@[GeneralProgrammerVic](/user/482138) 比如 $n=10^9$，它就挂了。
by 035966_L3 @ 2022-06-29 17:05:07
@[GeneralProgrammerVic](/user/482138)
试试这个？
```cpp
/*[Line 6]*/ int n, uprlmt = 1e9 + 1, lwrlmt = 0, curr;
```
by 035966_L3 @ 2022-06-29 17:08:13
@[GeneralProgrammerVic](/user/482138) ？？？？？
by 蒟酱 @ 2022-06-29 17:08:28
@[GeneralProgrammerVic](/user/482138) 果然，直接输出 $10^9$ 能让最后一个点 AC。
by 035966_L3 @ 2022-06-29 17:09:49
@[蒟酱](/user/310818) ?
by ProgrammerVic @ 2022-06-29 17:13:54
@[035966_L3](/user/365654) 哦！！！！！！
by ProgrammerVic @ 2022-06-29 17:14:59
@[035966_L3](/user/365654)
```cpp
#include <iostream>
using namespace std;
int main() {
int n, uprlmt = 1e9, lwrlmt = 1, curr;
while (true) {
curr = (uprlmt + lwrlmt) / 2;
cout << curr << endl;
cin >> n;
if (curr == uprlmt - 1 and n == -1) {
cout << uprlmt;
return 0;
}
if (n == 0) {
return 0;
}
(n == -1 ? lwrlmt : uprlmt) = curr;
}
}
```
这样就行了！！！我把-1写成1了！！！！！！
by ProgrammerVic @ 2022-06-29 17:15:30
！！！！！！？？？？？？
by 035966_L3 @ 2022-06-29 17:18:16
+1
by duck_catch_fishs @ 2022-10-06 14:57:18
@[GeneralProgrammerVic](/user/482138) 我是这样写的：
```c++
#include <bits/stdc++.h>
using namespace std;
int main() {
int left=1,right=1e9+1;
int res;
while (true) {
cout<<(left+right)/2<<endl;
cin>>res;
if (res==-1) {
left=(left+right)/2;
} else if (res==1) {
right=(left+right)/2;
} else {
return 0;
}
}
return 0;
}
```
right初始化为1e9时最后一个点TLE，right为1e9+1时AC
玄学问题。。。
by Lele_Programmer @ 2023-07-14 21:38:14