diff --git a/src/week5/BOJ1912/BOJ1912_V1.cpp b/src/week5/BOJ1912/BOJ1912_V1.cpp
new file mode 100644
index 0000000..bbc1d7e
--- /dev/null
+++ b/src/week5/BOJ1912/BOJ1912_V1.cpp
@@ -0,0 +1,25 @@
+#include <bits/stdc++.h>
+using namespace std;
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+
+    int n;
+    int ret = -1004;
+    cin >> n;
+
+    int sum = 0;
+    for (int i=0; i<n; i++) {
+        int num;
+        cin >> num;
+        sum += num;
+        ret = max(ret, sum);
+        if (sum < 0) sum = 0;
+    }
+
+    cout << ret;
+
+    return 0;
+}
\ No newline at end of file