摘要：
D. Petya and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Petya has an array aa 阅读全文
摘要：
odeforces 1051 D. Bicolorings (DP) D. Bicolorings time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standa 阅读全文