제출 #435212

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
435212	2021-06-23 05:34:02	ecnerwala	Keys (IOI21_keys)	C++17	100 / 100	1401 ms	91080 KiB

keys

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#include "keys.h"
#include <bits/stdc++.h>
namespace ecnerwala {
struct par_compressor {
  mutable std::vector<int> par;
  par_compressor(int N) : par(N, -1) {}
  int get_par(int a) const {
    while (par[a] >= 0) {
      if (par[par[a]] >= 0) par[a] = par[par[a]];
      a = par[a];
    }
    return a;
  }
  void set_par(int a, int b) {
    assert(par[a] < 0 && par[b] < 0);
    assert(a != b);
    par[b] += par[a];
    par[a] = b;
  }
  int cc_sz(int a) const {
    assert(par[a] < 0);
    return -par[a];
  }
};
}
 
 
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