fork download
copy 
  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. #define int              long long int
  4. #define double           long double
  5. inline int power(int a, int b) {
  6.     int x = 1;
  7.     while (b) {
  8.         if (b & 1) x *= a;
  9.         a *= a;
  10.         b >>= 1;
  11.     }
  12.     return x;
  13. }
  14.  
  15.  
  16. const int M = 1000000007;
  17. const int N = 3e5+9;
  18. const int INF = 2e9+1;
  19. const int LINF = 2000000000000000001;
  20.  
  21. //_ ***************************** START Below *******************************
  22.  
  23.  
  24.  
  25. vector<int> a;
  26.  
  27.  
  28. int consistency(int n) {
  29.  
  30. 	int s = 0, e = n-1;
  31. 	int p1 = 0, p2 = 0;
  32.  
  33. 	bool isReversed = false;
  34. 	int turn = 1; //* a's turn 
  35.  
  36. 	while(s<=e){
  37. 		int ele = -1;
  38. 		if(isReversed){
  39. 			//* Consume from end
  40. 			ele = a[e];
  41. 			e--;
  42. 		}
  43. 		else{
  44. 			//* Consume normal i.e. from s
  45. 			ele = a[s];
  46. 			s++;
  47. 		}
  48.  
  49. 		if(!(ele & 1)){
  50. 			isReversed = !isReversed;
  51. 		}
  52. 		if(turn) p1 += ele;
  53. 		else p2 += ele;
  54. 		turn ^= 1;
  55. 	}
  56.  
  57. 	return  p1 - p2;
  58.  
  59. }
  60.  
  61.  
  62.  
  63.  
  64.  
  65.  
  66.  
  67.  
  68.  
  69.  
  70.  
  71.  
  72. int practice(int n) {
  73.  
  74. 	return 0;
  75.  
  76. }
  77.  
  78.  
  79.  
  80. void solve() {
  81.  
  82.     int n;
  83.     cin >> n;
  84.  
  85.     a.resize(n);
  86.     for(int i=0; i<n; i++) cin >> a[i];
  87.  
  88.     // cout << consistency(n) << endl;
  89.  
  90.  
  91.     cout << consistency(n) << " -> " << practice(n) << endl;
  92.  
  93. }
  94.  
  95.  
  96.  
  97.  
  98.  
  99. int32_t main() {
  100.     ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
  101.  
  102.     int t = 1;
  103.     while (t--) {
  104.         solve();
  105.     }
  106.  
  107.     return 0;
  108. }
Success #stdin #stdout 0.01s 5316KB
comments (?)
stdin
copy 
4
2 1 4 3
stdout
copy 
2 -> 2
https://ideone.com/lFa8ZB
language:
C++14 (gcc 8.3)
created:
6 hours ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!