Codeforces 749E Gosha is hunting 二分+DP Codeforces 666E Forensic Examination SAM+权值线段树 Codeforces 576D Flights for Regular Customers 矩阵快速幂+DP BZOJ4675: 点对游戏 DP Codeforces 994F Compute Power 二分+DP