Testcase very weak

In yesterday contest chefship qustion was having weak test cases thats why many people submitted there o(n^2) solution and it get passed .
any response from test case builder ???

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They responded on the editorial thread. It seems to be an honest mistake. Its wrong, but it does happen. Don’t ponder too much over it.

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Bro you are right , but it seems to be very common in codechef that test cases are quite weak .even in icpc online round 2019 test case of 3rd question was such weak that normal brute force passes the solution.