public bool CanJump(int[] nums) {
int rightMost=0;
int n=nums.Length;
for(int i=0;i<n;i++)
{
if(i<=rightMost)
{
rightMost = Math.Max(rightMost,i+nums[i]);
if(rightMost>=n-1)
{
return true;
}
}
}
return false;
}