subarray division hackerrank solution javascript
// subarray division hackerrank solution javascript
function birthday(s, d, m) {
// Write your code here
let count = 0;
let sum = 0;
for(let i=0 ; i<s.length; i++){
sum = s.slice(i, m + i).reduce((previous,current) => previous + current);
if(sum === d){
count++
}
}
return count;
}