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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#574670#6394. Turn on the LightGammaRaysWA 1ms3732kbC++23717b2024-09-18 23:42:192024-09-18 23:42:19

Judging History

你现在查看的是最新测评结果

  • [2024-09-18 23:42:19]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:3732kb
  • [2024-09-18 23:42:19]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;

void answer(int x) {
    cout << '!' << ' ' << x << endl;
    exit(0);
}

void solve(int l,int r,int lst)
{
    int mid,x,y;
    mid=(l+r)>>1;
    if(l==r)
    {
        answer(l);
    }
    cout<<"? "<<mid<<"\n";
    cin>>x;
    cout.flush();
    if(x==lst)
    {
        answer(mid);
    }
    cout<<"? "<<r<<"\n";
    cin>>y;
    cout.flush();
    if(y==x)
    {
        answer(r);
    }
    // cout<<x<<" "<<y<<endl;
    if(x<y)
    {
        solve(l,max(l,mid-1),y);
    }
    else
    {
        solve(min(r-1,mid+1),r-1,y);
    }
    return;
}

int main() {
    int n;
    cin >> n;
    solve(1, n, 0);
    return 0;
}

详细

Test #1:

score: 100
Accepted
time: 0ms
memory: 3644kb

input:

3
1
1

output:

? 2
? 3
! 3

result:

ok Correct position at 3

Test #2:

score: 0
Accepted
time: 1ms
memory: 3584kb

input:

10
1
0
1
0

output:

? 5
? 10
? 7
? 9
! 8

result:

ok Correct position at 8

Test #3:

score: 0
Accepted
time: 1ms
memory: 3576kb

input:

9
1
2
1
1

output:

? 5
? 9
? 2
? 4
! 4

result:

ok Correct position at 4

Test #4:

score: 0
Accepted
time: 1ms
memory: 3704kb

input:

8
1
0
1
1

output:

? 4
? 8
? 6
? 7
! 7

result:

ok Correct position at 7

Test #5:

score: 0
Accepted
time: 1ms
memory: 3584kb

input:

7
1
2
3
4

output:

? 4
? 7
? 2
? 3
! 1

result:

ok Correct position at 1

Test #6:

score: 0
Accepted
time: 1ms
memory: 3644kb

input:

6
1
0
1
1

output:

? 3
? 6
? 4
? 5
! 5

result:

ok Correct position at 5

Test #7:

score: 0
Accepted
time: 1ms
memory: 3732kb

input:

5
1
2
2

output:

? 3
? 5
? 1
! 1

result:

ok Correct position at 1

Test #8:

score: 0
Accepted
time: 0ms
memory: 3648kb

input:

4
1
1

output:

? 2
? 4
! 4

result:

ok Correct position at 4

Test #9:

score: 0
Accepted
time: 1ms
memory: 3580kb

input:

3
1
1

output:

? 2
? 3
! 3

result:

ok Correct position at 3

Test #10:

score: 0
Accepted
time: 0ms
memory: 3640kb

input:

2
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #11:

score: 0
Accepted
time: 0ms
memory: 3568kb

input:

1

output:

! 1

result:

ok Correct position at 1

Test #12:

score: -100
Wrong Answer
time: 1ms
memory: 3644kb

input:

1000000
1
0
1
2
3
4
3
4
3
2
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

output:

? 500000
? 1000000
? 750000
? 999999
? 625000
? 749999
? 562500
? 624999
? 531250
? 562499
? 546874
? 562498
? 554686
? 562497
? 550780
? 554685
? 548827
? 550779
? 547850
? 548826
? 547362
? 547849
? 547118
? 547361
? 546996
? 547117
? 546935
? 546995
? 546904
? 546934
? 546889
? 546903
? 546881
? ...

result:

wrong answer Wrong answer, more than 1 possible light!