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Submission #245441

# Submission time Handle Problem Language Result Execution time Memory
245441 2020-07-06T12:42:46 Z TadijaSebez Chameleon's Love (JOI20_chameleon) C++14
60 / 100
 45 ms 640 KB 
#include "chameleon.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define pii pair<int,int>

void Solve(int n) {
	if(n<=50){
		vector<bool> was(n*2+1,false);
		vector<vector<int>> cand(n*2+1,vector<int>());
		set<pii> bad;
		for(int j=1;j<=n*2;j++){
			for(int i=1;i<=n*2;i++)if(i!=j){
				if(Query({j,i})==1)cand[j].pb(i);
			}
			assert(cand[j].size()==1||cand[j].size()==3);
			if(cand[j].size()==3){
				int A=Query({j,cand[j][0],cand[j][1]});
				int B=Query({j,cand[j][1],cand[j][2]});
				int C=Query({j,cand[j][2],cand[j][0]});
				if(A==1)bad.insert({j,cand[j][2]});
				if(B==1)bad.insert({j,cand[j][0]});
				if(C==1)bad.insert({j,cand[j][1]});
			}
		}
		for(int j=1;j<=n*2;j++){
			if(was[j])continue;
			for(int i:cand[j]){
				if(!bad.count({i,j})&&!bad.count({j,i})){
					Answer(i,j);
					was[i]=was[j]=true;
					break;
				}
			}
		}
	}else{
		vector<bool> was(n*2+1,false);
		vector<vector<int>> cand(n*2+1,vector<int>());
		set<pii> bad;
		for(int j=1;j<=n*2;j++){
			vector<int> all;
			if(j<=n){
				for(int i=n+1;i<=n*2;i++)all.pb(i);
				for(int work=1;work<=3;work++){
					vector<int> tmp=all;
					while(tmp.size()>1){
						vector<int> v[2];
						for(int i=0;i<tmp.size();i++)v[i&1].pb(tmp[i]);
						v[0].pb(j);
						int B=Query(v[0]);
						v[0].pop_back();
						if(B<=v[0].size())tmp=v[0];
						else tmp=v[1];
					}
					if(work==2&&Query({j,tmp[0]})==2)break;
					cand[j].pb(tmp[0]);
					cand[tmp[0]].pb(j);
					vector<int> nxt;
					for(int i:all)if(i!=tmp[0])nxt.pb(i);
					all=nxt;
				}
			}
			assert(cand[j].size()==1||cand[j].size()==3);
			if(cand[j].size()==3){
				int A=Query({j,cand[j][0],cand[j][1]});
				int B=Query({j,cand[j][1],cand[j][2]});
				int C=Query({j,cand[j][2],cand[j][0]});
				if(A==1)bad.insert({j,cand[j][2]});
				if(B==1)bad.insert({j,cand[j][0]});
				if(C==1)bad.insert({j,cand[j][1]});
			}
		}
		for(int j=1;j<=n*2;j++){
			if(was[j])continue;
			for(int i:cand[j]){
				if(!bad.count({i,j})&&!bad.count({j,i})){
					Answer(i,j);
					was[i]=was[j]=true;
					break;
				}
			}
		}
		/*vector<bool> was(n*2+1,false);
		for(int j=1;j<=n*2;j++){
			if(was[j])continue;
			vector<int> all;
			for(int i=1;i<=n*2;i++)if(i!=j)all.pb(i);
			while(all.size()>1){
				vector<int> v[2];
				for(int i=0;i<all.size();i++)v[i&1].pb(all[i]);
				int A=Query(v[0]);
				v[0].pb(j);
				int B=Query(v[0]);
				v[0].pop_back();
				if(A==B)all=v[0];
				else all=v[1];
			}
			was[all[0]]=was[j]=true;
			Answer(j,all[0]);
		}*/
	}
}

Compilation message

chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:48:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       for(int i=0;i<tmp.size();i++)v[i&1].pb(tmp[i]);
                   ~^~~~~~~~~~~
chameleon.cpp:52:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
       if(B<=v[0].size())tmp=v[0];
          ~^~~~~~~~~~~~~

Subtask #1
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Runtime error 28 ms 640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 304 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 4 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 4 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 304 KB Output is correct
10 Correct 6 ms 384 KB Output is correct
11 Correct 6 ms 384 KB Output is correct
12 Correct 8 ms 436 KB Output is correct
13 Correct 7 ms 384 KB Output is correct
14 Correct 7 ms 384 KB Output is correct
15 Correct 6 ms 384 KB Output is correct
16 Correct 7 ms 384 KB Output is correct
17 Correct 6 ms 384 KB Output is correct
18 Correct 7 ms 384 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 45 ms 480 KB Output is correct
4 Correct 45 ms 384 KB Output is correct
5 Correct 44 ms 384 KB Output is correct
6 Correct 45 ms 384 KB Output is correct
7 Correct 45 ms 384 KB Output is correct
8 Correct 45 ms 384 KB Output is correct
9 Correct 45 ms 384 KB Output is correct

Subtask #5
0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Runtime error 28 ms 640 KB Execution killed with signal 11 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -