テストデータの生成

#include<time.h>
#include<stdlib.h>
#include<iostream>
#include<string.h>
#include<cstdio>
using namespace  std;
double random()
{return (double)rand()/RAND_MAX;}
int random(int m)
{
	return (int)(random()*(m-1)+0.5);
}
int n,m;
void in(int &a)
{
	char ch;
	while((ch=getchar())<'0'||ch>'9');
	for(a=0;ch>='0'&&ch<='9';ch=getchar()) a=a*10+ch-'0';
}
int main()
{
	srand(time(NULL));
	int T;
	in(T);
	freopen("1.txt","w",stdout);
	printf("%d
",T);
	while(T--)
	{
	in(m),in(n);
	printf("%d
",m);
	for(int i=0;i!=m;++i)//m ，n 。

	{
		int x;
		int y;
		bool flag=false;
		if(rand()%2) flag=true;
		
			while(1)
		  {
		    x=random(n)+1;
		    y=random(n）+1;
		    if(x!=y&&x&&y) break;
		  }
		if(i%2==1&&flag) x=-x,y=-y;
		else if(i%2==1&&!flag) x=-x;
		else if(i%2==0&&flag)  y=-y;
		printf("%d %d
",x,y);
		}
	}return 0;
}