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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int n, ret = -987654321;
  4. string s;
  5. vector<int> nums;
  6. vector<char> operators;
  7.  
  8. int oper(char op, int a, int b){
  9.     if(op == '+') return a + b;
  10.     if(op == '-') return a - b;
  11.     if(op == '*') return a * b;
  12. }
  13.  
  14. void go(int here, int num){
  15.     if(here == nums.size() - 1){
  16.         ret = max(ret, num);
  17.         return;
  18.     }
  19.  
  20.     go(here + 1, oper(operators[here], num, nums[here + 1]));
  21.  
  22.     if(here + 2 < nums.size()){
  23.         int temp = oper(operators[here + 1], nums[here + 1], nums[here + 2]);
  24.         go(here + 2, oper(operators[here], nums[here], temp));
  25.     }
  26.     return;
  27. }
  28.  
  29. int main(){
  30.     cin >> n >> s;
  31.     for(int i = 0; i < n; i++){
  32.         if(i % 2 == 0) nums.push_back(s[i] - '0');
  33.         else operators.push_back(s[i]);
  34.     }
  35.  
  36.     go(0, nums[0]);
  37.     cout << ret << '\n';
  38. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin
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19
1*2+3*4*5-6*7*8*9*9
stdout
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426384
https://ideone.com/OscFux
language:
C++ (gcc 8.3)
created:
4 days ago
visibility:
public

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