Codeforces 221 B. Little Elephant and Numbers
2 seconds
256 megabytes
standard input
standard output
The Little Elephant loves numbers.
He has a positive integer x. The Little Elephant wants to find the number of positive integers d, such that d is the divisor of x, and x andd have at least one common (the same) digit in their decimal representations.
Help the Little Elephant to find the described number.
A single line contains a single integer x (1 ≤ x ≤ 109).
In a single line print an integer — the answer to the problem.
1
1
10
2 题意:输出是x的因子且与x有相同数字的因子个数
#include<cstdio>
#include<cmath>
using namespace std;
int x,ans;
bool v[];
int main()
{
scanf("%d",&x);
int n=sqrt(x),m=x;
while(x) { v[x%]=true; x/=; }
int k,j,i;
for(k=;k<=n;k++)
if(m%k==)
{
j=m/k;i=k;
while(i)
{
if(v[i%])
{
ans++; break;
}
i/=;
}
if(j==k) continue;
while(j)
{
if(v[j%])
{
ans++; break;
}
j/=;
}
}
printf("%d",ans);
}
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