#include #include using namespace std; using ll = long long; int main() { ll n; ll a[3]; ll line = 0; scanf("%lld", &n); for (int i = 0; i < n; i++) { scanf("%lld", a + i); char ch = getchar(); if (ch == '\n') { line++; } } if (line != 3) { puts("\"assert\""); return 1; } ll max1 = 0, max2 = 0; for (int i = 0; i < n; i++) { for (int j = i + 1; j < n; j++) { if (max1 < a[i] + a[j]) { max2 = max1; max1 = a[i] + a[j]; } } } cout << max2 << endl; return 0; }