diff --git a/src/week4/BOJ14890/BOJ14890_V1.cpp b/src/week4/BOJ14890/BOJ14890_V1.cpp
new file mode 100644
index 0000000..965c2a2
--- /dev/null
+++ b/src/week4/BOJ14890/BOJ14890_V1.cpp
@@ -0,0 +1,39 @@
+#include <bits/stdc++.h>
+using namespace std;
+int n,m;
+int ret;
+void calculate(int arr[101][101]) {
+    for (int i=0; i<n; i++) {
+        int cnt = 1;
+        int j;
+        for (j=0; j<n-1; j++) {
+            if (arr[i][j] == arr[i][j+1]) cnt++;
+            else if (arr[i][j] + 1 == arr[i][j+1] && cnt >= m) cnt = 1;
+            else if (arr[i][j] - 1 == arr[i][j+1] && cnt >= 0) cnt = -(m-1);
+            else break;
+        }
+        if (j == n-1 && cnt >= 0) ret++;
+    }
+}
+int main() {
+    ios::sync_with_stdio(false);
+    cin.tie(NULL);
+    cout.tie(NULL);
+
+    cin >> n >> m;
+    int a[101][101], b[101][101];
+
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < n; j++) {
+            cin >> a[i][j];
+            b[j][i] = a[i][j];
+        }
+    }
+
+    calculate(a);
+    calculate(b);
+
+    cout << ret << '\n';
+
+    return 0;
+}
\ No newline at end of file