DeaL0124

摘要： Petr has just bought a new car. He's just arrived at the most known Petersburg's petrol station to refuel it when he suddenly discovered that the petr 阅读全文

摘要： Kuriyama Mirai has killed many monsters and got many (namely n) stones. She numbers the stones from 1 to n. The cost of the i-th stone is vi. Kuriyama 阅读全文

摘要： Recently, Norge found a string s=s1s2…sns=s1s2…sn consisting of nn lowercase Latin letters. As an exercise to improve his typing speed, he decided to 阅读全文