Backpacking

input/code.c: In function 'main':
input/code.c:9:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d", &a);
      |     ^~~~~~~~~~~~~~~

#include <stdio.h>

int main(){

    int a;

    int b = 0;

    scanf("%d", &a);

    printf("%d %d", a, b);

    return a + b;
}

Test 1

Verdict: RUNTIME ERROR

Test 2

Verdict: RUNTIME ERROR

Test 3

Verdict: RUNTIME ERROR

Test 4

Verdict: RUNTIME ERROR