print(f"{i[0]}-{i[1]}")
时间: 2023-12-19 22:04:08 浏览: 40
Hello! It seems like you would like to print the values of `i[0]` and `i[1]` in a formatted way. To achieve that, you can use the `print()` function with a formatted string. Here's an example of how you can do it:
```python
i = ["value1", "value2"]
print(f"{i[0]}-{i[1]}")
```
This will print the values of `i[0]` and `i[1]` separated by a hyphen. Feel free to replace `"value1"` and `"value2"` with the actual values you want to display. Let me know if you have any further questions!
相关问题
优化以下代码:def find_max(): f = [1, 1, 0] for i in range(3, 51): f.append(f[i-1] - 2*f[i-2] + f[i-3]) return max(f)print(find_max())
可以发现,每次计算f[i]只需要用到f[i-1]、f[i-2]和f[i-3]三个值,因此可以使用滚动数组的方式,将空间复杂度优化为O(1)。代码实现如下:
```python
def find_max():
f0, f1, f2 = 1, 1, 0
for i in range(3, 51):
f = f1 - 2*f2 + f0
f0, f1, f2 = f1, f2, f
return max(f0, f1, f2)
print(find_max())
```
其中,f0、f1、f2表示f[i-3]、f[i-2]、f[i-1]三个值,每次更新后向前滚动。这样可以节省数组空间,提高程序效率。
while True: try: n = int(input()) f = [0] * (n+1) f[0] = 1 for i in range(1, n+1): f[i] += f[i-1] if i > 1: f[i] += f[i-2] if i > 2: f[i] += f[i-3] print(f[n]) except: break请帮我转换成c++代码
以下是对应的C++代码实现:
```cpp
#include <iostream>
#include <vector>
using namespace std;
int main() {
int n;
while (cin >> n) {
vector<int> f(n + 1, 0);
f[0] = 1;
for (int i = 1; i <= n; i++) {
f[i] += f[i - 1];
if (i > 1) {
f[i] += f[i - 2];
}
if (i > 2) {
f[i] += f[i - 3];
}
}
cout << f[n] << endl;
}
return 0;
}
```
其中,使用了vector<int>容器存储f数组。同样使用while和cin来实现多组输入输出,根据题目要求,使用for循环计算状态转移方程并输出结果。