error[E0432]: unresolved import `proconio`
 --> /in/foo.rs:1:5
  |
1 | use proconio::input;
  |     ^^^^^^^^ Maybe a missing `extern crate proconio;`?

error: cannot find macro `input!` in this scope
 --> /in/foo.rs:3:5
  |
3 |     input!{
  |     ^^^^^

error[E0425]: cannot find value `n` in this scope
 --> /in/foo.rs:7:20
  |
7 |     println!("{}", n + m);
  |                    ^ not found in this scope

error[E0425]: cannot find value `m` in this scope
 --> /in/foo.rs:7:24
  |
7 |     println!("{}", n + m);
  |                        ^ not found in this scope

error: aborting due to 4 previous errors