Special Offer! Super Price 999 Bourles! Time Limit:1000MS Memory Limit:262144KB 64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 219B Description Polycarpus is an amateur businessman. Recently he was surprised to find out that…
Description Polycarpus is an amateur businessman. Recently he was surprised to find out that the market for paper scissors is completely free! Without further ado, Polycarpus decided to start producing and selling such scissors. Polycaprus calculated…
A. k-String 统计每个字母出现次数即可. B. Special Offer! Super Price 999 Bourles! 枚举末尾有几个9,注意不要爆掉\(long\ long\)的范围. C. Color Stripe 当\(k\gt 2\)时,若\(s_i==s_{i-1}\),那么枚举新的字母使得\(s_i \ne s_{i-1},s_i \ne s_{i+1}\). 当\(k\gt 2\)时,则需要枚举首位是\(A\)是\(B\).在\(AAB\)这种情况下,\(k\gt…