llvm-ir, 230 bytes

Result

WA

Duration

484ms

Code [DL]

define i32 @main() {
  %1 = alloca i8, align 1
  call i32 @getchar(i8* %1)
  %2 = load i8, i8* %1, align 1
  %3 = sext i8 %2 to i32
  %4 = call i32 @putchar(i32 %3)
  ret i32 0
}

declare i32 @putchar(i8)
declare i32 @getchar(i8*)

stdin

19 31 31
31 03 51
10 16 07
77 79 06

stdout

stderr

/usr/bin/llc: /tmp/code.ll:4:3: error: instruction expected to be numbered '%3'
  %2 = load i8, i8* %1, align 1
  ^
gcc: error: /tmp/code.o: No such file or directory
gcc: fatal error: no input files
compilation terminated.
/bin/script: line 17: /tmp/code: not found

strace