sum

console.clear();
const arr = [2, 1, 5, 2, 3, 2];
const s = 8;
let found = false;

for(let i = 1; i <= arr.length; i++){
  let sum = 0;
  let number = 0;
  
  for(let j = 0; j < arr.length; j++){
    sum += arr[j];
    number++;
    
    if(sum >= s){
      console.log(number);
      found = true;
      break;
    }
    
    if(number == i){
      sum = 0;
      number = 0;
    }
    
    if(i < 1){
      sum += arr[j];
      number++;
    }
  }
  
  if(found){
    break;
  }
}