delete pics to save space

history_source/信息学奥赛一本通/2.7.2.cpp

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+#include<iostream> 
+using namespace std;
+template<class T_fsort>
+void fsort(T_fsort *left,T_fsort *right,bool (*cmp)(T_fsort a,T_fsort b),T_fsort *k)
+{
+	if(right-left<=1) return;
+	unsigned int len=right-left;
+	fsort(left,left+len/2,cmp,k);
+	fsort(left+len/2,right,cmp,k+len/2);
+	int i=0,j=len/2,n=0;
+	while(i<len/2&&j<len)
+	{
+		if(cmp(left[i],left[j])) k[n++]=left[i++];
+		else k[n++]=left[j++];
+	}
+	while(i<len/2) k[n++]=left[i++];
+	while(j<len) k[n++]=left[j++];
+	for(int i=0;i<len;i++) left[i]=k[i];
+}
+bool cmp(int a,int b)
+{
+	return (a>=b);
+}
+int main()
+{
+	ios::sync_with_stdio(0);
+	int n,k;
+	cin>>n;
+	int num[n],f[n];
+	for(int i=0;i<n;i++) cin>>num[i];
+	fsort(num,num+n,cmp,f);
+	cin>>k;
+	for(int i=0;i<k;i++) cout<<num[i]<<'\n';
+	cout<<flush;
+	return 0;
+}