Backpacking

input/code.c: In function 'main':
input/code.c:8:16: warning: passing argument 1 of 'printf' makes pointer from integer without a cast [-Wint-conversion]
    8 |         printf(o);
      |                ^
      |                |
      |                int
In file included from /usr/include/stdio.h:980,
                 from input/code.c:1:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:84:32: note: expected 'const char * restrict' but argument is of type 'int'
   84 | printf (const char *__restrict __fmt, ...)
      |         ~~~~~~~~~~~~~~~~~~~~~~~^~~~~
input/code.c:8:9: warning: format not a string literal and no format arguments [-Wformat-security]
    8 |         printf(o);
      |         ^~~~~~

#include <stdio.h>

int main(void)
{
    int a,b,o;
    if (scanf("%d %d", &a, &b) == 2) {
        o = a+b;
        printf(o);
    }
}

Test 1

Verdict: RUNTIME ERROR

Test 2

Verdict: RUNTIME ERROR

Test 3

Verdict: RUNTIME ERROR

Test 4

Verdict: RUNTIME ERROR