题解里面的才是真牛逼，比这厉害多了
by Ebola @ 2018-01-03 16:22:54
@[arfa](/space/show?uid=77760) 其实rand有一个稳妥算法能保证AC的，附上AC代码原理自己理解吧
```cpp
#include <bits/stdc++.h>
using namespace std;
#define ll long long
ll a, b, res;
int main()
{
srand(time(0)+817);
cin >>a >> b;
while(1)
{
if(res==a+b)
break;
else if(a + b <=0 && res > a + b)
res-=rand()%1000000;
else if(a + b <= 0 && res < a + b)
res+=rand()%1000000;
else if(a + b >= 0 && res > a + b)
res-=rand()%1000000;
else if(a + b >= 0 && res < a + b)
res+=rand()%1000000;
}
cout << res << endl;
return 0;
}
```
当然如果你~~**运气太差**~~太欧了（因为这种概率非常之低）也可能出现因为rand转太久而TLE的情况
by 权御天下 @ 2018-01-07 15:50:09
这道题有
# 100
种算法
by Unknown_Error @ 2018-02-13 21:45:34
UKE 楼下+考谷
by 精神小伙！ @ 2022-04-05 21:04:13