Language: C

use std::io::*;
use std::str::FromStr;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("Failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();

    token.parse().ok().expect("failed to parse token")
}


fn main () {
    let N: u32 = read();
    let S: String = read();
    let chars: Vec<_> = S.chars().collect();
    let mut ans = 0;
    for i in 0..N {
        for j in 0.. N {
            for k in 0..N {
                if k > j && j > i {
                    if chars[i as usize] !=chars[j as usize] && chars[i as usize] != chars[k as usize] && chars[j as usize] != chars[k as usize] {
                        if j - i != k - j {
                            ans += 1;
                        }
                    }
                }
            }
        }
    }
    println!("{}", ans);
}

Compiler output:
main.c:1:1: error: unknown type name 'use'
    1 | use std::io::*;
      | ^~~
main.c:1:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '::' token
    1 | use std::io::*;
      |        ^~
main.c:2:1: error: unknown type name 'use'
    2 | use std::str::FromStr;
      | ^~~
main.c:2:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '::' token
    2 | use std::str::FromStr;
      |        ^~
main.c:4:1: error: unknown type name 'fn'
    4 | fn read<T: FromStr>() -> T {
      | ^~
main.c:4:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
    4 | fn read<T: FromStr>() -> T {
      |        ^
main.c:18:1: error: unknown type name 'fn'
   18 | fn main () {
      | ^~
main.c: In function 'main':
main.c:19:5: error: unknown type name 'let'
   19 |     let N: u32 = read();
      |     ^~~
main.c:19:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
   19 |     let N: u32 = read();
      |          ^
main.c:20:5: error: unknown type name 'let'
   20 |     let S: String = read();
      |     ^~~
main.c:20:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
   20 |     let S: String = read();
      |          ^
main.c:21:5: error: unknown type name 'let'
   21 |     let chars: Vec<_> = S.chars().collect();
      |     ^~~
main.c:21:14: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
   21 |     let chars: Vec<_> = S.chars().collect();
      |              ^
main.c:22:5: error: unknown type name 'let'
   22 |     let mut ans = 0;
      |     ^~~
main.c:22:13: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'ans'
   22 |     let mut ans = 0;
      |             ^~~
main.c:23:9: error: expected '(' before 'i'
   23 |     for i in 0..N {
      |         ^
      |         (
main.c:23:9: error: 'i' undeclared (first use in this function)
main.c:23:9: note: each undeclared identifier is reported only once for each function it appears in
main.c:23:14: error: too many decimal points in number
   23 |     for i in 0..N {
      |              ^~~~
main.c:24:18: error: too many decimal points in number
   24 |         for j in 0.. N {
      |                  ^~~
main.c:25:22: error: too many decimal points in number
   25 |             for k in 0..N {
      |                      ^~~~