1445: Repeat Number

1445: Repeat Number

Time Limit: 1 Sec  Memory Limit: 32 MB
Submit: 194  Solved: 54
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Description

Definition: a+b = c, if all the digits of c are same ( c is more than ten)，then we call a and b are Repeat Number. My question is How many Repeat Numbers in [x,y].

Input

There are several test cases.

Each test cases contains two integers x, y(1<=x<=y<=1,000,000) described above.

Proceed to the end of file.

Output

For each test output the number of couple of Repeat Number in one line.

Sample Input

1 10

10 12

Sample Output

5

2

HINT

If a equals b, we can call a, b are Repeat Numbers too, and a is the Repeat Numbers for itself.

Source

偷偷打个假表强行算了，没花多少时间

#include<cstdio>int main(){int a,b,i,ans,x[100]={11,22,33,44,55,66,77,88,99,111,222,333,444,555,666,777,888,999,1111,2222,3333,4444,5555,6666,7777,8888,9999,11111,22222,33333,44444,55555,66666,77777,88888,99999,111111,222222,333333,444444,555555,666666,777777,888888,999999,1111111,2222222};while(~scanf("%d%d",&a,&b)){ans=0;for(i=0;i<50;i++){if(x[i]>=a*2&&x[i]<=b*2){ans+=x[i]/2+1-((a>x[i]-b)?a:(x[i]-b));}}printf("%d\n",ans);}}