Past AMC 10/12 Cut Off Score
Explanations of Awards[*]Average score: Average score of all participants, regardless of age, grade level, gender, and region.
[*]AIME floor: Before 2020, approximately the top 2.5% of scores on the AMC 10 and the top 5% of scores on the AMC 12 were invited to participate in AIME. Since 2020, the AIME floor has been set to a higher percentage of scores, possibly to allow a consistent number of AIME qualifiers, rather than a fixed percentage. Usually, the top 7000 competitors are qualified for the AIME.
[*]Distinction: First awarded in 2020. Awarded to top 5% of scorers on the AMC 10/12.
[*]Distinguished Honor Roll: Awarded to top 1% of scorers on the AMC 10/12.
[*]Honor Roll: Stopped in 2020. Awarded to top 5% of the scorers on the AMC 10.
2023AMC 10A
[*]Average score: Stats will come out in November 2023.
[*]AIME floor:
[*]Distinguished Honor Roll:
AMC 10B
[*]Average score:
[*]AIME floor:
[*]Distinguished Honor Roll:
AMC 12A
[*]Average score: Be patient, wait until November 2023.
[*]AIME floor:
[*]Distinguished Honor Roll:
AMC 12B
[*]Average score:
[*]AIME floor:
[*]Distinguished Honor Roll:
AMC 8
[*]Average score:
[*]Honor roll:
[*]DHR:
AIME I
[*]Average score: 4.32
[*]Median score: 4
[*]USAMO cutoff:
[*]USAJMO cutoff:
AIME II
[*]Average score: 4.37 according to Ed Vistas?
[*]Median score: 4?
[*]USAMO cutoff:
[*]USAJMO cutoff:
2022AMC 10A
[*]Average score:
[*]AIME floor: 93 (top ~8%)
[*]Distinction: 100.5
[*]Distinguished Honor Roll: 121.5
AMC 10B
[*]Average score:
[*]AIME floor: 94.5 (top ~8%)
[*]Distinction: 100.5
[*]Distinguished Honor Roll: 114
AMC 12A
[*]Average score:
[*]AIME floor: 85.5 (top ~13%)
[*]Distinction: 106.5
[*]Distinguished Honor Roll: 126
AMC 12B
[*]Average score:
[*]AIME floor: 81 (top ~15%)
[*]Distinction: 105
[*]Distinguished Honor Roll: 129
AMC 8
[*]Average score: 9.74
[*]Honor Roll: 19
[*]Distinguished Honor Roll: 22
AIME I
[*]Average score: 4.8283
[*]Median score: 4
[*]USAMO cutoff: 222 (AMC 12A), 227.5 (AMC 12B)
[*]USAJMO cutoff: 203.5 (AMC 10A), 190.5 (AMC 10B)
AIME II
[*]Average score:
[*]Median score:
[*]USAMO cutoff: 208.5 (AMC 12A), 203 (AMC 12B)
[*]USAJMO cutoff: 196.5 (AMC 10A), 182 (AMC 10B)
2021 FallAMC 10A (Wednesday, November 10)
[*]Average score: 59.63
[*]AIME floor: 96 (top 6.16%)
[*]Distinction: 100.5
[*]Distinguished Honor Roll: 117
AMC 10B (Tuesday, November 16)
[*]Average score: 56.57
[*]AIME floor: 96 (top 6.25%)
[*]Distinction: 100.5
[*]Distinguished Honor Roll: 120
AMC 12A (Wednesday, November 10)
[*]Average score: 63.65
[*]AIME floor: 91.5 (top 12.62%)
[*]Distinction: 111
[*]Distinguished Honor Roll: 130.5
