fn main() {
   let n = 10;
   let L = 100;
   let mut minT: i32 = 0;
   for i in 0..n {
      minT = std::cmp::max(minT, i.min(L - i));
   }
   let mut maxT: i32 = 0;
   for i in 0..n {
      maxT = std::cmp::max(minT, std::cmp::max(i, L - i));
   }
   println!("max:{}, min: {}", minT, maxT);
}
max:9, min: 91
 
					 
