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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#73763#4884. Battleship: New RulesAppleblue17WA 8ms3524kbC++141.2kb2023-01-27 22:08:522023-01-27 22:08:56

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-01-27 22:08:56]
  • 评测
  • 测评结果:WA
  • 用时:8ms
  • 内存:3524kb
  • [2023-01-27 22:08:52]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
const int N=1100;
int T,n;
int f[N][N];

int cal(int x,int y){
	if(x>n || y>n) return 0;
	if(f[x][y]!=-1) return f[x][y];
	cout<<"? "<<x<<" "<<y<<'\n';
	cin>>f[x][y];
	return f[x][y];
}

int calc(int l,int r,int L,int R){
	int tot=(r-l+1)*(R-L+1)%2,lst;
	
	for(int i=l-1;i<=r;i++) cal(i,R);
	lst=cal(l-1,R);
	for(int i=l;i<=r;i++){
		int s=cal(i,R);
		if(s || lst) tot^=1;
		lst=s;
	}
	
	for(int i=L-1;i<=R;i++) cal(r,i);
	lst=cal(r,L-1);
	for(int i=L;i<=R;i++){
		int s=cal(r,i);
		if(s || lst) tot^=1;
		lst=s;
	}
	return tot;
}

void solve(int l,int r,int L,int R){
	if(l==r && L==R){
		cout<<"! "<<l-1<<" "<<L-1<<'\n';
		int s; cin>>s;
		return ;
	}
	if(R-L>r-l){
		int MID=(L+R)>>1;
		if(calc(l,r,L,MID)) solve(l,r,L,MID);
		else solve(l,r,MID+1,R);
	}
	else{
		int mid=(l+r)>>1;
		if(calc(l,mid,L,R)) solve(l,mid,L,R);
		else solve(mid+1,r,L,R);
	}
}

int main(){
	cin>>T;
	while(T--){
		cin>>n;
		for(int i=1;i<=n+1;i++)
			for(int j=1;j<=n+1;j++)
				f[i][j]=-1;
		if(n & 1){
			cout<<"! -1 -1"<<'\n';
			int s; cin>>s;
			continue;
		}
		solve(1,n+1,1,n+1);
	}
	
}

Details

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Test #1:

score: 100
Accepted
time: 2ms
memory: 3524kb

input:

2
3
1
4
1
0
0
0
0
0
0
0
1

output:

! -1 -1
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2

result:

ok max_C=2.00, avg_C=1.00 (2 test cases)

Test #2:

score: 0
Accepted
time: 8ms
memory: 3344kb

input:

100
4
1
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
0
1
4
0
0
0
1
1
0
1
0
1
4
0
0
0
1
1
0
1
0
1
4
1
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
0
1
4
0
0
0
1
1
0
1
0
1
4
0
0
0
1
1
0
1
0
1
4
0
0
0
1
1
0
1
0
1
4
0
0
0
1
1
0
1
0
1
4
1
0
0
0
0
0
0
0
1
4
0
0
0
1
1
0
1
0
1
4
1
0
0
0
0
0
0
0
1
4
1
0
0
0
0
0
0
...

output:

? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
? 2 3
? 2 1
? 2 2
! 2 2
? 3 1
? 3 2
? 3 3
? 3 4
? 1 3
...

result:

ok max_C=2.00, avg_C=2.00 (100 test cases)

Test #3:

score: -100
Wrong Answer
time: 4ms
memory: 3404kb

input:

100
10
1
1
0
1
0
1
0
1
0
1
1
0
1
1
1
0
1
0
1
0
0
1
-1

output:

? 6 1
? 6 2
? 6 3
? 6 4
? 6 5
? 6 6
? 6 7
? 6 8
? 6 9
? 6 10
? 1 6
? 2 6
? 3 6
? 4 6
? 5 6
? 3 7
? 3 8
? 3 9
? 3 10
? 4 9
? 5 9
? 5 10
! 5 9

result:

wrong output format Unexpected end of file - int32 expected (test case 1)