delete pics to save space

history_source/挑战程序设计竞赛/2.2.4.2.cpp

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+#include<cstdio>
+#include<vector>
+struct heap
+{
+	int SIZE;
+	std::vector<int> v;
+	heap()
+	{
+		SIZE=0;
+	}
+	int push(int vv)
+	{
+		static int p,i;
+		i=SIZE++;
+		if(i>=v.size()) v.push_back(int());
+		while(i>0)
+		{
+			p=(i-1)/2;
+			if(v[p]<=vv) break;
+			v[i]=v[p];
+			i=p;
+		}
+		v[i]=vv;
+		return vv;
+	}
+	int top()
+	{
+		if(SIZE>0) return v[0];
+		return int();
+	}
+	int pop()
+	{
+		static int i,a,b;
+		static int x,ret;
+		ret=v[0];
+		x=v[--SIZE];
+		i=0;
+		while(i*2+1<SIZE)
+		{
+			a=i*2+1,b=i*2+2;
+			if(b<SIZE&&v[b]<v[a]) a=b;
+			if(v[a]>=x) break;
+			v[i]=v[a];
+			i=a;
+		}
+		v[i]=x;
+		return ret;
+	}
+	inline int size()
+	{
+		return SIZE;
+	}
+};
+heap hp;
+void solve()
+{
+	long long a,b,ans=0;
+	while(hp.size()>1)
+	{
+		a=hp.top();
+		hp.pop();
+		b=hp.top();
+		hp.pop();
+		ans+=a+b;
+		hp.push(a+b);
+	}
+	printf("%lld\n",ans);
+}
+void init()
+{
+	int n,t;
+	scanf("%d",&n);
+	for(int i=0;i<n;i++)
+	{
+		scanf("%d",&t);
+		hp.push(t);
+	}
+}
+int main()
+{
+	init();
+	solve();
+	return 0;
+}