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CF1770
vp。
2023-01-01
题解
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CF1731
vp。
简单场。
2022-12-28
题解
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CF1774
差 5 分上橙。
pw[0] = 1; for(int i = 2; i < 40; i++) pw[i] = pw[i - 1] * 2ll % mod;
2022-12-18
题解
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CF1767
vp。
2022-12-17
题解
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