A. GCD Table time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the…

C. GCD Table The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the greatest common divisor (GCD) of two positive integers x and y is the greatest integer that is divisor of both…

A. GCD Table time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the…

C. GCD Table Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/583/problem/C Description The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the greatest c…

4491. Primes in GCD Table Problem code: PGCD Johnny has created a table which encodes the results of some operation -- a function of two arguments. But instead of a boring multiplication table of the sort you learn by heart at prep-school, he has cre…

题目链接:http://codeforces.com/contest/583/problem/C C. GCD Table time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output The GCD table G of size n × n for an array of positive integers a of length n …

SPOJ4491. Primes in GCD Table Problem code: PGCD Johnny has created a table which encodes the results of some operation -- a function of two arguments. But instead of a boring multiplication table of the sort you learn by heart at prep-school, he has…

题目链接:http://codeforces.com/problemset/problem/582/A 网上很多题解,就不说了,直接贴代码= = 官方题解: http://codeforces.com/blog/entry/20692 #include <iostream> #include <cstdio> #include <cstdlib> #include <cstring> #include <algorithm> #include &…

转载请注明出处,谢谢http://blog.csdn.net/ACM_cxlove?viewmode=contents    by---cxlove 给定一个序列,a[1 ..k],问是否存在(i , j)使得 GCD(i , j + r - 1) = a[r]  (k>=r >=1),其中 i <= n && j + k - 1 <= m http://codeforces.com/contest/338/problem/D 首先容易知道row = lcm (a[…

主题链接:点击打开链接 特定n*m矩阵,[i,j]分值为gcd(i,j) 给定一个k长的序列,问能否匹配上 矩阵的某一行的连续k个元素 思路: 我们要求出一个解(i,j) 使得 i<=n && j<=m 此时输出 YES 对于j j % b[0] = 0 j+1 % b[1] = 0 ··· j+l % b[l] = 0 依据定理:若 a == b (mod n) => (a+c) == b+c (mod n) 所以将上式变换为 j % b[0] = 0 j % b[1]…