#include <map>
#include <array>
#include <string>
#include <numeric> // accumulate
using namespace std;
double oc(char c, double d1, double d2) {
  switch (c) {
      case '+': return d1+d2; break;
      case '-': return d1-d2; break;
      case '/': return d1/d2; break;
      case '*': return d1*d2; break;
      default: return 0.0;
  }
//  return 0.0;
}

double calculate(const array<int, 5>& nums, const string& ops) {
    return accumulate(next(nums.begin()),nums.end(),nums[0],
                          [&,i=0](auto acc,auto d) mutable {
                              return oc(ops[i++],acc,d); });
}

pair<string, string> MinMaxEquations(const array<int, 5>& numbers) {
    map<double,string> results; // double first: insertion is sorted
    string ops = "+-*/";
//  No need to sort here ?
    do {
        results[calculate(numbers, ops)]=ops;
    } while (next_permutation(ops.begin(), ops.end()));
    return {results.begin()->second,results.rbegin()->second};
}