帮我看看C++竞赛题

Question

#include <bits/stdc++.h>
using namespace std;
int a[15],s[15];
int main()
{
    int n,q;
    cin >> n >> q;
    for(int i = 1;i <= n;i++)
    {
        int b;
        cin >> b;
    }
    for(int i = 1;i <= 9;i++)
    {
        s[i] = s[i - 1] + a[i];
    }
    for(int i = 1;i <= q;i++)
    {
        int l,r;
        cin >> l >> r;
        int maxn = -1,num = -1;
        for(int i = l;i <= r;i++)
        {
            int b = i;
            while(b > 0)
            {
                a[b % 10]++;
                if(maxn < a[b % 10])
                {
                    num = b % 10;
                    maxn = a[num];
                }
                b /= 10;
            }
        }
        memset(a,0,sizeof(a));
        cout << num << " " << maxn << endl;
    }
    return 0;
}

Answer 1

 
#include <bits/stdc++.h>
using namespace std;
int a[15],s[15];
int main()
{
    int n,q;
    cin >> n >> q;
    for(int i = 1;i <= n;i++)
    {
        int b;
        cin >> b;
    }
    for(int i = 1;i <= 9;i++)
    {
        s[i] = s[i - 1] + a[i];
    }
    for(int i = 1;i <= q;i++)
    {
        int l,r;
        cin >> l >> r;
        int maxn = -1,num = -1;
        for(int i = l;i <= r;i++)
        {
            int b = i;
            while(b > 0)
            {
                a[b % 10]++;
                if(maxn < a[b % 10])
                {
                    num = b % 10;
                    maxn = a[num];
                }
                b /= 10;
            }
        }
        memset(a,0,sizeof(a));
        cout << num << " " << maxn << endl;
    }
    return 0;
}