QOJ.ac

QOJ

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
#103797#6394. Turn on the LighttarjenAC ✓4ms3464kbC++17803b2023-05-07 16:13:092023-05-07 16:13:13

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.
  • [2023-05-07 16:13:13]
  • 评测
  • 测评结果：AC
  • 用时：4ms
  • 内存：3464kb
查看
  • [2023-05-07 16:13:09]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int maxn=1010;
int query(int x){
    cout<<"? "<<x<<endl;
    int z;cin>>z;return z;
}
void write(int x){
    cout<<"! "<<x<<endl;
    exit(0);
}
int main()
{
    int n;cin>>n;
    if(n==1)write(n);
    // int L=0,R=0;
    int left=1;
    int now=0;
    int l=1,r=n,res=-1;
    while(l<=r){
        int mid=(l+r)/2;
        // cout<<"l="<<l<<" r="<<r<<"\n";
        if(now==0){
            now=query(left++);
            if(now==0)write(left-1);
            continue;
        }
        if(mid<left)mid++;
        int t=query(mid);
        if(t==now)write(mid);
        res=mid;
        if(t<now){
            now=t;
            r=mid-1;
        }
        else now=t,l=mid+1;
    }
    write(res);
    return 0;
}
源文件, 语言: C++17

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 3352kb

input:

3
1
2
2

output:

? 1
? 2
? 3
! 3

result:

ok Correct position at 3

Test #2:

score: 0
Accepted
time: 0ms
memory: 3464kb

input:

10
1
2
3
3

output:

? 1
? 5
? 8
? 9
! 9

result:

ok Correct position at 9

Test #3:

score: 0
Accepted
time: 2ms
memory: 3260kb

input:

9
1
2
3
3

output:

? 1
? 5
? 7
? 8
! 8

result:

ok Correct position at 8

Test #4:

score: 0
Accepted
time: 2ms
memory: 3460kb

input:

8
1
2
3
3

output:

? 1
? 4
? 6
? 7
! 7

result:

ok Correct position at 7

Test #5:

score: 0
Accepted
time: 3ms
memory: 3356kb

input:

7
1
2
3
3

output:

? 1
? 4
? 6
? 7
! 7

result:

ok Correct position at 7

Test #6:

score: 0
Accepted
time: 1ms
memory: 3288kb

input:

6
1
2
3
3

output:

? 1
? 3
? 5
? 6
! 6

result:

ok Correct position at 6

Test #7:

score: 0
Accepted
time: 2ms
memory: 3236kb

input:

5
1
2
3
3

output:

? 1
? 3
? 4
? 5
! 5

result:

ok Correct position at 5

Test #8:

score: 0
Accepted
time: 3ms
memory: 3356kb

input:

4
1
2
3
3

output:

? 1
? 2
? 3
? 4
! 4

result:

ok Correct position at 4

Test #9:

score: 0
Accepted
time: 2ms
memory: 3360kb

input:

3
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #10:

score: 0
Accepted
time: 2ms
memory: 3328kb

input:

2
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #11:

score: 0
Accepted
time: 2ms
memory: 3304kb

input:

1

output:

! 1

result:

ok Correct position at 1

Test #12:

score: 0
Accepted
time: 3ms
memory: 3368kb

input:

1000000
1
2
3
4
5
6
7
6
7
8
7
8
9
10
11
12
13
14
15
16
16

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992188
? 988281
? 990234
? 991211
? 990722
? 990966
? 991088
? 991149
? 991180
? 991195
? 991203
? 991207
? 991209
? 991210
! 991210

result:

ok Correct position at 991210

Test #13:

score: 0
Accepted
time: 0ms
memory: 3420kb

input:

999999
1
2
3
2
3
2
1
2
3
4
3
4
5
6
7
8
9
10
11
12
12

output:

? 1
? 500000
? 750000
? 875000
? 812500
? 843750
? 828125
? 820312
? 824218
? 826171
? 827148
? 826659
? 826903
? 827025
? 827086
? 827117
? 827132
? 827140
? 827144
? 827146
? 827147
! 827147

result:

ok Correct position at 827147

Test #14:

score: 0
Accepted
time: 3ms
memory: 3276kb

input:

999998
1
2
3
2
3
2
1
2
3
4
3
4
5
6
7
8
9
10
11
12
12

output:

? 1
? 499999
? 749999
? 874999
? 812499
? 843749
? 828124
? 820311
? 824217
? 826170
? 827147
? 826658
? 826902
? 827024
? 827085
? 827116
? 827131
? 827139
? 827143
? 827145
? 827146
! 827146

result:

ok Correct position at 827146

Test #15:

score: 0
Accepted
time: 0ms
memory: 3412kb

input:

