UVa11059 Maximum Product （Two Pointers）

 1 #include <iostream>
 2 #include <algorithm>
 3 using namespace std;
 4 
 5 typedef long long LL;
 6 
 7 int n, a[20];
 8 
 9 LL gao() {
10     LL ans = 0;
11     for (int L = 0; L < n; L++) {
12         LL res = 1;
13         for (int R = L; R < n; R++) {
14                 res *= a[R];
15                 ans = max(ans, res);
16         }
17     }
18     return ans;
19 }
20 
21 int main() {
22     int kase = 0;
23     while (cin >> n) {
24         for (int i = 0; i < n; i++) cin >> a[i];
25         printf("Case #%d: The maximum product is %lld.\n\n", ++kase, gao());
26     }
27     return 0;
28 }