[BOJ] 4388 받아올림 (B2)

Author: abcxj123

정건우/6주차/260205.java

@@ -0,0 +1,60 @@
+//https://www.acmicpc.net/problem/4388
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.StringTokenizer;
+
+public class BOJ_B2_4388_받아올림 {
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        StringBuilder sb = new StringBuilder();
+        StringTokenizer st;
+
+        while(true) {
+            st = new StringTokenizer(br.readLine());
+            String n1 = st.nextToken();
+            String n2 = st.nextToken();
+
+            if(n1.equals("0") && n2.equals("0")) break;
+
+            int [] arr1 = new int[n1.length()];
+            for (int i = 0; i < n1.length(); i++) {
+                arr1[i] = n1.charAt(n1.length()-1-i) - '0';
+            }
+
+            int [] arr2 = new int[n2.length()];
+            for (int i = 0; i < n2.length(); i++) {
+                arr2[i] = n2.charAt(n2.length()-1-i) - '0';
+            }
+
+            int cnt = getCnt(arr1, arr2);
+
+            sb.append(cnt).append("\n");
+
+        }
+
+        System.out.println(sb.toString());
+
+    }
+
+    private static int getCnt(int[] arr1, int[] arr2) {
+        int cnt = 0;
+        boolean needAdd = false;
+
+        for (int i = 0; i < Math.max(arr1.length, arr2.length); i++) {
+            int num1 = arr1.length > i ? arr1[i] : 0;
+            int num2 = arr2.length > i ? arr2[i] : 0;
+
+            int sum = num1 + num2;
+            if(needAdd) sum++;
+
+            if(sum >= 10) {
+                cnt++;
+                needAdd = true;
+            } else {
+                needAdd = false;
+            }
+        }
+        return cnt;
+    }
+}