c-gcc, 26 bytes

Result

WA

Duration

546ms

Code [DL]

main(){printf("Hello\n");}

stdin

33 43 77
01 81 87
98 80 86
31 42 66

stdout

Hello

stderr

/tmp/code.c:1:1: warning: return type defaults to 'int' [-Wimplicit-int]
 main(){printf("Hello\n");}
 ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:8: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
 main(){printf("Hello\n");}
        ^~~~~~
/tmp/code.c:1:8: warning: incompatible implicit declaration of built-in function 'printf'
/tmp/code.c:1:8: note: include '<stdio.h>' or provide a declaration of 'printf'

strace