HDU 5186

#include <bits/stdc++.h>using namespace std;int n, b, a[205];char s[205];int main(){    while(scanf("%d%d", &n, &b) != EOF)    {        memset(a, 0, sizeof(a));        int MAX = 0;        for(int i=0; i<n; i++)        {            cin>>s;            int len = strlen(s);            MAX = max(MAX , len);            reverse(s, s + len);            for(int i=0; i<len; i++)            {                if(s[i] <= '9') a[i] += s[i] - '0';                else a[i] += s[i] - 'a' + 10;            }        }        for(int i=0; i<MAX; i++)  a[i] %= b;        int flag = 1;        for(int  i = MAX -1; i >= 0; i--)        {            if(!a[i] && flag && i)            continue;            else flag = 0;            if(a[i] <= 9) putchar(a[i] + '0');            else putchar(a[i] + 'a' -10);        }        cout<<endl;    }    return 0;}