ACM题目（老师用228B解决了，无语！！！）（求c或c++解决）

Question

Answer 1

\ #include"stdio.h"
\#include"iostream"
using namespace std;

int split(int val)
{
    int sum = 0;
    while(val>0)
    {
        if(val%10==2)
            sum++;
        val/=10;
    }
    return sum;
}
int count(int l,int r)
{
    int count = 0;
    for(int i=l;i<=r;i++){
        count += split(i);
    }
    return count;
}

int main()
{
    int a;
    int b;
    cin>>a>>b;
    cout<<count(a,b);
}