[20251029] PGM / LV2 / 행렬의 곱 / 이인희

Author: LiiNi-coder

LiiNi-coder/202510/29 PGM 행렬의 곱셈.md

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+```java
+import java.util.*;
+
+class Solution {
+    public int[][] solution(int[][] arr1, int[][] arr2) {
+        int rows = arr1.length;
+        int cols = arr2[0].length;
+        int common = arr2.length;
+        int[][] answer = new int[rows][cols];
+
+        for(int i = 0; i < rows; i++){
+            for(int j = 0; j < cols; j++){
+                int sum = 0;
+                for(int k = 0; k < common; k++){
+                    sum += arr1[i][k] * arr2[k][j];
+                }
+                answer[i][j] = sum;
+            }
+        }
+
+        return answer;
+    }
+}
+```