使用此代码时：
for(int i=0; i<line; i++) {
next_permutation(nums, nums+N);
if(DEBUG) {
for(int j=0; j<N; j++) {
cout << nums[j] << " ";
}
}
}
我得到以下输出：-1076591092_1_2_4_3_-1076591092 _1_3_2_4_
Int his case, line would be 3, and N is 5; Thanks!
该问题与内存管理不善有关。
[-1076591092，1，3，2，4]根据定义。
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