12 Men Question

12-men-test.js

let allPeople = [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1];
let groupA = allPeople.slice(0, 4);
let groupB = allPeople.slice(4, 8);
let groupC = allPeople.slice(8, 12);

seeSawOne = weightDifference(groupA, groupB);

console.log("seeSawOne", seeSawOne);

if (seeSawOne === 0) {
  normalGroup = groupA;
  abnormalGroup = groupC;
} else if (seeSawOne < 0) {
  //A-B
  normalGroup = groupC;
  // Additional check to find out if GroupA are equal to GroupC
  abnormalGroup = arrayTotal(groupA) == arrayTotal(groupC) ? groupB : groupA;
} else {
  normalGroup = groupC;
  abnormalGroup = arrayTotal(groupB) == arrayTotal(groupC) ? groupA : groupB;
}

seeSawTwo = weightDifference(
  normalGroup.slice(0, 2),
  abnormalGroup.slice(0, 2)
);
console.log("seeSawTwo", seeSawTwo);

let normalGroupCountOne = normalGroup.slice(0, 1);
if (seeSawTwo === 0) {
  abnormalGroupCountOne = abnormalGroup.slice(2, 3);
  abnormalGroupCountTwo = abnormalGroup.slice(3, 4);
} else if (seeSawTwo < 0) {
  abnormalGroupCountOne = abnormalGroup.slice(0, 1);
  abnormalGroupCountTwo = abnormalGroup.slice(1, 2);
} else {
  abnormalGroupCountOne = abnormalGroup.slice(1, 2);
  abnormalGroupCountTwo = abnormalGroup.slice(0, 1);
}

seeSawThree = weightDifference(normalGroupCountOne, abnormalGroupCountOne);

console.log("seeSawThree", seeSawThree);

if (seeSawThree === 0) {
  differentPersonWeight = abnormalGroupCountTwo;
} else if (seeSawThree < 0) {
  differentPersonWeight = abnormalGroupCountOne;
} else {
  differentPersonWeight = abnormalGroupCountOne;
}
console.log("differentPersonWeight", differentPersonWeight);

const position = allPeople.indexOf(differentPersonWeight[0]);

console.log("differentPersonPosition", position + 1);

function arrayTotal(arr) {
  return arr.reduce((acc, val) => acc + val, 0);
}

function weightDifference(leftSide, rightSide) {
  const leftSideWeight = arrayTotal(leftSide);
  const rightSideWeight = arrayTotal(rightSide);
  return leftSideWeight - rightSideWeight;
}