HackerRank# Bricks Game

 1 #include <cmath>
 2 #include <cstdio>
 3 #include <vector>
 4 #include <iostream>
 5 #include <algorithm>
 6 #include <cstring>
 7 using namespace std;
 8 
 9 #define MAX_N 100008
10 
11 int T, N;
12 long long score[MAX_N];
13 long long sum[MAX_N];
14 long long best[MAX_N];
15 
16 int main() {
17     /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
18     cin >> T;
19     while (T--) {
20         cin >> N;
21         memset(sum, 0, sizeof(sum));
22         memset(best, 0, sizeof(best));
23         for (int i = 1; i <= N; i++)
24             cin >> score[i];
25         for (int i = N; i >= 1; i--)
26             sum[i] = score[i] + sum[i + 1];
27         best[N] = sum[N];
28         best[N - 1] = sum[N - 1];
29         best[N - 2] = sum[N - 2];
30         for (int i = N - 3; i >= 1; i--)
31             for (int j = 1; j <= 3; j++)
32                 best[i] = max(best[i], sum[i] - best[i + j]);
33         cout << best[1] << endl;
34     }
35     return 0;
36 }