I need some problems that use the 'on Exchange arguments' method technique.
Difference between en1 and en2, changed 27 character(s)
**Problems from AtCoder and Codeforces are both fine, preferably those where the 'Exchange arguments' method is used to optimize greedy algorithms.**↵
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Thanks~

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en2 English _Tyrue_ 2024-10-31 02:36:12 27
en1 English _Tyrue_ 2024-10-10 12:08:16 222 Initial revision (published)