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- #include <iostream>
- #include <vector>
- #include <algorithm>
- using namespace std;
- int fib(int n) {
- if(n <= 1) {
- return 1;
- }
- return fib(n - 1) + fib(n - 2);
- }
- int main() {
- int n;
- cin >> n;
- cout << fib(n);
- return 0;
- }
- // 1 1 2 3 5 8 13
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