For this Question: Tono has two integer intervals [A, B] and [C, D] (the intervals are inclusive of both numbers). She wonders if Solo will be able to solve the following simple problem:
Choose an integer X from first interval and an integer Y from second interval. Now for all combinations of X and Y, what is the maximum value of X*Y.

As Solo is small, please help her solve the problem.The first and the only line of input contains 4 integers A, B, C, and D.

Constraints
-10<sup>9</sup> <= A <= B <= 10<sup>9</sup>
-10<sup>9</sup> <= C <= D <= 10<sup>9</sup>Output a single integer, the maximum value of the product.Sample Input
1 2 1 1

Sample Output
2

Explanation: Choose 2 from [1, 2] and 1 from [1, 1].

Sample Input
3 5 -4 -2

Sample Output
-6

Sample Input
-1000000000 0 -1000000000 0

Sample Output
1000000000000000000, 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, b, c, d; cin>>a>>b>>c>>d;
    int a1 = max(a*c, b*d);
    int a2 = max(a*d, b*c);
    cout<<max(a1, a2);
}   


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?