生成随机测试样例

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cstdlib>

int Rand(int x, int o)
{
    //if o set, return [1, x], else return [0, x - 1]
    if (!x) return 0;
    int tem = (int)((double)rand() / RAND_MAX * x) % x;
    return o ? tem + 1 : tem;
}

void data_gen()
{
    int kases = 10;
    printf("%d\n", kases);
    while (kases--)
    {
        int N = Rand(100, 1);//[1, 100]
        printf("%d\n", N);
        for(int i=1; i<=N; i++)
        {
            int sign = Rand(2, 0);//[0, 2)
            int x = Rand(10000, 0);
            if (sign) x = -x;
            printf("%d ", x);
        }
        printf("\n");
    }
}

int main()
{
    freopen("in.txt","w",stdout);
    data_gen();
}