function challenge(input){
    let ms=Number(input.shift());
    let fs=Number(input.shift());
    let tables=Number(input.shift());
    let encounters=0
    let toPrint="";

    
        for (let m=1;m<=ms; m++){
            for (let f=1; f<=fs; f++){
                toPrint+="("+ m+" <-> "+ f+") ";
            
                encounters++;
                if (encounters>=tables){
                    break;
                }
                
            }
           
    } console.log(toPrint);

}