function solve(input){
let first=Number(input.shift());
let second=Number(input.shift());
let third=Number(input.shift());
let father=Number(input.shift());
 let sum=1/(1/first + 1/second + 1/third);
 let totatlTime =sum*1.15;
 let leftTime = father - totalTime;
 console.log(`Cleanig time: ${totalTime.toFixed(2)}`);
 if (leftTime>=0){
     leftTime=Math.floor(leftTime);
     console.log(`Yes, there is a surprise - time left ->` +
     `${leftTime.toFixed(0)} hours`);
 } else {
     leftTime=Math.abs(leftTime);
     leftTime=Math.ceil(leftTime);
     console.log(`No, there isn't a surprise - shortage of time -> `
+ `${leftTime.toFixed(0)} hours.`);
 }

 }
solve ([`3`,`4`,`5`,`3.6`]);