counting valleys hackerrank solution javascript
'use strict';
const processData = input => {
const lines = input.split('n');
const steps = lines[1];
let valleys = 0;
let seaLevel = 0;
for(let i = 0; i < steps.length; i++) {
let c = steps.charAt(i);
if(c == 'D') {
seaLevel -= 1;
} else {
seaLevel += 1;
}
if(seaLevel == 0 && c == 'U') {
valleys += 1;
}
}
console.log(valleys);
};
process.stdin.resume();
process.stdin.setEncoding("ascii");
let _input = "";
process.stdin.on("data", input => _input += input);
process.stdin.on("end", () => processData(_input));