diff --git a/src/week6/BOJ1072/BOJ1072_V1.cpp b/src/week6/BOJ1072/BOJ1072_V1.cpp
new file mode 100644
index 0000000..42237be
--- /dev/null
+++ b/src/week6/BOJ1072/BOJ1072_V1.cpp
@@ -0,0 +1,31 @@
+#include <bits/stdc++.h>
+using namespace std;
+long long int X,Y,Z, ret=-1;
+bool check(long long int num){
+    return ((100 * (Y + num)) / (X+num)) != Z;
+}
+int main() {
+
+    ios_base::sync_with_stdio(false);
+    cin.tie(nullptr);
+    cout.tie(nullptr);
+
+    cin >> X >> Y;
+    Z = (100 * Y) / X;
+    int high = X, low = 1, mid;
+
+    while(low <= high) {
+        mid = (high + low) / 2;
+        if (check(mid)) {
+            ret = mid;
+            high = mid - 1;
+        } else {
+            low = mid + 1;
+        }
+    }
+
+    cout << ret << '\n';
+
+
+    return 0;
+}
\ No newline at end of file