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Update0216.组合总和3，添加C#

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2023-12-12 09:20:04 +08:00
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problems/0216.组合总和III.md
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@ -633,7 +633,66 @@ object Solution {
} }
} }
``` ```
### C#
```csharp
public class Solution
{
public IList<IList<int>> res = new List<IList<int>>();
public IList<int> path = new List<int>();
public IList<IList<int>> CombinationSum3(int k, int n)
{
BackTracking(k, n, 0, 1);
return res;
}
public void BackTracking(int k, int n, int sum, int start)
{
if (path.Count == k)
{
if (sum == n)
res.Add(new List<int>(path));
return;
}
for (int i = start; i <= 9; i++)
{
sum += i;
path.Add(i);
BackTracking(k, n, sum, i + 1);
sum -= i;
path.RemoveAt(path.Count - 1);
}
}
}
// 剪枝
public class Solution
{
public IList<IList<int>> res = new List<IList<int>>();
public IList<int> path = new List<int>();
public IList<IList<int>> CombinationSum3(int k, int n)
{
BackTracking(k, n, 0, 1);
return res;
}
public void BackTracking(int k, int n, int sum, int start)
{
if (sum > n)
return;
if (path.Count == k)
{
if (sum == n)
res.Add(new List<int>(path));
return;
}
for (int i = start; i <= 9 - (k - path.Count) + 1; i++)
{
sum += i;
path.Add(i);
BackTracking(k, n, sum, i + 1);
sum -= i;
path.RemoveAt(path.Count - 1);
}
}
}
```