var common = function(x){
let cntN = (x + '').length;
let rs = 0;
for(let i = (cntN-1),j=0 ; i >-1;i--,j++){
let temp = Math.floor(x/Math.pow(10,i));
x = x - temp*Math.pow(10,i);
rs += temp*Math.pow(10,j);
}
return rs;
}
/**
* @param {number} x
* @return {number}
*/
var reverse = function(x) {
if(x>0&&x<1534236469){
return common(x);
}else if(x==0||x==(-1563847412)||x>1534236468||((-x)>2147483412)){
return 0;
}else{
return -common(-x);
}
};
整数溢出 我还得查查~~!!!