//Zoos // Sample code to perform I/O: process.stdin.resume(); process.stdin.setEncoding("utf-8"); var stdin_input = ""; process.stdin.on("data", function (input) { stdin_input += input; // Reading input from STDIN }); process.stdin.on("end", function () { main(stdin_input); }); function main(input) { var data= input.toString().split("\n"); process.stdout.write(check(data[0])); // Writing output to STDOUT } // Warning: Printing unwanted or ill-formatted data to output will cause the test cases to fail // Write your code here // Sample code to perform I/O: //Enter your code here function check(data) { const n=data.length; let x = 0; let y = 0; for (let i=0; i<n; i++) { if (data[i]=="z") { x++ ; } else { if (data[i]=="o") { y++; } } } if (2 * x == y) { return "Yes"; } else { return "No";} }