2015年多校联合训练第四场（Olympiad）hdu5327

#include <bits/stdc++.h>
#define LL long long
using namespace std;

int a[1001005];
int n;
int f[100005];
int sum[100005];
int flag[10];

void init()
{
    for(int i = 1; i <= 100000; i++)
    {
        memset(flag,0,sizeof(flag));
        int p = 1;
        int t = i;
        while(t > 0)
        {
            if(flag[t%10])
            {
                p = 0;
                break;
            }

            flag[t%10] = 1;
            t = t/10;
        }
        if(p) f[i]++;
    }

    for(int i = 1; i <= 100000; i++)
    {
        sum[i] = sum[i-1] + (f[i] == 1);
    }
}

int main()
{
    #ifdef xxz
    //freopen("out.txt","w",stdout);
    freopen("in.txt","r",stdin);
    #endif // xxz
    int T,L,R;
    init();

    scanf("%d",&T);
    while(T--)
    {

        scanf("%d%d",&L,&R);
        printf("%d\n",sum[R] - sum[L-1]);

    }
    return 0;
}