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| import java.util.*;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String str1 = sc.next();
String str2 = sc.next();
int[] num1 = new int[(int)1e5 + 10];
int[] num2 = new int[(int)1e5 + 10];
int len1 = str1.length();
for (int i = len1 - 1; i >= 0; i--) {
num1[len1 - 1 - i] = str1.charAt(i) - '0';
}
int len2 = str2.length();
for (int i = len2 - 1; i >= 0; i--) {
num2[len2 - 1 - i] = str2.charAt(i) - '0';
}
List<Integer> res = add_int(num1, num2, Math.max(len1, len2));
for (int i = 0; i < res.size(); i++) {
System.out.print(res.get(res.size() - 1 - i));
}
}
public static List<Integer> add_int(int[] num1, int[] num2, int len) {
int tmp = 0;
List<Integer> res = new ArrayList(len);
for (int i = 0; i < len; i++) {
int sum = num1[i] + num2[i] + tmp;
res.add(sum % 10);
if (sum >= 10) tmp = 1;
else tmp = 0;
}
if (tmp == 1) res.add(1);
return res;
}
}
|