For this Question: Given an integer A, find the value of A + A<sup>2</sup> + A<sup>3</sup> +. . .+ A<sup>1000</sup>. As the answer can be large, output answer modulo 10<sup>9</sup>+7.The first and the only line of input contains a single integer A.

Constraints
1 <= A <= 10<sup>9</sup>Output a single integer, value of sum modulo 10<sup>9</sup>+7.Sample Input
1

Sample Output
1000

Explanation: 1 + 1<sup>2</sup> + 1<sup>3</sup> +. . + 1<sup>1000</sup> = 1000

Sample Input
157

Sample Output
731862470
, I have written this Solution Code: #include <bits/stdc++.h>
using namespace std;
#define sd(x) scanf("%d", &x)
#define sz(v) (int) v.size()
#define pr(v) For(i, 0, sz(v)) {cout<<v[i]<<" ";} cout<<endl;
#define slld(x) scanf("%lld", &x)
#define all(x) x.begin(), x.end()
#define For(i, st, en) for(int i=st; i<en; i++)
#define tr(x) for(auto it=x.begin(); it!=x.end(); it++)
#define fast std::ios::sync_with_stdio(false);cin.tie(NULL);
#define pb push_back
#define ll long long
#define ld long double
#define int long long
#define double long double
#define mp make_pair
#define F first
#define S second
typedef pair<int, int> pii;
typedef vector<int> vi;
#define pi 3.141592653589793238
const int MOD = 1e9+7;
const int INF = 1LL<<60;


const int N = 2e5+5;

// it's swapnil07 ;)
 
#ifdef SWAPNIL07
#define trace(...) __f(#__VA_ARGS__, __VA_ARGS__)
template <typename Arg1>
void __f(const char* name, Arg1&& arg1){
    cout << name << " : " << arg1 << endl;
}
template <typename Arg1, typename... Args>
void __f(const char* names, Arg1&& arg1, Args&&... args){
    const char* comma = strchr(names + 1, ',');cout.write(names, comma - names) << " : " << arg1<<" | ";__f(comma+1, args...);
}
int begtime = clock();
#define end_routine() cout << "\n\nTime elapsed: " << (clock() - begtime)*1000/CLOCKS_PER_SEC << " ms\n\n";
#else
#define endl '\n'
#define trace(...)
#define end_routine()
#endif


void solve(){
    int a; cin>>a;
    int cur = 1;
    int ans = 0;
    For(i, 1, 1001){
        cur *= a;
        cur %= MOD;
        ans += cur;
        ans %= MOD;
    }
    cout<<ans;
}


signed main()
{
    fast
    #ifdef SWAPNIL07
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif
    int t=1; 
    // cin>>t;
    while(t--){
        solve();
        cout<<"\n";
    }
    return 0;
}

, In this Programming Language: C++, Now tell me if this Code is compilable or not?