Time Exceeded
foo.cc: In function 'int main()': foo.cc:31:35: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<fixed<<setprecision(10)<<(n-k)*(m-k)*k/2*1.0<<endl; ~~^~~
[Hydro](https://hydro.ac)提供评测服务
foo.cc: In function 'int main()': foo.cc:31:35: warning: 'k' may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<fixed<<setprecision(10)<<(n-k)*(m-k)*k/2*1.0<<endl; ~~^~~
[Hydro](https://hydro.ac)提供评测服务