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Light OJ -- 1214(Large Division)

Bismillahir Rahmanir Rahim

///Author: Tanvir Ahmmad
///CSE,Islamic University,Bangladesh

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<string>
#include<cstring>
#include<sstream>
#include<cmath>
#include<cstring>
#include<vector>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<vector>
#include<iterator>
#include <functional> ///sort(arr,arr+n,greater<int>()) for decrement of array
/*every external angle sum=360 degree
  angle find using polygon hand(n) ((n-2)*180)/n*/
///Floor[Log(b)  N] + 1 = the number of digits when any number is represented in base b
using namespace std;
typedef long long ll;
typedef long long unsigned llu;

void ans(string str,llu div,int ca)
{
    int sz=str.size();
    llu num=0;
    for(int i=0; i<sz; i++)
    {
        if(str[i]=='-'continue;
        num=(num*10)+(str[i]-'0');
         num%=div;
    }
    if(num<=1) printf("Case %d: divisible\n",ca);
    else printf("Case %d: not divisible\n",ca);
}

int main()
{
    int tst;
    scanf("%d",&tst);
    for(int i=1; i<=tst; i++)
    {
        string str,str1;
        cin>>str>>str1;
        int sz=str1.size();
        llu div=0;
        for(int j=0; j<sz; j++)
        {
             if(str1[j]=='-'continue;
            div=(div*10)+(str1[j]-'0');
        }
        ans(str,div,i);
    }
    return 0;
}
///Alhamdulillah 

Problem Link: https://lightoj.com/problem/large-division

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