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#include <iostream> #include <vector> using namespace std; int main(){ int n, b, s1 = 0, s2 = 0, max = 0, i = 0;; cin >> n; vector<int> a; for (int i = 0; i < n; ++i) { cin >> b; a.push_back(b); } while (a.size()) { if (a[0] < a[a.size() - 1]) { max = a[a.size() - 1]; a.pop_back(); } else { max = a[0]; a.erase(a.begin()); } if (i % 2 == 0) s1 += max; else s2 += max; ++i; } cout << s1 << ":" << s2; return 0; }
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