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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
#109718#6394. Turn on the LightKING_OF_TURTLEAC ✓4ms3844kbC++14553b2023-05-30 14:45:322023-05-30 14:45:33

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.
  • [2023-05-30 14:45:33]
  • 评测
  • 测评结果：AC
  • 用时：4ms
  • 内存：3844kb
查看
  • [2023-05-30 14:45:32]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
int n;
int ask(int x){printf("? %d\n",x);fflush(stdout);int res;scanf("%d",&res);return res;}
void ans(int x){printf("! %d\n",x);fflush(stdout);}
int main()
{
	scanf("%d",&n);
	int lst=ask(1);
	if(!lst)return ans(1),0;
	int l=2,r=n,mid;
	while(l<=r)
	{
		mid=((l+r)>>1);
		int nxt=ask(mid);
		if(nxt==lst)return ans(mid),0;
		if(nxt>lst)l=mid+1;
		else 
		{
			r=mid-1;
			if(nxt==0)
			{
				nxt=ask(l);
				if(!nxt)return ans(l),0;
				++l;
			}
		}
		lst=nxt;
	}
	return 0;
}
源文件, 语言: C++14

详细

Test #1:

score: 100
Accepted
time: 2ms
memory: 3828kb

input:

3
1
2
2

output:

? 1
? 2
? 3
! 3

result:

ok Correct position at 3

Test #2:

score: 0
Accepted
time: 0ms
memory: 3548kb

input:

10
1
0
1
0
0

output:

? 1
? 6
? 2
? 4
? 3
! 3

result:

ok Correct position at 3

Test #3:

score: 0
Accepted
time: 0ms
memory: 3664kb

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: 3604kb

input:

8
1
0
1
1

output:

? 1
? 5
? 2
? 3
! 3

result:

ok Correct position at 3

Test #5:

score: 0
Accepted
time: 2ms
memory: 3604kb

input:

7
1
2
3
3

output:

? 1
? 4
? 6
? 7
! 7

result:

ok Correct position at 7

Test #6:

score: 0
Accepted
time: 0ms
memory: 3676kb

input:

6
1
0
1
1

output:

? 1
? 4
? 2
? 3
! 3

result:

ok Correct position at 3

Test #7:

score: 0
Accepted
time: 2ms
memory: 3628kb

input:

5
1
2
3
3

output:

? 1
? 3
? 4
? 5
! 5

result:

ok Correct position at 5

Test #8:

score: 0
Accepted
time: 2ms
memory: 3616kb

input:

4
1
1

output:

? 1
? 3
! 3

result:

ok Correct position at 3

Test #9:

score: 0
Accepted
time: 2ms
memory: 3680kb

input:

3
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #10:

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

input:

2
1
1

output:

? 1
? 2
! 2

result:

ok Correct position at 2

Test #11:

score: 0
Accepted
time: 2ms
memory: 3828kb

input:

1
0

output:

? 1
! 1

result:

ok Correct position at 1

Test #12:

score: 0
Accepted
time: 3ms
memory: 3656kb

input:

1000000
1
0
1
2
3
2
1
0
1
2
1
0
1
2
1
2
3
4
5
6
5
4
4

output:

? 1
? 500001
? 2
? 250001
? 375001
? 437501
? 406251
? 390626
? 375002
? 382814
? 386720
? 384767
? 382815
? 383791
? 384279
? 384035
? 384157
? 384218
? 384248
? 384263
? 384271
? 384267
? 384265
! 384265

result:

ok Correct position at 384265

Test #13:

score: 0
Accepted
time: 4ms
memory: 3624kb

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: 4ms
memory: 3812kb

input:

999998
1
0
1
0
1
0
1
0
1
2
3
4
5
6
5
6
7
8
9
8
9
8
9
8
8

output:

? 1
? 500000
? 2
? 250001
? 3
? 125002
? 4
? 62503
? 5
? 31254
? 46878
? 54690
? 58596
? 60549
? 61526
? 61037
? 61281
? 61403
? 61464
? 61495
? 61479
? 61487
? 61483
? 61485
? 61484
! 61484

result:

ok Correct position at 61484

Test #15:

score: 0
Accepted
time: 4ms
memory: 3584kb

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: 2ms
memory: 3676kb

input:

