Write an algorithm to determine if a number
A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers.
Return True if
Example:
Code
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class Solution { public boolean isHappy(int n) { int x = n; int y = n; while(x>1){ x = cal(x) ; if(x==1) return true ; y = cal(cal(y)); if(y==1) return true ; if(x==y) return false; } return true ; } public int cal(int n){ int x = n; int s = 0; while(x>0){ s = s+(x%10)*(x%10); x = x/10; } return s ; } } |
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