[ImgBot] Optimize images - #1

*Total -- 18,211.21kb -> 13,787.47kb (24.29%)

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/content/english/hpc/external-memory/img/list-ranking.png -- 15.63kb -> 3.52kb (77.51%)
/content/english/hpc/external-memory/img/k-way.png -- 15.25kb -> 3.62kb (76.29%)
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/content/russian/cs/range-queries/img/prefix-sum.png -- 5.28kb -> 2.08kb (60.58%)
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/content/russian/cs/algebra/img/fft-shuffle.png -- 90.48kb -> 67.94kb (24.91%)
/static/img/bst.png -- 47.18kb -> 35.77kb (24.18%)
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/content/english/hpc/simd/img/gather-scatter.png -- 65.18kb -> 50.16kb (23.04%)
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/content/english/hpc/cpu-cache/img/address.png -- 6.59kb -> 5.27kb (20.05%)
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/content/english/hpc/cpu-cache/img/cache1.png -- 44.12kb -> 36.17kb (18.02%)
/content/english/hpc/arithmetic/img/iq.svg -- 19.48kb -> 15.99kb (17.91%)
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/content/english/hpc/algorithms/img/rho.jpg -- 14.23kb -> 11.82kb (16.96%)
/content/russian/cs/factorization/img/rho.jpg -- 14.23kb -> 11.82kb (16.96%)
/content/russian/cs/geometry-basic/img/trapeze.jpg -- 17.92kb -> 14.93kb (16.67%)
/content/english/hpc/arithmetic/img/complex-plane.png -- 74.39kb -> 62.38kb (16.15%)
/content/english/hpc/arithmetic/img/iq.jpg -- 281.76kb -> 238.44kb (15.38%)
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/content/english/hpc/complexity/img/die-shot.jpg -- 2,223.45kb -> 1,931.07kb (13.15%)
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