add some

storage/ojuz/cpp/KAISTRUN26SPRING_B.cpp

@@ -0,0 +1,27 @@
+#include <iostream>
+#include <algorithm>
+#include <vector>
+#include <cstdint>
+:
+#define let auto
+#define fn auto
+#define usize size_t
+#define u64 uint64_t
+#define i64 int64_t
+using namespace std;
+
+fn fastio() {
+    ios::sync_with_stdio(false);
+    cin.tie(nullptr);
+}
+
+fn main() -> int {
+    fastio();
+    u64 r, u, n;
+
+    cin >> r >> u >> n;
+    // f(n-2) f(n-1) f(n)
+    // f(n-2) * r + f(n-1) * u
+    // 일정 이상의 n에 대해서 f(n-2)와 f(n-1)은 서로소임.
+
+}