計算數列

添加鏈接描述

#include <bits/stdc++.h>
using namespace std;
#define int long long
int n,x,ans,s;
const int mod = 998244353;
signed main()
{
    while(cin >> n)
    {
        ans=0,s=0;
        for(int i=0;i<n;i++)
        {
            cin >> x;
            int weishu=1;
            s=0;
            while(x)
            {
                int a=x%10;
                x/=10;
                s+=(((((a*11)%mod)*n)%mod) *weishu)%mod;
                weishu=(weishu*100)%mod;
            }
            ans=(ans+s)%mod;
        }
        cout << ans << endl;
    }
    return 0;
}