delete pics to save space

history_source/挑战程序设计竞赛/2.7.1.cpp

@@ -0,0 +1,28 @@
+#include<cstdio>
+#include<algorithm>
+using namespace std;
+inline bool cmp(long long a,long long b)
+{
+	return a>b;
+}
+long long v1[805],v2[805],n,ans;
+int main()
+{
+	scanf("%lld",&n);
+	for(int i=0;i<n;i++) scanf("%lld",v1+i);
+	for(int i=0;i<n;i++) scanf("%lld",v2+i);
+	sort(v1,v1+n);
+	sort(v2,v2+n,cmp);
+	for(int i=0;i<n;i++) ans+=v1[i]*v2[i];
+//	for(int i=0;i<n;i++) printf("%lld ",v1[i]);
+//	printf("\n");
+//	for(int i=0;i<n;i++) printf("%lld ",v2[i]);
+//	printf("\n");
+	printf("%lld\n",ans);
+	return 0;
+}
+/*
+3
+1 3 -5
+-2 4 1
+*/