diff --git a/1975. Maximum Matrix Sum b/1975. Maximum Matrix Sum
new file mode 100644
index 0000000..a54c37b
--- /dev/null
+++ b/1975. Maximum Matrix Sum	
@@ -0,0 +1,19 @@
+class Solution {
+public:
+    long long maxMatrixSum(vector<vector<int>>& matrix) {
+        long long ans = 0;
+        int min_num = INT_MAX;
+        int neg = 0;
+
+        for(auto i : matrix) {
+            for(int j : i) {
+                if(j < 0) neg++;
+                min_num = min(min_num, abs(j));
+                ans += abs(j);
+            }
+        }
+
+        if(neg%2==0) return ans;
+        else return ans-2*min_num;
+    }
+};