function deleteBracket(bracket){
let stack=[]
for(let i=0;i<bracket.length;i++){
let start=bracket[i]
if(start=="("||start=="{"||start=="["){
stack.push(start)
}else{
let end=stack[stack.length-1]
if(
end=='('&&start==")"||
end=="["&&start=="]"||
end=='{'&&start=="}"
){
stack.pop()
}else{
return false
}
}
}
return stack.length==0
}
console.log(deleteBracket(bracket))