999997
1
2
3
2
3
2
1
2
3
4
3
4
5
6
7
8
9
10
11
12
12

output:

? 1
? 499999
? 749998
? 874998
? 812498
? 843748
? 828123
? 820310
? 824216
? 826169
? 827146
? 826657
? 826901
? 827023
? 827084
? 827115
? 827130
? 827138
? 827142
? 827144
? 827145
! 827145

result:

ok Correct position at 827145

Test #16:

score: 0
Accepted
time: 3ms
memory: 3220kb

input:

999996
1
2
3
2
3
2
1
2
3
4
3
4
5
6
7
8
9
10
11
12
12

output:

? 1
? 499998
? 749997
? 874997
? 812497
? 843747
? 828122
? 820309
? 824215
? 826168
? 827145
? 826656
? 826900
? 827022
? 827083
? 827114
? 827129
? 827137
? 827141
? 827143
? 827144
! 827144

result:

ok Correct position at 827144

Test #17:

score: 0
Accepted
time: 4ms
memory: 3416kb

input:

999995
1
2
3
4
5
4
3
4
5
6
5
6
7
8
9
10
11
12
13
14
14

output:

? 1
? 499998
? 749997
? 874996
? 937496
? 968746
? 953121
? 945308
? 949214
? 951167
? 952144
? 951655
? 951899
? 952021
? 952082
? 952113
? 952128
? 952136
? 952140
? 952142
? 952143
! 952143

result:

ok Correct position at 952143

Test #18:

score: 0
Accepted
time: 3ms
memory: 3224kb

input:

999994
1
2
3
4
5
4
3
4
5
6
5
6
7
8
9
10
11
12
13
14
14

output:

? 1
? 499997
? 749996
? 874995
? 937495
? 968745
? 953120
? 945307
? 949213
? 951166
? 952143
? 951654
? 951898
? 952020
? 952081
? 952112
? 952127
? 952135
? 952139
? 952141
? 952142
! 952142

result:

ok Correct position at 952142

Test #19:

score: 0
Accepted
time: 1ms
memory: 3416kb

input:

999993
1
2
3
4
5
4
3
4
5
6
5
6
7
8
9
10
11
12
13
14
14

output:

? 1
? 499997
? 749995
? 874994
? 937494
? 968744
? 953119
? 945306
? 949212
? 951165
? 952142
? 951653
? 951897
? 952019
? 952080
? 952111
? 952126
? 952134
? 952138
? 952140
? 952141
! 952141

result:

ok Correct position at 952141

Test #20:

score: 0
Accepted
time: 1ms
memory: 3300kb

input:

999992
1
2
3
4
5
4
3
4
5
6
5
6
7
8
9
10
11
12
13
14
14

output:

? 1
? 499996
? 749994
? 874993
? 937493
? 968743
? 953118
? 945305
? 949211
? 951164
? 952141
? 951652
? 951896
? 952018
? 952079
? 952110
? 952125
? 952133
? 952137
? 952139
? 952140
! 952140

result:

ok Correct position at 952140

Test #21:

score: 0
Accepted
time: 0ms
memory: 3348kb

input:

999991
1
2
3
2
3
2
1
2
3
4
3
4
5
6
7
8
9
10
11
12
12

output:

? 1
? 499996
? 749994
? 874993
? 812493
? 843743
? 828118
? 820305
? 824211
? 826164
? 827141
? 826652
? 826896
? 827018
? 827079
? 827110
? 827125
? 827133
? 827137
? 827139
? 827140
! 827140

result:

ok Correct position at 827140

Test #22:

score: 0
Accepted
time: 0ms
memory: 3300kb

input:

1000000
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
1
2
3
3

output:

? 1
? 500000
? 2
? 250000
? 3
? 125000
? 4
? 62500
? 5
? 31250
? 6
? 15625
? 7
? 7812
? 8
? 3906
? 9
? 1953
? 10
? 976
? 11
? 488
? 12
? 244
? 13
? 122
? 14
? 61
? 15
? 30
? 45
? 37
? 41
? 43
! 43

result:

ok Correct position at 43

Test #23:

score: 0
Accepted
time: 3ms
memory: 3456kb

input:

999999
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
2
3
3

output:

