GCD nyoj 1007 (欧拉函数+欧几里得) GCD 时间限制:1000 ms | 内存限制:65535 KB 难度:3 描述 The greatest common divisor GCD(a,b) of two positive integers a and b,sometimes written (a,b),is the largest divisor common to a and b,For example,(1,2)=1,(12,18)=6.(a,b) can be…
Relatives Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11372 Accepted: 5544 Description Given n, a positive integer, how many positive integers less than n are relatively prime to n? Two integers a and b are relatively prime if ther…