Update ufds.cpp

Author: alirezakhm

data_structure/ufds.cpp

@@ -1,13 +1,13 @@
 class UFDS {
 public:
- vector<int> p, rank, setSizes;
+ vi p, rank, setSizes;
  int numSets;
 
  UFDS(int n) {
  numSets = n;
  rank.assign(n, 0); p.assign(n, 0);
- for (int i = 0; i < n; i++) p[i] = i;
- setSizes.assign(N, 1);
+ forn(i, n) p[i] = i;
+ setSizes.assign(n, 1);
  }
  int findSet(int i) { return (p[i] == i) ? i : p[i] = findSet(p[i]); }
  bool isSameSet(int i, int j) { return findSet(i) == findSet(j); }
@@ -25,5 +25,4 @@ class UFDS {
  }
  }
  int setSize(int i) { return setSizes[findSet(i)]; }
- void clear(){ p.clear(); rank.clear(); setSizes.clear(); }
 };