AMC 12B (Tuesday, November 16)
[*]Average score: 57.37
[*]AIME floor: 84 (top 11.86%)
[*]Distinction: 103.5
[*]Distinguished Honor Roll: 130.5
Schedule ChangeIn April 2021, MAA announced they would be moving the AMC 10/12 to November, before the new year, and AMC 8 to January, after the new year; however, the AIME would remain after the new year. Thus there are two "2021 AMC 10/12s", no "2021 AMC 8", and one “2021 AIME”. All future AMC contests will follow this schedule.2021 SpringAMC 10A (Thursday, February 4)
[*]Average score: 65.53
[*]AIME floor: 103.5
[*]Distinction: 112.5
[*]Distinguished Honor Roll: 132
AMC 10B (Wednesday, February 10)
[*]Average score: 62.31
[*]AIME floor: 102
[*]Distinction: 108
[*]Distinguished Honor Roll: 126
AMC 12A (Thursday, February 4)
[*]Average score: 67.42
[*]AIME floor: 93
[*]Distinction: 114
[*]Distinguished Honor Roll: 133.5
AMC 12B (Wednesday, February 10)
[*]Average score: 61.55
[*]AIME floor: 91.5
[*]Distinction: 109.5
[*]Distinguished Honor Roll: 132
AIME I (Wednesday, March 10)
[*]Average score: 5.44
[*]Median score: 5
[*]USAMO cutoff: 229.5 (AMC 12A), 231.5 (AMC 12B)
[*]USAJMO cutoff: 217 (AMC 10A), 213 (AMC 10B)
AIME II (Thursday, March 18)
[*]Average score: 5.42
[*]Median score: 5
[*]USAMO cutoff: 238 (AMC 12A), 238 (AMC 12B)
[*]USAJMO cutoff: 223 (AMC 10A), 214.5 (AMC 10B)
2020AMC 10A
[*]Average score: 64.29
[*]AIME floor: 103.5
[*]Distinction: 105
[*]Distinguished Honor Roll: 124.5
AMC 10B
[*]Average score: 61.22
[*]AIME floor: 102
[*]Distinction: 103.5
[*]Distinguished Honor Roll: 120
AMC 12A
[*]Average score: 61.42
[*]AIME floor: 87
[*]Distinction: 100.5
[*]Distinguished Honor Roll: 123
AMC 12B
[*]Average score: 60.47
[*]AIME floor: 87
[*]Distinction: 97.5
[*]Distinguished Honor Roll: 120
AIME I
[*]Average score: 5.69
[*]Median score: 6
[*]USAMO cutoff: 233.5 (AMC 12A), 235 (AMC 12B)
[*]USAJMO cutoff: 229.5 (AMC 10A), 230 (AMC 10B)
AIME IIDue to COVID-19, the 2020 AIME II was administered online and referred to as the AOIME.
[*]Average score: 6.13
[*]Median score: 6
[*]USAMO cutoff: 234 (AMC 12A), 234.5 (AMC 12B)
[*]USAJMO cutoff: 233.5 (AMC 10A), 229.5 (AMC 10B)
AMC 8
[*]Average score: 10.00
[*]Honor Roll: 18
[*]DHR: 21
2019AMC 10A
[*]Average score: 51.66
[*]Honor roll: 96
[*]AIME floor: 103.5
[*]DHR: 123
AMC 10B
[*]Average score: 58.42
[*]Honor roll: 102
[*]AIME floor: 108
[*]Distinguished Honor Roll: 121.5
AMC 12A
[*]Average score: 49.22
[*]AIME floor: 84
[*]DHR: 121.5
AMC 12B
[*]Average score: 56.73
[*]AIME floor: 94.5
[*]DHR: 123
AIME I
[*]Average score: 5.88
[*]Median score: 6
[*]USAMO cutoff: 220 (AMC 12A), 230.5 (AMC 12B)
