データセット

答えは87番目のデータ。
下をコピペして、半角スペース区切りで読み込む。

data0 <- read.delim("clipboard", sep=" ", header=FALSE)
cols <- rep(1, nrow(data0))
cols[87] <- 2
69.613 129.070 52.111
70.670 128.161 52.446
72.303 128.450 52.853
73.759 127.522 51.786
74.085 129.067 53.352
74.561 134.031 50.992
74.911 134.944 50.744
75.205 129.162 52.800
75.395 129.711 52.844
75.554 132.642 51.427
75.768 129.197 52.889
75.952 132.470 50.911
75.967 133.728 51.120
76.099 129.064 52.816
76.682 128.997 52.873
76.911 127.382 51.565
76.970 129.852 51.915
77.018 133.704 52.314
77.019 133.473 49.721
77.099 133.054 50.467
77.197 132.207 49.899
77.468 129.459 54.391
77.643 129.903 52.482
77.690 129.392 52.556
77.708 129.656 53.150
77.856 131.374 53.714
77.869 130.163 52.629
78.213 129.002 52.317
78.253 130.941 53.161
78.293 134.205 51.814
78.320 129.532 53.430
78.475 133.403 50.961
78.551 130.436 53.698
78.631 129.042 52.699
78.676 131.111 52.887
78.852 129.980 52.419
79.014 129.745 52.807
79.220 129.447 53.256
79.489 132.855 49.702
79.580 133.064 51.251
79.813 133.473 51.478
79.869 130.581 52.947
79.925 134.180 50.823
80.171 130.207 52.652
80.227 131.149 52.311
80.307 134.467 51.245
80.473 129.343 52.461
80.525 134.435 51.083
80.530 134.094 51.576
80.556 134.785 50.502
80.715 133.517 51.044
80.725 129.764 52.577
80.797 129.924 53.835
80.866 130.324 53.287
80.928 134.996 50.980
80.953 133.532 50.797
80.963 130.601 52.701
81.045 129.631 52.507
81.102 128.639 52.739
81.237 129.760 53.419
81.267 131.651 53.440
81.348 130.074 53.408
81.403 132.993 49.588
81.475 129.449 52.345
81.699 129.332 52.376
81.701 134.273 51.165
81.900 130.044 52.689
81.908 131.236 53.640
81.932 129.558 52.862
81.975 135.268 50.798
82.016 130.484 52.733
82.029 130.408 53.343
82.065 132.823 52.329
82.173 129.472 52.796
82.322 134.010 50.775
82.479 129.161 52.753
82.583 130.883 54.363
82.721 130.410 53.036
83.023 130.359 51.739
83.046 130.478 52.782
83.087 134.123 50.844
83.167 130.775 52.985
83.372 133.594 50.560
83.432 130.874 53.903
83.570 130.994 53.408
84.128 130.554 53.247
84.406 129.347 50.527
84.491 130.682 54.178
85.041 130.009 54.102
85.220 130.239 53.204
85.291 131.542 54.305
85.639 130.069 53.854
85.846 135.761 51.198
85.847 135.880 51.605
85.946 131.570 53.754
86.519 131.226 53.990
86.632 134.467 50.856
87.459 130.651 53.682
88.150 134.094 51.032
89.907 131.723 52.932