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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. #define MAXNO 200
  5.  
  6. int mem[MAXNO][MAXNO][2];
  7.  
  8. int get(vector<int> v, int s, int e, int findMax) {
  9.     if(mem[s][e][findMax] != -1) return mem[s][e][findMax];
  10.  
  11.     if(e == s)
  12.         return mem[s][e][findMax] = v[s];
  13.     else if(e - s == 1)
  14.         return mem[s][e][findMax] = v[s] - v[e];
  15.  
  16.     int a = v[s] - get(v, s + 1, e, findMax);
  17.     int b = v[s] - v[s + 1] - get(v, s + 2, e, findMax);
  18.  
  19.     return mem[s][e][findMax] = (findMax ? max(a, b) : min(a, b));
  20. }
  21.  
  22. void reset() {
  23.     for(int j = 0; j < MAXNO; j++) {
  24.       for(int k = 0; k < MAXNO; k++) {
  25.         for(int l = 0; l < 2; l++) {
  26.           mem[j][k][l] = -1;  
  27.         }
  28.       }
  29.     }
  30. }
  31.  
  32. int main()
  33. {  
  34.     string tt;
  35.     getline(cin,tt);
  36.  
  37.     stringstream st(tt);
  38.     int t;
  39.     st >> t;
  40.  
  41.     while(t--) {
  42.         string s;
  43.         getline(cin,s);
  44.  
  45.         stringstream ss(s);
  46.  
  47.         int ii;
  48.         vector<int> v;
  49.  
  50.         while(ss >> ii) {
  51.             v.push_back(ii);
  52.         }
  53.  
  54.         if(v.size() == 1) {
  55.             cout << v[0] << endl;
  56.         } else {
  57.             int ans = INT_MIN;
  58.  
  59.             for(int i = 0; i < v.size() - 1; i++) {
  60.               reset();
  61.               int left = get(v, 0, i, 1);
  62.  
  63.               reset();
  64.               int right = get(v, i + 1, v.size() - 1, 0);
  65.  
  66.               ans = max(ans, left - right);
  67.             }
  68.  
  69.             cout << ans << endl;   
  70.         }
  71.     }
  72. }
Success #stdin #stdout 0s 15552KB
comments (?)
stdin 
2
2 5 1 8
6 2 1
stdout 
6
5
https://ideone.com/BcVjcR
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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