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#663172#9484. Colored Complete Graphicpc_zhzx034#TL 45ms9060kbC++142.0kb2024-10-21 13:55:592024-10-21 13:55:59

Judging History

This is the latest submission verdict.

  • [2024-10-21 13:55:59]
  • Judged
  • Verdict: TL
  • Time: 45ms
  • Memory: 9060kb
  • [2024-10-21 13:55:59]
  • Submitted

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <ll,ll> P;
#define _for(x,y,z) for (int x(y),_(z); x<=_; ++x)
#define _rep(x,y,z) for (int x(y),_(z); x>=_; --x)
inline ll read(){ ll x; cin>>x; return x; }
inline void _init(){
	#ifdef LOCAL
		assert(freopen("test.in", "r", stdin));
		assert(freopen("test.out", "w", stdout));
	#endif
	// ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
}

int n;

constexpr int N=5e4;

vector<int>G[2][N+5];

int vis[2][N+5],cnte[2],cntask;

P E[2][N+5];
mt19937 rnd(time(0));
int ask(int x,int y){
	++cntask;
	assert(cntask<=2*n);
	assert(x!=y);
	string s;
	cout<<"? "<<x<<' '<<y<<'\n';
	cout.flush();
	cin>>s;
	return s[0]=='B';
}
void dfs(int op,int u){
	vis[op][u]=1;
	for(int v:G[op][u]){
		if(vis[op][v])continue;
		dfs(op,v);
		E[op][++cnte[op]]={u,v};
	}
}
void answer(int op){
	cout<<"!\n";
	_for(i,1,cnte[op]){
		cout<<E[op][i].first<<' '<<E[op][i].second<<'\n';
	}
	cout.flush();
}
set<int>B,R;
void init() {}
void procedure() {
	cin>>n;
	_for(i,2,n){
		if(ask(1,i)){
			B.insert(i);
			G[1][1].emplace_back(i);
			G[1][i].emplace_back(1);
		}
		else{
			R.insert(i);
			G[0][1].emplace_back(i);
			G[0][i].emplace_back(1);
		}
	}
	set<int>tmpB,tmpR;
	while(!B.empty()&&!R.empty()){
		tmpB.clear(),tmpR.clear();
		auto b=B.begin(),r=R.begin();
		while(b!=B.end()&&r!=R.end()){
			if(ask(*b,*r)){
				tmpB.insert(*b);
				G[1][*b].emplace_back(*r);
				G[1][*r].emplace_back(*b);
			}
			else{
				tmpR.insert(*r);
				G[0][*b].emplace_back(*r);
				G[0][*r].emplace_back(*b);
			}
			++b,++r;
		}
		while(b!=B.end()){
			tmpB.insert(*b);
			++b;
		}
		while(r!=R.end()){
			tmpR.insert(*r);
			++r;
		}
		B=tmpB,R=tmpR;
	}
	dfs(0,1);
	if(cnte[0]==n-1){
		answer(0);
		return;
	}
	dfs(1,1);
	if(cnte[1]==n-1){
		answer(1);
		return;
	}
}

int main() {
	_init(), init();
	int T=1;
	while(T--) procedure();
	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 100
Accepted
time: 0ms
memory: 6548kb

input:

3
B
R
B

output:

? 1 2
? 1 3
? 2 3
!
2 3
1 2

result:

ok AC

Test #2:

score: 0
Accepted
time: 4ms
memory: 7220kb

input:

983
B
R
R
B
B
B
B
B
R
B
R
R
R
R
R
R
R
B
B
R
R
B
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B
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B
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R
B
R
R
B
R
R
B
R
R
B
R
B
R
B
B
R
B
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #3:

score: 0
Accepted
time: 2ms
memory: 6600kb

input:

75
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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R
R
R
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R
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R
R
R

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #4:

score: 0
Accepted
time: 0ms
memory: 7048kb

input:

430
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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R
R
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R
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R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #5:

score: 0
Accepted
time: 0ms
memory: 6544kb

input:

238
B
R
R
B
B
B
B
B
R
B
R
R
R
R
R
R
R
B
B
R
R
B
R
B
R
R
B
B
R
B
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B
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B
B
B
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B
B
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B
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B
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B
B
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B
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B
B
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B
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B
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B
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B
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B
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B
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B
B
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B
B
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B
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B
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B
R
R
R
B
R
R
B
R
R
B
R
R
B
R
B
R
B
B
R
B
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #6:

score: 0
Accepted
time: 2ms
memory: 7380kb

input:

42
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
B
R
R
R
R
R
R
R
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R
R
R
R
B
B
B
B
B
B
B
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B
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B
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B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 30 2
? 30 3
? 30 4
...

result:

ok AC

Test #7:

score: 0
Accepted
time: 2ms
memory: 7208kb

input:

759
R
R
R
R
R
R
R
R
R
R
R
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R
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R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #8:

score: 0
Accepted
time: 4ms
memory: 6636kb

input:

389
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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R
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R
R
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R
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R
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R
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R
R
R
R
R
R
R
R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #9:

score: 0
Accepted
time: 0ms
memory: 6736kb

input:

47
R
R
R
R
R
R
R
B
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #10:

score: 0
Accepted
time: 24ms
memory: 7552kb

input:

14657
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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R
R
R
R
R
R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #11:

score: 0
Accepted
time: 17ms
memory: 7944kb

input:

15755
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
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R
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R
R
R
R
R
R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #12:

score: 0
Accepted
time: 45ms
memory: 9060kb

input:

14236
B
R
R
B
B
B
B
B
R
B
R
R
R
R
R
R
R
B
B
R
R
B
R
B
R
R
B
B
R
B
R
R
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R
B
R
B
B
B
R
R
R
B
B
R
R
B
R
B
R
B
B
B
R
B
R
R
B
R
B
B
R
R
R
B
B
B
B
R
B
R
R
B
R
B
B
R
B
R
B
R
B
R
R
R
B
B
B
R
R
B
B
B
R
R
B
R
B
B
B
R
B
B
R
R
B
B
R
R
R
R
B
R
R
B
B
B
R
B
B
B
B
R
B
R
R
B
R
R
R
B
R
R
B
R
R
B
R
R
B
R
B
R
B
B
R
B
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result:

ok AC

Test #13:

score: -100
Time Limit Exceeded

input:

19615
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
...

output:

? 1 2
? 1 3
? 1 4
? 1 5
? 1 6
? 1 7
? 1 8
? 1 9
? 1 10
? 1 11
? 1 12
? 1 13
? 1 14
? 1 15
? 1 16
? 1 17
? 1 18
? 1 19
? 1 20
? 1 21
? 1 22
? 1 23
? 1 24
? 1 25
? 1 26
? 1 27
? 1 28
? 1 29
? 1 30
? 1 31
? 1 32
? 1 33
? 1 34
? 1 35
? 1 36
? 1 37
? 1 38
? 1 39
? 1 40
? 1 41
? 1 42
? 1 43
? 1 44
? 1 45
...

result: