Codeforces Round #257 (Div. 2) 450B - Jzzhu and Sequences Solution

 

 

Problem Link:  https://codeforces.com/problemset/problem/450/B

Solution in C++:

///La ilaha illellahu muhammadur rasulullah

///******Bismillahir-Rahmanir-Rahim******///

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh

///**********ALLAH IS ALMIGHTY************///

#include<bits/stdc++.h>

using namespace std;

int main()

{

    long long  t,x,y,n,nv,v,m=1000000007;

    cin>>x>>y>>n;

    long long a[]={x-y,x,y,y-x,-x,-y};

    v=n%6;

    nv=a[v];

    cout<<(nv%m+m)%m<<endl;

}