HDU 5327 Olympiad

题目地址：​​点击打开链接​​

思路：打表就行

AC代码：

#include <iostream>
#include<cstring>

using namespace std;

int judge[100010];
int main()
{
    int a[11];
    int t,m,n,i,l,sum,k;
    memset(judge,0,sizeof(judge));
    for(i=1; i<=100000; i++)
    {
        memset(a,0,sizeof(a));
        k = i;
        while(k)
        {
            l = k % 10;
            if(!a[l])
            {
                a[l] = 1;
            }
            else
                break;
            k /= 10;
        }
        if(k == 0)
            judge[i] = 1;

    }
    cin>>t;
    while(t--)
    {
        sum = 0;
        cin>>m>>n;
        for(i=m; i<=n; i++)
        {
            sum += judge[i];
        }
        cout<<sum<<endl;
    }
    return 0;
}