LeetCode - PlusOne
题意:给一个数按位存放在一个int数组中,要求返回这个数加一后的数组。
懒人解法:
public class Solution { public int[] plusOne(int[] digits) { java.math.BigInteger Bigdigits = new java.math.BigInteger(toString(digits)); String s = Bigdigits.add(new java.math.BigInteger("1")).toString(); return toArray(s); } public static String toString(int[] d) { StringBuilder sb = new StringBuilder(); for(int i=0; i<d.length; i++) { sb.append(d[i]); } return sb.toString(); } public static int[] toArray(String s) { int[] ans = new int[s.length()]; for(int i=0; i<s.length(); i++) { ans[i] = s.charAt(i) - '0'; } return ans; } }
作者:Pickle
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