delete pics to save space

7.2559.cpp

@@ -0,0 +1,35 @@
+#include<cstdio>
+#include<cstring>
+#include<algorithm>
+using namespace std;
+typedef long long LL;
+const int maxn=100005;
+LL n,a[maxn],w[maxn],s[maxn],p,res;
+int main()
+{
+#ifdef local
+	freopen("pro.in","r",stdin);
+#endif
+	while(scanf("%d",&n),n!=0)
+	{
+		for(int i=1;i<=n;i++) scanf("%lld",&a[i]);
+		a[n+1]=p=res=0;
+		for(int i=1;i<=n+1;i++)
+		{
+			if(a[i]>s[p]) { s[++p]=a[i]; w[p]=1; }
+			else
+			{
+				LL wid=0;
+				while(s[p]>a[i])
+				{
+					wid+=w[p];
+					res=max(res,wid*s[p]);
+					p--;
+				}
+				s[++p]=a[i]; w[p]=wid+1;
+			}
+		}
+		printf("%lld\n",res);
+	}
+	return 0;
+}