Submission #235005

#	Time	Username	Problem	Language	Result	Execution time	Memory
235005		rajarshi_basu	Chameleon's Love (JOI20_chameleon)	C++14	0 / 100	5 ms	384 KiB

chameleon

#include <stdio.h>     
#include <stdlib.h>    
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>
#include <queue>
#include <deque>
#include <iomanip>
#include <cmath>
#include <set>
#include <stack>
#include <map>
#include <unordered_map>

#define FOR(i,n) for(int i=0;i<n;i++)
#define FORE(i,a,b) for(int i=a;i<=b;i++)
#define ll long long 
#define ld long double
//#define int short
#define vi vector<int>
#define pb push_back
#define ff first
#define ss second
#define ii pair<int,int>
#define iii pair<int,ii>
#define pll pair<ll,ll>
#define plll pair<ll,pll>
#define mp make_pair
#define vv vector
#define endl '\n'

#include "chameleon.h"

using namespace std;

bool query(vi all, int extra){
	all.pb(extra);
	return Query(all) == all.size();
}

int query3(int a,int b,int c){
	vi all;all.pb(a);all.pb(b);all.pb(c);
	return Query(all);
}

vi res;
void binsrch(vi allNum,int x){
	if(allNum.size() == 1){
		res.pb(allNum[0]);
		return;
	}
	vi halves[2];
	FOR(i,allNum.size())halves[i%2].pb(i);
	FOR(j,2)if(query(halves[j],x))binsrch(halves[j],x);
}
vi indsets[4];

void Solve(int n){
	n*=2;
	indsets[0].pb(1);
	FORE(i,2,n){
		FOR(j,4){
			if(indsets[j].empty() or query(indsets[j],i)){
				indsets[j].pb(i);
			}
		}
	}
	// everything has been partitioned.
	vi edges[n+1];
	FOR(i,4){
		for(auto e : indsets[i]){
			res.clear();
			FOR(j,4){
				if(i != j){
					binsrch(indsets[j],e);
					for(auto x:res)edges[e].pb(x);
				}
			}
		}
	}
	int other[n+1];
	set<int> allSets[n+1];
	FOR(i,n+1)for(auto x:edges[i])allSets[i].insert(x);
	FORE(i,1,n){
		if(edges[i].size() == 1){
			other[i] = edges[i][0];
			other[edges[i][0]] = i;
			continue;
		}
		// has 3 edges;
		int a = query3(i,edges[i][0],edges[i][1]);
		int b = query3(i,edges[i][1],edges[i][2]);
		int numTorem;
		if(a == 1){
			numTorem = edges[i][2];
		}else if(b == 1){
			numTorem = edges[i][0];
		}else{
			numTorem = edges[i][1];
		}
		allSets[i].erase(numTorem);
		allSets[numTorem].erase(i);
	}
	FORE(i,1,n){
		int x = *(allSets[i].begin());
		if(i < x)Answer(i,x);
	}
}

Compilation message (stderr)

chameleon.cpp: In function 'bool query(std::vector<int>, int)':
chameleon.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  return Query(all) == all.size();
         ~~~~~~~~~~~^~~~~~~~~~~~~
chameleon.cpp: In function 'void binsrch(std::vector<int>, int)':
chameleon.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 #define FOR(i,n) for(int i=0;i<n;i++)
chameleon.cpp:55:6:
  FOR(i,allNum.size())halves[i%2].pb(i);
      ~~~~~~~~~~~~~~~           
chameleon.cpp:55:2: note: in expansion of macro 'FOR'
  FOR(i,allNum.size())halves[i%2].pb(i);
  ^~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:83:6: warning: variable 'other' set but not used [-Wunused-but-set-variable]
  int other[n+1];
      ^~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36