permutation difference sum

2 secs 1024 MB
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3_random_4.txt
3_random_5.txt
3_random_6.txt
3_random_7.txt
3_random_8.txt
3_random_9.txt
3_random_10.txt
1_sample_1.txt
1_sample_2.txt
3_random_1.txt
3_random_2.txt
3_random_3.txt