题源 https://ac.nowcoder.com/acm/contest/9925G Fibonacci签到题，斐波那契数列中偶数的个数为长度的三分之一，贡献值从 n 向下递减/// ~~AK~~ Cu
#include <bits/stdc++.h>
#define int ll
typedef long long ll;
using namespace std;
in...
题源：https://www.luogu.org/problem/P1048#include <bits/stdc++.h>
#define numm ch - 48
#define pd putchar(' ')
#define pn putchar('\n')
#define pb push_back
#define fi first
#define se second
#...