阿汤的疑惑 高精取余(其实就是除) / 质因数分解

Posted 2021-05-20 幽殇默

https://ac.nowcoder.com/acm/problem/15977

#include<cstdio>
#include<iostream>
#include<vector>
#include<algorithm>
#include<string>
using namespace std;
long long int div(vector<int> A,long long int b)
{
	int t=0;
	for(int i=A.size()-1;i>=0;i--)
	{
		t=t*10+A[i];
		t=t%b;
	}
	return t;
}
int main(void)
{
	int t; cin>>t;
	while(t--)
	{
		string s; long long int b; cin>>s>>b;
		vector<int> A;
		for(int i=s.size()-1;i>=0;i--) A.push_back(s[i]-'0');
		long long int res=div(A,b);
		long long int ans=0;
		for(int i=2;i<=res/i;i++)
		{
			if(res%i==0)
			{
				ans++;
				while(res%i==0) res/=i;
			}
		}
		if(res!=1&&res!=0) ans++;
		cout<<ans;
        if(t) cout<<endl;
	}
	return 0;
}