? 1
? 500000
? 2
? 250000
? 3
? 125000
? 4
? 62500
? 5
? 31250
? 6
? 15625
? 7
? 7812
? 8
? 3906
? 9
? 1953
? 10
? 976
? 11
? 488
? 12
? 244
? 13
? 122
? 14
? 61
? 15
? 30
? 45
? 53
? 49
? 51
! 51

result:

ok Correct position at 51

Test #24:

score: 0
Accepted
time: 1ms
memory: 3232kb

input:

999998
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
2
3
3

output:

? 1
? 499999
? 2
? 249999
? 3
? 124999
? 4
? 62499
? 5
? 31249
? 6
? 15624
? 7
? 7812
? 8
? 3906
? 9
? 1953
? 10
? 976
? 11
? 488
? 12
? 244
? 13
? 122
? 14
? 61
? 15
? 30
? 45
? 53
? 49
? 51
! 51

result:

ok Correct position at 51

Test #25:

score: 0
Accepted
time: 4ms
memory: 3296kb

input:

999997
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
3
2
3
3

output:

? 1
? 499999
? 2
? 249999
? 3
? 124999
? 4
? 62499
? 5
? 31249
? 6
? 15624
? 7
? 7812
? 8
? 3906
? 9
? 1953
? 10
? 976
? 11
? 488
? 12
? 244
? 13
? 122
? 14
? 61
? 15
? 30
? 45
? 53
? 49
? 51
! 51

result:

ok Correct position at 51

Test #26:

score: 0
Accepted
time: 3ms
memory: 3308kb

input:

1000000
1
2
3
4
5
6
7
8
9
10
11
12
13
12
11
10
11
12
11
12
12

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992188
? 996094
? 998047
? 999024
? 999512
? 999756
? 999878
? 999817
? 999786
? 999771
? 999778
? 999782
? 999780
? 999781
! 999781

result:

ok Correct position at 999781

Test #27:

score: 0
Accepted
time: 3ms
memory: 3276kb

input:

999999
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15
16
16

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992187
? 996093
? 998046
? 999023
? 999511
? 999755
? 999877
? 999938
? 999969
? 999984
? 999976
? 999980
! 999980

result:

ok Correct position at 999980

Test #28:

score: 0
Accepted
time: 3ms
memory: 3228kb

input:

999998
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15
16
16

output:

? 1
? 499999
? 749999
? 874999
? 937499
? 968749
? 984374
? 992186
? 996092
? 998045
? 999022
? 999510
? 999754
? 999876
? 999937
? 999968
? 999983
? 999975
? 999979
! 999979

result:

ok Correct position at 999979

Test #29:

score: 0
Accepted
time: 3ms
memory: 3420kb

input:

999997
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
15
16
16

output:

? 1
? 499999
? 749998
? 874998
? 937498
? 968748
? 984373
? 992185
? 996091
? 998044
? 999021
? 999509
? 999753
? 999875
? 999936
? 999967
? 999982
? 999974
? 999978
! 999978

result:

ok Correct position at 999978

Test #30:

score: 0
Accepted
time: 0ms
memory: 3288kb

input:

1000000
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
13
12
13
12
12

output:

? 1
? 500000
? 2
? 250000
? 375000
? 437500
? 468750
? 484375
? 492187
? 496093
? 498046
? 499023
? 499511
? 499755
? 499877
? 499938
? 499969
? 499953
? 499945
? 499949
? 499947
! 499947

result:

ok Correct position at 499947

Test #31:

score: 0
Accepted
time: 1ms
memory: 3300kb

input:

999999
1
2
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
1
0
1
2
1
1

output:

? 1
? 500000
? 750000
? 625000
? 2
? 562500
? 3
? 531250
? 4
? 515625
? 5
? 507812
? 6
? 503906
? 7
? 501953
? 8
? 500976
? 9
? 500488
? 10
? 500244
? 11
? 500122
? 12
? 500061
? 500091
? 500076
? 13
? 500068
? 500072
? 500070
! 500070

result:

ok Correct position at 500070

Test #32:

score: 0
Accepted
time: 4ms
memory: 3268kb

input:

999998
1
2
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
1
2
1
0
1
1

output:

? 1
? 499999
? 749999
? 624999
? 2
? 562499
? 3
? 531249
? 4
? 515624
? 5
? 507811
? 6
? 503905
? 7
? 501952
? 8
? 500975
? 9
? 500487
? 10
? 500243
? 11
? 500121
? 12
? 500060
? 500090
? 500075
? 500082
? 500078
? 13
? 500076
! 500076

result:

ok Correct position at 500076

Test #33:

score: 0
Accepted
time: 3ms
memory: 3236kb

input:

999997
1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
13
14
15
16
15
15

output:

