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  1. Prepare
  2. Security
  3. Functions
  4. Security Involution
  5. Discussions

Security Involution

  • gianlucca
     + 0 comments

    js 

    function processData(input) {
    //Enter your code here
    let arr = (input.split(`\n`)[1].split(' ').map(e => Number(e)))
    let c =0;
        
    let keys = [...arr.keys()]
    for(let key in  keys){
        if(arr.findIndex(n => n==(Number(key) +1))+1 == arr[Number(key)])
            c++;
    }
    if(Number(c)==arr.length )
        console.log("YES");
    else
        console.log("NO");
}