Submission #298856

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
298856	2020-09-14 08:20:15	user202729	Werewolf (IOI18_werewolf)	C++17	100 / 100	1367 ms	124584 KiB

werewolf

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// moreflags=grader.cpp
#include "werewolf.h"
#include<vector>
#include<set>
#include<climits>
#include<algorithm>
#if not LOCAL
#define NDEBUG
#endif
#include<cassert>
struct Dsu{ // with path compression but without union by rank
  std::vector<int> data; // positive: parent, negative: ~(minimum in component)
  Dsu(int number): data(number){
    for(int node=0; node<number; ++node)
      data[node]=~ node;
  }
  int root(int node){return data[node]>=0 ? data[node]=root(data[node]): node;}
  int minimumInComponent(int node){
    return ~data[root(node)];
  }
  bool join(int first, int sec){
    first=root(first); sec=root(sec);
    if(first==sec) return false;
    data[first]=std::max(data[first], data[sec]); // inverted
    data[sec]=first;
    return true;
  }
};
 
 
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Compilation message (stderr)

werewolf.cpp: In lambda function:
werewolf.cpp:53:17: warning: unused variable 'success' [-Wunused-variable]
   53 |      auto const success=dsu.join(index, other);
      |                 ^~~~~~~
werewolf.cpp: In lambda function:
werewolf.cpp:137:15: warning: unused variable 'success' [-Wunused-variable]
  137 |    auto const success=first.insert(it).second;
      |               ^~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 34 / 34
• Subtask 4: 51 / 51