Light OJ 1214

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
string Num;
vector<ll> Big;

ll MOD(vector<ll> Big, ll m)
{
ll ret = 0;
for(int i = 0; i < Big.size(); ++i)
{
ret = ret * 10 + Big[i];
ret = ret % m;
}
return ret;
}

int main()
{
ll t, n;
scanf("%lld",&t);
for(int kase = 1; kase <= t; ++kase)
{
cin >> Num >> n;
Big.clear();
for(int i = 0; i < Num.length(); ++i)
{
if(Num[i] >= '0' && Num[i] <= '9')
Big.push_back(Num[i] - '0');
}
if(n < 0) n = -n;
int ans = MOD(Big, n);
printf("Case %d: %s\n",kase, ans == 0 ? "divisible" : "not divisible");
}
}