[*]USAJMO cutoff: 209.5 (AMC 10A), 216 (AMC 10B)
AIME II
[*]Average score: 6.47
[*]Median score: 6
[*]USAMO cutoff: 230.5 (AMC 12A), 236 (AMC 12B)
[*]USAJMO cutoff: 216.5 (AMC 10A), 220.5 (AMC 10B)
AMC 8
[*]Average score: 9.43
[*]Honor roll: 19
[*]DHR: 23
2018AMC 10A
[*]Average score: 53.84
[*]Honor roll: 100.5
[*]AIME floor: 111
[*]DHR: 127.5
AMC 10B
[*]Average score: 57.81
[*]Honor roll: 97.5
[*]AIME floor: 108
[*]DHR: 123
AMC 12A
[*]Average score: 56.36
[*]AIME floor: 93
[*]DHR: 120
AMC 12B
[*]Average score: 57.85
[*]AIME floor: 99
[*]DHR: 126
AIME I
[*]Average score: 5.09
[*]Median score: 5
[*]USAMO cutoff: 215 (AMC 12A), 235 (AMC 12B)
[*]USAJMO cutoff: 222 (AMC 10A), 212 (AMC 10B)
AIME II
[*]Average score: 5.48
[*]Median score: 5
[*]USAMO cutoff: 216 (AMC 12A), 230.5 (AMC 12B)
[*]USAJMO cutoff: 222 (AMC 10A), 212 (AMC 10B)
AMC 8
[*]Average score: 8.51
[*]Honor roll: 15
[*]DHR: 19
2017AMC 10A
[*]AIME floor: 112.5
[*]DHR: 127.5
[*]HR: 112.5
[*]Mean: 59.33
[*]Median: 55.5
AMC 10B
[*]AIME floor: 120
[*]DHR: 136.5
[*]HR: 120
[*]Mean: 66.56
[*]Median: 61.5
AMC 12A
[*]AIME floor: 96
[*]DHR: 115.5
[*]HR: 96
[*]Mean: 57.0
[*]Median: 52.5
AMC 12B
[*]AIME floor: 100
[*]DHR: 129
[*]HR: 100.5
[*]Mean: 58.35
[*]Median: 54
AIME I
[*]USAMO floor: 225.5 (AMC 12A), 235 (AMC 12B)
[*]USAJMO floor: 224.5 (AMC 10A), 233 (AMC 10B)
[*]Mean: 5.69
[*]Median: 5
AIME II
[*]USAMO floor: 221 (AMC 12A), 230.5 (AMC 12B)
[*]USAJMO floor: 219 (AMC 10A), 225 (AMC 10B)
[*]Mean: 5.64
[*]Median: 5
USAJMO
[*]Participants: 208
USAMO
[*]Participants: 280
AMC 8
[*]DHR: 20
[*]HR: 17
[*]Mean: 8.96
2016AMC 10A
[*]Average score: 65.31
[*]AIME floor: 110
[*]DHR: 120
AMC 10B
[*]Average score: 65.40
[*]AIME floor: 110
[*]DHR: 124.5
AMC 12A
[*]Average score: 60.32
[*]AIME floor: 93
[*]DHR: 111
AMC 12B
[*]Average score: 68.65
[*]AIME floor: 100.5
[*]DHR: 127.5
AIME I
[*]Average score: 5.83
[*]Median score: 6
[*]USAMO cutoff: 220
[*]USAJMO cutoff: 210.5
AIME II
[*]Average score: 4.43
[*]Median score: 4
[*]USAMO cutoff: 205
[*]USAJMO cutoff: 200
AMC 8
[*]Average score: 9.36
[*]Honor roll: 18
[*]DHR: 22
2015AMC 10A
[*]Average score: 73.39
[*]AIME floor: 106.5
[*]DHR: 115.5
AMC 10B
[*]Average score: 76.09
[*]AIME floor: 120
[*]DHR: 132
AMC 12A
[*]Average score: 69.90
[*]AIME floor: 99
[*]DHR: 117
AMC 12B
[*]Average score: 66.88
[*]AIME floor: 100.5
[*]DHR: 126
AIME I
[*]Average score: 5.29
[*]Median score: 5
[*]USAMO cutoff: 219.0
[*]USAJMO cutoff: 213.0
AIME II
[*]Average score: 6.63
[*]Median score: 6
[*]USAMO cutoff: 229.0
[*]USAJMO cutoff: 223.5
AMC 8
[*]Average score: 8.55
[*]Honor roll: 16
[*]DHR: 21
2014AMC 10A
