Hiking ⛰ 

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function processData(input) { let string = input.split('\n'); let n = string[0]; let arr = string[1].split(""); let flag = 0 ; let down = 0 ; let res =0 ; arr.forEach((a) =>{ if(a == 'U'){ flag++; }else{ flag--; } if(flag < 0) down =1 if(flag ==0 && down == 1) res++, down = 0 } ); console.log(res) } process.stdin.resume(); process.stdin.setEncoding("ascii"); _input = ""; process.stdin.on("data", function (input) { _input += input; }); process.stdin.on("end", function () { processData(_input); });
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