HDU 5327 Olympiad

Problem Description

[a,b] (a≤b). Please be fast to get the gold medal!

Input

T (T≤1000), indicating the number of testcases. 

For each test case, there are two numbers 
   
   a and 
   
   b, as described in the statement. It is guaranteed that 
   
   1≤a≤b≤100000.      

Output

For each testcase, print one line indicating the answer.

Sample Input

2
1 10
1 1000      

Sample Output

10
738      

简单题

#include<cstdio>
#include<cstring>
#include<cmath>
#include<vector>
#include<queue>
#include<stack>
#include<map>
#include<algorithm>
#include<string>
typedef long long ll;
using namespace std;
const ll maxn=100005;
int T,n,m,f[maxn],a[10];

int check(int x)
{
    memset(a,0,sizeof(a));
    for (int i=0;x;x/=10)
        if (a[x%10]) return 0; else a[x%10]=1;
    return 1;
}

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

int main()
{
    pre();
    scanf("%d",&T);
    while (T--)
    {
        scanf("%d%d",&n,&m);
        printf("%d\n",f[m]-f[n-1]);
    }
}      

Problem Description

[a,b] (a≤b). Please be fast to get the gold medal!      

Input

T (T≤1000), indicating the number of testcases. 

For each test case, there are two numbers 
    
    a and 
    
    b, as described in the statement. It is guaranteed that 
    
    1≤a≤b≤100000.      

Output

For each testcase, print one line indicating the answer.

Sample Input

2
1 10
1 1000      

Sample Output

10
738