08-14-25

Luogu/P1011 [NOIP 1998 提高组] 车站.cpp

@@ -0,0 +1,19 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+int main(){
+	vector<int> feb;
+	int n, a, m, x;
+	cin >> a >> n >> m >> x;
+	feb.reserve(n);
+	feb.push_back(1);feb.push_back(1);
+	for(int i = 2; i < n; i++){
+		feb[i] = feb[i - 1] + feb[i - 2];
+	} 
+	int b = (m - (feb[n - 4] + 1) * a) / (feb[n - 3] - 1);
+	int out = (feb[x - 3] + 1) * a + (feb[x - 2] - 1) * b;
+	cout << out << endl;
+	return 0;
+}
+//5 7 32 4
+