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GeezerVison is showing github.com — abc/Multiply Strings.java at master · stevencoding/abc Expand file tree/ Copy pathMultiply Strings.javaMore file actions 24 lines (24 loc) · 826 Bytes / Copy pathMultiply Strings.javaFile metadata and controls24 lines (24 loc) · 826 Bytes 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 public class Solution { public String multiply(String num1, String num2) { // Start typing your Java solution below // DO NOT write main() function if(num1==null || num2==null) return null; if(num1.equals("0") || num2.equals("0")) return "0"; int []array=new int[num1.length()+num2.length()]; for(int i=num1.length()-1; i>=0; i--) { for(int j=num2.length()-1; j>=0; j--) { array[i+j+1]+=(num1.charAt(i)-'0')*(num2.charAt(j)-'0'); } } String result=""; for(int i=num1.length()+num2.length()-1; i>0; i--) { array[i-1]+=array[i]/10; result=array[i]%10+result; } if(array[0]!=0) result=array[0]+result; return result; } } |
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