链接:https://ac.nowcoder.com/acm/contest/338/A来源:牛客网 题目描述 AFei is a trainee magician who likes to study various magical materials. Today, he came to the forest to find rare materials. He was so lucky that he found a piece of high-level magic stone. He…
Little Elephant loves magic squares very much. A magic square is a 3 × 3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table are equal. The figure below shows the magic square,…
链接:https://ac.nowcoder.com/acm/contest/338/F来源:牛客网 题目描述 AFei loves numbers. He defines the natural number containing "520" as the AFei number, such as 1234520, 8752012 and 5201314. Now he wants to know how many AFei numbers are not greater than…
Little Elephant loves magic squares very much. A magic square is a 3 × 3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table are equal. The figure below shows the magic squar…
有生以来第一场在COGS以外的地方打的比赛.挂成dog了. 主要是没有经验,加之代码能力过弱.还有最后的瞎hack三次,Too Young Too Simple...... 言归正传. (抄一发题解先) T1 Kblack loves flag 用两个布尔数组分别维护每个行/列是否被插过旗帜,最后枚举每一行.列统计答案即可.空间复杂度O(n+m),时间复杂度O(n+m+k). T2 dingyeye loves stone 设根节点的深度为0,将所有深度为奇数的节点的石子数目xor起来,则先手必…
Little Elephant and Magic Square CodeForces - 259B Little Elephant loves magic squares very much. A magic square is a 3 × 3 table, each cell contains some positive integer. At that the sums of integers in all rows, columns and diagonals of the table…
F. Heroes of Making Magic III time limit per test:3 seconds memory limit per test:256 megabytes input:standard input output:standard output I’m strolling on sunshine, yeah-ah! And doesn’t it feel good! Well, it certainly feels good for our Heroes of…
ZCC loves cards Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2362 Accepted Submission(s): 590 Problem Description ZCC loves playing cards. He has n magical cards and each has a number on it. He…
ZCC loves cards Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 260 Accepted Submission(s): 7 Problem Description ZCC loves playing cards. He has n magical cards and each has a number on it.…