[*]Average score: 63.34
[*]AIME floor: 120
[*]DHR: 132
AMC 10B
[*]Average score: 71.42
[*]AIME floor: 120
[*]DHR: 132
AMC 12A
[*]Average score: 63.60
[*]AIME floor: 93
[*]DHR: 109.5
AMC 12B
[*]Average score: 68.12
[*]AIME floor: 100.5
[*]DHR: 121.5
AIME I
[*]Average score: 4.88
[*]Median score: 5
[*]USAMO cutoff: 211.5
[*]USAJMO cutoff: 211
AIME II
[*]Average score: 5.49
[*]Median score: 5
[*]USAMO cutoff: 211.5
[*]USAJMO cutoff: 211
AMC 8
[*]Average score: 11.43
[*]Honor roll: 19
[*]DHR: 23
2013AMC 10A
[*]Average score: 72.50
[*]AIME floor: 108
[*]DHR: 117
AMC 10B
[*]Average score: 72.62
[*]AIME floor: 120
[*]DHR: 129
AMC 12A
[*]Average score: 65.06
[*]AIME floor: 88.5
[*]DHR: 106.5
AMC 12B
[*]Average score: 64.21
[*]AIME floor: 93
[*]DHR: 108
AIME I
[*]Average score: 4.69
[*]Median score: 4
[*]USAMO cutoff: 209
[*]USAJMO cutoff: 210.5
AIME II
[*]Average score: 6.56
[*]Median score: 6
[*]USAMO cutoff: 209
[*]USAJMO cutoff: 210.5
AMC 8
[*]Average score: 10.69
[*]Honor roll: 18
[*]DHR: 22
2012AMC 10A
[*]Average score: 72.51
[*]AIME floor: 115.5
[*]DHR: 121.5
AMC 10B
[*]Average score: 76.59
[*]AIME floor: 120
[*]DHR: 133.5
AMC 12A
[*]Average score: 64.62
[*]AIME floor: 94.5
[*]DHR: 109.5
AMC 12B
[*]Average score: 70.08
[*]AIME floor: 99
[*]DHR: 114
AIME I
[*]Average score: 5.13
[*]Median score: 5
[*]USAMO cutoff: 204.5
[*]USAJMO cutoff: 204
AIME II
[*]Average score: 4.94
[*]Median score: 5
[*]USAMO cutoff: 204.5
[*]USAJMO cutoff: 204
AMC 8
[*]Average score: 10.67
[*]Honor roll: 18
[*]DHR: 22
2011AMC 10A
[*]AIME floor: 117
[*]DHR: 129
[*]HR: 117
[*]Mean: 64.24
AMC 10B
[*]AIME floor: 117
[*]DHR: 133.5
[*]HR: 117
[*]Mean: 71.78
AMC 12A
[*]AIME floor: 93
[*]DHR: 112.5
[*]HR: 92
[*]Mean: 65.38
AMC 12B
[*]AIME floor: 97.5
[*]DHR: 121.5
[*]HR: 92
[*]Mean: 64.71
AIME I
[*]USAMO floor: 188
[*]USAJMO floor: 179
[*]Mean: 2.23
[*]Median: 2
AIME II
[*]USAMO floor: 215.5
[*]USAJMO floor: 196.5
[*]Mean: 5.47
[*]Median: 5
USAJMO
[*]Participants: 222
USAMO
[*]Participants: 282
AMC 8
[*]DHR: 22
[*]HR: 17
[*]Mean: 10.75
2010AMC 10A
[*]AIME floor: 118.5
[*]AIME qualifiers: 960 (1.5%)
[*]DHR: 121.5
[*]HR: 118.5
[*]Mean: 70.8
AMC 10B
[*]AIME floor: 118.5
[*]AIME qualifiers: 770 (2.0%)
[*]DHR: 124.5
[*]HR: 118.5
[*]Mean: 68.3
AMC 12A
[*]AIME floor: 88.5
[*]AIME qualifiers: 4874 (7.1%)
[*]DHR: 108
[*]HR: 88.5
[*]Mean: 62.5
AMC 12B
[*]AIME floor: 88.5
[*]AIME qualifiers: 3270 (8.0%)
[*]DHR: 108
[*]HR: 88.5
[*]Mean: 59.8
AIME I
[*]Mean: 4.12
[*]Median: 3
[*]Participants: 3618
AIME II
[*]Mean: 5.91
[*]Median: 6
[*]Participants: 2904
USAJMO
[*]USAJMO floor: 188.5 Index or 11 AIME
[*]Participants: 235
USAMO
