const store = [];
let maxPrev10 = -Infinity;
let result = -Infinity;

[1,1,1,1,1,5,1,1,1,1,1,1,1,1,5,1,1,1,1,1,1,].forEach((v, i) => {
  if (i < 10) {
    store.push(v);
    return;
  }
  maxPrev10 = Math.max(maxPrev10, store.shift());
  store.push(v);
  result = Math.max(result, maxPrev10 ** 2 + v ** 2 )
});

console.log(result);