Sum of Digits of String After Convert
给一个string表示数字, 求n次数字位求和后的结果.
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class Solution { public int getLucky(String s, int k) { StringBuilder sb = new StringBuilder(); for(char c : s.toCharArray()) sb.append((c - 'a') + 1); s = sb.toString(); while(k != 0) { int sum = 0; for(char c : s.toCharArray()) { sum += c - '0'; } s = sum + ""; k--; } return Integer.valueOf(s); } } |