[*]USAMO floor: 208.5 (204.5 for non juniors and seniors)
[*]Participants: 328
AMC 8
[*]DHR: 22
[*]HR: 17
[*]Mean: 9.59
2009AMC 10A
[*]AIME floor: 120
[*]AIME qualifiers: 3045 (4.2%)
[*]DHR: 133.5
[*]HR: 120
[*]Mean: 70.4
AMC 10B
[*]AIME floor: 120
[*]AIME qualifiers: 2365 (7.5%)
[*]DHR: 141
[*]HR: 124.5
[*]Mean: 74.4
AMC 12A
[*]AIME floor: 97.5
[*]AIME qualifiers: 5614 (6.7%)
[*]DHR: 117
[*]HR: 100.5
[*]Mean: 68.0
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 3723 (10.8%)
[*]DHR: 124.5
[*]HR: 108
[*]Mean: 71.7
AIME I
[*]Mean: 4.17
[*]Median: 4
AIME II
[*]Mean: 3.27
[*]Median: 3
USAMO
[*]USAMO floor: 201 Index or (7 AIME and 215 Index)
[*]Participants: 514
AMC 8
[*]DHR: 20
[*]HR: 17
[*]Mean: 10.28
2008AMC 10A
[*]AIME floor: 117
[*]AIME qualifiers: 1765 (2.6%)
[*]DHR: 127.5
[*]HR: 100.5
[*]Mean: 58.1
AMC 10B
[*]AIME floor: 120
[*]AIME qualifiers: 933 (2.7%)
[*]DHR: 127.5
[*]HR: 100.5
[*]Mean: 66.6
AMC 12A
[*]AIME floor: 97.5
[*]AIME qualifiers: 5183 (6.5%)
[*]DHR: 120
[*]HR: 97.5
[*]Mean: 65.6
AMC 12B
[*]AIME floor: 97.5
[*]AIME qualifiers: 3367 (8.1%)
[*]DHR: 120
[*]HR: 97.5
[*]Mean: 68.9
AIME I
[*]Mean: 4.77
[*]Median: 4
AIME II
[*]Mean: 5.27
[*]Median: 5
USAMO
[*]USAMO floor: 204 (215 Index with 7 AIME for non juniors and seniors)
[*]Participants: 503
AMC 8
[*]DHR: 22
[*]HR: 19
[*]Mean: 11.45
2007AMC 10A
[*]Average score: 67.9
[*]AIME floor: 117
AMC 10B
[*]Average score: 61.5
[*]AIME floor: 115.5
AMC 12A
[*]Average score: 66.8
[*]AIME floor: 97.5
AMC 12B
[*]Average score: 73.1
[*]AIME floor: 100
AIME I
[*]Average score: 5
[*]Median score: 3
[*]USAMO floor: 6
AIME II
[*]Average score:
[*]Median score:
[*]USAMO floor:
AMC 8
[*]Average score: 9.87
[*]Honor roll: 17
[*]DHR: 21
2006AMC 10A
[*]AIME floor: 120
[*]AIME qualifiers: 1680 (2.7%)
[*]Mean: 79.0
AMC 10B
[*]AIME floor: 120
[*]AIME qualifiers: 870 (2.3%)
[*]Mean: 68.5
AMC 12A
[*]AIME floor: 100
[*]AIME qualifiers: 17118 (22.3%)
[*]Mean: 85.7
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 10654 (21.2%)
[*]Mean: 85.5
AIME I
[*]Participants:
[*]Mean:
AIME II
[*]Participants:
[*]Mean:
USAMO
[*]AMC 12 USAMO floor: 217 Index
[*]AMC 10 USAMO floor: 8 AIME
[*]Participants: 432
AMC 8
[*]DHR: 21
[*]HR: 17
2005AMC 10A
[*]AIME floor: 120
[*]AIME qualifiers: 1258 (1.9%)
[*]DHR: 120
[*]HR: 100
[*]Mean: 74.7
AMC 10B
[*]AIME floor: 120
[*]AIME qualifiers: 555 (1.6%)
[*]DHR: 120
[*]HR: 100
[*]Mean: 77.9
AMC 12A
[*]AIME floor: 100
[*]AIME qualifiers: 9441 (11.2%)
[*]DHR: 120
[*]HR: 100
[*]Mean: 78.7
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 5692 (12.8%)
[*]DHR: 120
[*]HR: 100
[*]Mean: 83.4
AIME I
[*]AMC 12 USAMO floor: 233 Index
