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Solution.cs
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123 lines (108 loc) · 2.59 KB
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public class SummaryRanges
{
UnionFind uf = new();
HashSet<int> set = [];
public SummaryRanges()
{
}
public void AddNum(int value)
{
set.Add(value);
if (set.Contains(value - 1))
{
uf.Union(value, value - 1);
}
if (set.Contains(value + 1))
{
uf.Union(value, value + 1);
}
}
public int[][] GetIntervals()
{
SortedSet<int> parent = [];
List<int[]> ans = [];
foreach (int val in set)
{
parent.Add(uf.Find(val));
}
foreach (int val in parent)
{
ans.Add(uf.GetRange(val));
}
return ans.ToArray();
}
}
public class UnionFind
{
int[] parent = new int[10_001];
int[][] map = new int[10_1001][];
public UnionFind()
{
for (int i = 0; i < parent.Length; i++)
{
parent[i] = i;
map[i] = [i, i];
}
}
public int[] GetRange(int x)
{
int rootX = Find(x);
return map[rootX];
}
public int Find(int x)
{
if (parent[x] == x) return x;
return parent[x] = Find(parent[x]);
}
public bool Union(int x, int y)
{
int rootX = Find(x);
int rootY = Find(y);
if (rootX == rootY) return false;
int[] rangeX = GetRange(rootX);
int[] rangeY = GetRange(rootY);
if (rootX < rootY)
{
parent[y] = rootX;
map[rootX] = [rangeX[0], rangeY[1]];
}
else
{
parent[x] = rootY;
map[rootY] = [rangeY[0], rangeX[1]];
}
return true;
}
}
/**
* Your SummaryRanges object will be instantiated and called as such:
* SummaryRanges obj = new SummaryRanges();
* obj.AddNum(value);
* int[][] param_2 = obj.GetIntervals();
*/
public class Solution
{
public List<dynamic> Execute(string[] events, int[][] values)
{
List<dynamic> result = [];
SummaryRanges summaryRanges = null;
for (int i = 0; i < events.Length; i++)
{
switch (events[i])
{
case "SummaryRanges":
summaryRanges = new SummaryRanges();
result.Add(null);
break;
case "addNum":
summaryRanges.AddNum(values[i][0]);
result.Add(null);
break;
case "getIntervals":
result.Add(summaryRanges.GetIntervals());
break;
}
}
return result;
}
}