codechef contest 138 all solution

2:26:03

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1:12

1:02

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52:03

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39:57

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1:02:35

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58:06

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6:26

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1:11:45

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1:14:42

1:02

17:02

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1:09:11

2:13

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8:22

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1:17

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11:53