题解 | 提取不重复的整数
#include <iostream>
using namespace std;
int main() {
int n,f;
int fo[10]={0,0,0,0,0,0,0,0,0,0};
cin>>n;
while(n)
{
f=n%10;
n=n/10;
if(fo[f]==0)
{
cout<<f;
}
fo[f]=1;
}
}
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