999996
1
0
1
2
3
2
1
0
1
2
1
0
1
2
1
2
3
4
5
6
5
4
4

output:

? 1
? 499999
? 2
? 250000
? 374999
? 437499
? 406249
? 390624
? 375000
? 382812
? 386718
? 384765
? 382813
? 383789
? 384277
? 384033
? 384155
? 384216
? 384246
? 384261
? 384269
? 384265
? 384263
! 384263

result:

ok Correct position at 384263

Test #17:

score: 0
Accepted
time: 1ms
memory: 3620kb

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: 2ms
memory: 3832kb

input:

999994
1
0
1
0
1
2
3
2
1
2
3
4
5
6
7
8
9
10
11
10
9
10
10

output:

? 1
? 499998
? 2
? 250000
? 3
? 125001
? 187500
? 218750
? 203125
? 195312
? 199218
? 201171
? 202148
? 202636
? 202880
? 203002
? 203063
? 203094
? 203109
? 203117
? 203113
? 203111
? 203112
! 203112

result:

ok Correct position at 203112

Test #19:

score: 0
Accepted
time: 3ms
memory: 3836kb

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: 4ms
memory: 3540kb

input:

999992
1
0
1
2
3
4
3
2
3
4
5
4
5
6
7
8
9
10
11
10
11
11

output:

? 1
? 499997
? 2
? 249999
? 374998
? 437497
? 468747
? 453122
? 445309
? 449215
? 451168
? 452145
? 451656
? 451900
? 452022
? 452083
? 452114
? 452129
? 452137
? 452141
? 452139
? 452140
! 452140

result:

ok Correct position at 452140

Test #21:

score: 0
Accepted
time: 3ms
memory: 3616kb

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: 1ms
memory: 3572kb

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
0
1
2
3
4
5
5

output:

? 1
? 500001
? 2
? 250001
? 3
? 125002
? 4
? 62503
? 5
? 31254
? 6
? 15630
? 7
? 7818
? 8
? 3913
? 9
? 1961
? 10
? 985
? 11
? 498
? 12
? 255
? 13
? 134
? 14
? 74
? 15
? 44
? 16
? 30
? 37
? 40
? 42
? 43
! 43

result:

ok Correct position at 43

Test #23:

score: 0
Accepted
time: 4ms
memory: 3680kb

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
1
1

output:

? 1
? 500000
? 2
? 250001
? 3
? 125002
? 4
? 62503
? 5
? 31254
? 6
? 15630
? 7
? 7818
? 8
? 3913
? 9
? 1961
? 10
? 985
? 11
? 498
? 12
? 255
? 13
? 134
? 14
? 74
? 15
? 44
? 59
? 51
! 51

result:

ok Correct position at 51

Test #24:

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

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
1
1

output:

? 1
? 500000
? 2
? 250001
? 3
? 125002
? 4
? 62503
? 5
? 31254
? 6
? 15630
? 7
? 7818
? 8
? 3913
? 9
? 1961
? 10
? 985
? 11
? 498
? 12
? 255
? 13
? 134
? 14
? 74
? 15
? 44
? 59
? 51
! 51

result:

ok Correct position at 51

Test #25:

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

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
1
1

output:

? 1
? 499999
? 2
? 250000
? 3
? 125001
? 4
? 62502
? 5
? 31253
? 6
? 15629
? 7
? 7818
? 8
? 3913
? 9
? 1961
? 10
? 985
? 11
? 498
? 12
? 255
? 13
? 134
? 14
? 74
? 15
? 44
? 59
? 51
! 51

result:

ok Correct position at 51

Test #26:

score: 0
Accepted
time: 3ms
memory: 3816kb

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
? 500001
? 750001
? 875001
? 937501
? 968751
? 984376
? 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: 2ms
memory: 3604kb

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: 3844kb

input:

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

output:

? 1
? 500000
? 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: 3604kb

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: 4ms
memory: 3768kb

input:

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

output:

