不用前缀+二分也行
by xu405031 @ 2024-03-23 18:26:18
```
#include<iostream>
using namespace std;
int main(){
int l=0,y;
cin>>y;
for(int i=2;i<y;i++){
int u=i;
while(l<y){
l+=u;
u++;
}if(l==y)cout<<i<<" "<<u-1<<endl;
l=0;
}
}
```
by xu405031 @ 2024-03-23 18:27:00