (child2[j] === '1') {
            child2[j] = 0
        }
    }
    if (fitnessLevelChild1 === fitnessLevelChild2) {
        result = child1.join('') + ' - ' + "child1"
    } else if (fitnessLevelChild1 > fitnessLevelChild2) {
        result = child1.join('') + ' - ' + "child1"
    } else {
        result = child2.join('') + ' - ' + "child2"
    }

} else if (fitnessLevelChild1 > fitnessLevelChild2) {
    result = child1.join('') + ' - ' + "child1";
} else if (fitnessLevelChild1 < fitnessLevelChild2) {
    result = child2.join('') + ' - ' + "child2";
} else if (fitnessLevelChild1 === fitnessLevelChild2) {
    result = child1.join('') + ' - ' + "child1(много грешна работа, да оставим от 2 деца //same fitnessLevels// само 1-вото)";
}

console.log(result);