[*]Participants: 11197
[*]Mean: 2.754
AIME II
[*]AMC 12 USAMO floor: 220.5 Index
[*]Participants: 1279
[*]Mean: 2.439
USAMO
[*]AMC 10 USAMO floor: 9 AIME
[*]Participants: 259
AMC 8
[*]DHR: 20
[*]HR: 16
2004AMC 10A
[*]AIME floor: 110
[*]AIME qualifiers: 1118 (1.4%)
[*]DHR: 112.5
[*]HR: 100
[*]Mean: 69.1
AMC 10B
[*]AIME floor: 115
[*]AIME qualifiers: 487 (2.1%)
[*]DHR: 126
[*]HR: 100
[*]Mean: 80.4
AMC 12A
[*]AIME floor: 100
[*]AIME qualifiers: 8401 (8.1%)
[*]DHR: 117
[*]HR: 100
[*]Mean: 73.9
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 6036 (19.2%)
[*]DHR: 123
[*]HR: 100
[*]Mean: 84.5
AIME I
[*]Participants: 9824
[*]Mean: 2.246
AIME II
[*]Participants: 2121
[*]Mean: 1.959
USAMO
[*]AMC 12 USAMO floor: 210 Index
[*]AMC 10 USAMO floor: 7 AIME
[*]Participants: 261
AMC 8
[*]DHR: 21
[*]HR: 17
2003AMC 10A
[*]AIME floor: 119
[*]AIME qualifiers: 1534 (2.0%)
[*]Mean: 74.4
AMC 10B
[*]AIME floor: 121
[*]AIME qualifiers: 350 (1.2%)
[*]Mean: 79.6
AMC 12A
[*]AIME floor: 100
[*]AIME qualifiers: 12089 (12.2%)
[*]Mean: 77.8
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 3812 (9.6%)
[*]Mean: 76.6
AIME I
[*]AMC 12 USAMO floor: 226 Index
[*]AMC 10 USAMO floor: 8 AIME
[*]Participants:
[*]Mean:
AIME II
[*]AMC 12 USAMO floor: 226 Index
[*]AMC 10 USAMO floor: 8 AIME
[*]Participants:
[*]Mean:
USAMO
[*]Participants: 250
AMC 8
[*]DHR: 22
[*]HR: 18
2002AMC 10A
[*]AIME floor: 115
[*]AIME qualifiers: 921 (1.2%)
[*]Mean: 68.5
AMC 10B
[*]AIME floor: 118
[*]AIME qualifiers: 374 (1.5%)
[*]Mean: 74.9
AMC 12A
[*]AIME floor: 100
[*]AIME qualifiers: 7525 (7.2%)
[*]Mean: 72.7
AMC 12B
[*]AIME floor: 100
[*]AIME qualifiers: 5666 (16.8%)
[*]Mean: 80.8
AIME I
[*]Participants:
[*]Mean:
AIME II
[*]Participants:
[*]Mean:
USAMO
[*]AMC 12 USAMO floor: 210 Index
[*]AMC 10 USAMO floor: 6 AIME
[*]Participants: 326
2001AMC 10
[*]AIME floor: 116
[*]AIME qualifiers: 1790 (1.7%)
[*]Mean: 67.8
AMC 12
[*]AIME floor: 84
[*]AIME qualifiers: 9030 (3.4%)
[*]Mean: 56.6
AIME I
[*]Participants:
[*]Mean:
AIME II
[*]Participants:
[*]Mean:
USAMO
[*]AMC 12 USAMO floor: 213 Index
[*]AMC 10 USAMO floor: 7 AIME
[*]Participants: 268
2000AMC 10
[*]AIME floor: 110
[*]AIME qualifiers: 3892
[*]Mean: 64.2
AMC 12
[*]AIME floor: 92
[*]AIME qualifiers: 9260 (3.3%)
[*]Mean: 64.9
AIME I
[*]Participants:
[*]Mean:
AIME II
[*]Participants:
[*]Mean:
USAMO
[*]Grade 12 USAMO floor: 212 Index
[*]Grade 11 USAMO floor: 204 Index
[*]Grade 10 USAMO floor: 174 Index, 8 AIME
[*]Grade 9 USAMO floor: 164 Index, 7 AIME
[*]Participants: 239
【from： https://artofproblemsolving.com/ ... cal_results#AMC_10A】
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