? 1
? 499999
? 2
? 249999
? 374999
? 437499
? 468749
? 484374
? 492186
? 496092
? 498045
? 499022
? 499510
? 499754
? 499876
? 499937
? 499968
? 499952
? 499960
? 499964
? 499966
? 499965
! 499965

result:

ok Correct position at 499965

Test #34:

score: 0
Accepted
time: 4ms
memory: 3228kb

input:

1000000
1
2
3
4
5
6
7
6
7
8
7
8
9
10
11
10
11
10
9
8
8

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992188
? 988281
? 990234
? 991211
? 990722
? 990966
? 991088
? 991149
? 991180
? 991164
? 991172
? 991168
? 991166
? 991165
! 991165

result:

ok Correct position at 991165

Test #35:

score: 0
Accepted
time: 1ms
memory: 3308kb

input:

999999
1
2
1
0
1
0
1
0
1
0
1
2
3
4
3
4
5
6
7
6
7
6
5
4
4

output:

? 1
? 500000
? 750000
? 625000
? 2
? 562500
? 3
? 531250
? 4
? 515625
? 5
? 507812
? 511718
? 513671
? 514648
? 514159
? 514403
? 514525
? 514586
? 514617
? 514601
? 514609
? 514605
? 514603
? 514602
! 514602

result:

ok Correct position at 514602

Test #36:

score: 0
Accepted
time: 4ms
memory: 3276kb

input:

999998
1
2
1
0
1
0
1
0
1
0
1
2
3
4
3
4
5
6
7
6
7
6
5
4
4

output:

? 1
? 499999
? 749999
? 624999
? 2
? 562499
? 3
? 531249
? 4
? 515624
? 5
? 507811
? 511717
? 513670
? 514647
? 514158
? 514402
? 514524
? 514585
? 514616
? 514600
? 514608
? 514604
? 514602
? 514601
! 514601

result:

ok Correct position at 514601

Test #37:

score: 0
Accepted
time: 3ms
memory: 3264kb

input:

999997
1
2
3
2
1
0
1
0
1
2
3
4
3
4
5
6
7
6
7
6
5
4
4

output:

? 1
? 499999
? 749998
? 874998
? 812498
? 781248
? 2
? 765623
? 3
? 757810
? 761716
? 763669
? 764646
? 764157
? 764401
? 764523
? 764584
? 764615
? 764599
? 764607
? 764603
? 764601
? 764600
! 764600

result:

ok Correct position at 764600

Test #38:

score: 0
Accepted
time: 2ms
memory: 3236kb

input:

1000000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992188
? 996094
? 998047
? 999024
? 999512
? 999756
? 999878
? 999939
? 999970
? 999985
? 999993
? 999997
? 999999
? 1000000
! 1000000

result:

ok Correct position at 1000000

Test #39:

score: 0
Accepted
time: 4ms
memory: 3416kb

input:

999999
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992187
? 996093
? 998046
? 999023
? 999511
? 999755
? 999877
? 999938
? 999969
? 999984
? 999992
? 999996
? 999998
? 999999
! 999999

result:

ok Correct position at 999999

Test #40:

score: 0
Accepted
time: 3ms
memory: 3240kb

input:

999998
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20

output:

? 1
? 499999
? 749999
? 874999
? 937499
? 968749
? 984374
? 992186
? 996092
? 998045
? 999022
? 999510
? 999754
? 999876
? 999937
? 999968
? 999983
? 999991
? 999995
? 999997
? 999998
! 999998

result:

ok Correct position at 999998

Test #41:

score: 0
Accepted
time: 0ms
memory: 3416kb

input:

999997
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20

output:

? 1
? 499999
? 749998
? 874998
? 937498
? 968748
? 984373
? 992185
? 996091
? 998044
? 999021
? 999509
? 999753
? 999875
? 999936
? 999967
? 999982
? 999990
? 999994
? 999996
? 999997
! 999997

result:

ok Correct position at 999997

Test #42:

score: 0
Accepted
time: 3ms
memory: 3360kb

input:

1000000
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
20

output:

? 1
? 500000
? 750000
? 875000
? 937500
? 968750
? 984375
? 992188
? 996094
? 998047
? 999024
? 999512
? 999756
? 999878
? 999939
? 999970
? 999985
? 999993
? 999997
? 999999
? 1000000
! 1000000

result:

ok Correct position at 1000000

Test #43:

score: 0
Accepted
time: 0ms
memory: 3460kb

input:

1000000
0

output:

? 1
! 1

result:

ok Correct position at 1
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服务器时间: 2024-12-02 18:49:42 | 开源项目