hackerRank jumping on the clouds revisited

// https://www.hackerrank.com/challenges/jumping-on-the-clouds-revisited/problem

// declarative
const jumpingOnClouds = (c, k) => (
  c.reduce(({ energy, ind }, cloud, idx) => (
      idx === ind
          ? cloud === 0
            ? {energy: energy - 1, ind: ind + k}
            : {energy: energy - 3, ind: ind + k}
          : {energy, ind}
  ), {energy: 100, ind: 0}).energy
)

// imperative
function jumpingOnClouds(c, k) {
    let e = 100;
    for (let i = 0; i < c.length; i = i + k) {
        if (c[i] === 0) {
            e = e - 1;
        }
        else {
            e = e - 3;
        }
    }
    return e;
}