/in/foo.c: In function 'main':
/in/foo.c:6:1: warning: implicit declaration of function 'scanf_s'; did you mean 'scanf'? [-Wimplicit-function-declaration]
 scanf_s("%d", &N);
 ^~~~~~~
 scanf
/tmp/ccDl6U0S.o: In function `main':
foo.c:(.text.startup+0x41): undefined reference to `scanf_s'
collect2: error: ld returned 1 exit status