'commit'

TangDou/LuoGuBook/P5461_0.cpp

@@ -0,0 +1,17 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+const int N = 210;
+long long a[N];
+
+long long fib(int n) {
+    if (n == 1) return 1;
+    if (n == 2) return 1;
+    if (a[n]) return a[n];
+    return a[n] = fib(n - 1) + fib(n - 2);
+}
+
+int main() {
+    printf("%lld", fib(100));
+    return 0;
+}