? 1
? 500001
? 2
? 250001
? 375001
? 437501
? 468751
? 484376
? 492188
? 496094
? 498047
? 499024
? 499512
? 499756
? 499878
? 499939
? 499970
? 499954
? 499946
? 499950
? 499948
? 499947
! 499947

result:

ok Correct position at 499947

Test #31:

score: 0
Accepted
time: 0ms
memory: 3764kb

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
0
1
2
3
4
5
6
6

output:

? 1
? 500000
? 750000
? 625000
? 500001
? 562500
? 500002
? 531251
? 500003
? 515627
? 500004
? 507815
? 500005
? 503910
? 500006
? 501958
? 500007
? 500982
? 500008
? 500495
? 500009
? 500252
? 500010
? 500131
? 500011
? 500071
? 500012
? 500041
? 500056
? 500063
? 500067
? 500069
? 500070
! 500070

result:

ok Correct position at 500070

Test #32:

score: 0
Accepted
time: 3ms
memory: 3664kb

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
0
1
0
1
1

output:

? 1
? 500000
? 749999
? 624999
? 500001
? 562500
? 500002
? 531251
? 500003
? 515627
? 500004
? 507815
? 500005
? 503910
? 500006
? 501958
? 500007
? 500982
? 500008
? 500495
? 500009
? 500252
? 500010
? 500131
? 500011
? 500071
? 500101
? 500086
? 500072
? 500079
? 500073
? 500076
! 500076

result:

ok Correct position at 500076

Test #33:

score: 0
Accepted
time: 3ms
memory: 3652kb

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
? 250000
? 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: 3ms
memory: 3832kb

input:

1000000
1
0
1
2
1
0
1
2
1
2
3
4
3
4
5
6
7
6
7
6
5
4
4

output:

? 1
? 500001
? 2
? 250001
? 375001
? 312501
? 250002
? 281251
? 296876
? 289063
? 292969
? 294922
? 295899
? 295410
? 295654
? 295776
? 295837
? 295868
? 295852
? 295860
? 295856
? 295854
? 295853
! 295853

result:

ok Correct position at 295853

Test #35:

score: 0
Accepted
time: 2ms
memory: 3592kb

input:

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

output:

? 1
? 500000
? 750000
? 625000
? 500001
? 562500
? 593750
? 578125
? 562501
? 570313
? 562502
? 566407
? 568360
? 567383
? 567871
? 568115
? 568237
? 568298
? 568329
? 568313
? 568321
? 568317
? 568315
? 568314
! 568314

result:

ok Correct position at 568314

Test #36:

score: 0
Accepted
time: 4ms
memory: 3544kb

input:

999998
1
0
1
0
1
0
1
0
1
0
1
0
1
2
1
0
1
0
1
2
1
0
1
2
3
4
3
2
1
1

output:

? 1
? 500000
? 2
? 250001
? 3
? 125002
? 4
? 62503
? 5
? 31254
? 6
? 15630
? 7
? 7818
? 11724
? 9771
? 7819
? 8795
? 7820
? 8307
? 8551
? 8429
? 8308
? 8368
? 8398
? 8413
? 8421
? 8417
? 8415
? 8414
! 8414

result:

ok Correct position at 8414

Test #37:

score: 0
Accepted
time: 1ms
memory: 3548kb

input:

999997
1
2
3
2
1
0
1
2
3
4
5
4
5
6
7
8
7
8
7
6
5
5

output:

? 1
? 499999
? 749998
? 874998
? 812498
? 781248
? 749999
? 765623
? 773435
? 777341
? 779294
? 780271
? 779782
? 780026
? 780148
? 780209
? 780240
? 780224
? 780232
? 780228
? 780226
? 780225
! 780225

result:

ok Correct position at 780225

Test #38:

score: 0
Accepted
time: 2ms
memory: 3672kb

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
? 500001
? 750001
? 875001
? 937501
? 968751
? 984376
? 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: 3ms
memory: 3628kb

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: 3612kb

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
? 500000
? 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: 3544kb

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: 3600kb

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
? 500001
? 750001
? 875001
? 937501
? 968751
? 984376
? 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: 1ms
memory: 3604kb

input:

1000000
0

output:

? 1
! 1

result:

ok Correct position at 1
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服务器时间: 2024-12-11 22:00:57 | 开源项目