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题目链接:http://codeforces.com/problemset/problem/93/B B. End of Exams time limit per test 1 second time limit per test memory limit per test 256 megabyte 阅读全文
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恢复内容开始 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2962 Trucking Time Limit: 20000/10000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) 阅读全文
摘要:
Petya loves lucky numbers. Everybody knows that positive integers are lucky if their decimal representation doesn't contain digits other than 4 and 7. 阅读全文