题目大意:排序原题链接
#include<cstdio>
#include<iostream>
using namespace std;
typedef unsigned int ll;
ll a(int n,int m)
{
ll s=1;
for(int i=n-m+1;i<=n;i++)
s*=i;
return s;
}
int main()
{
int t;
scanf("%d",&t);
while(t--)
{
int n,m;
char ch;
ll ans;
getchar();
scanf("%c",&ch);//注意字符的输入规则
getchar();
scanf("%d%d",&n,&m);
if(n<m)
{
......
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