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jal
1b350a47fe
如果是偶数,必定可以分成两个偶合数之和。如果是奇数,必定可以分为一奇一偶,大于2的偶数一定为合数,只要找一个奇合数即可,最小的是9,所以另一数为x-9,由于x>=12,所以x-9>=3
5 years ago