gas.c: In function 'main':
gas.c:13:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
gas.c:15:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |   scanf("%d", &dd[i]);
      |   ^~~~~~~~~~~~~~~~~~~
gas.c:18:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   scanf("%d", &c);
      |   ^~~~~~~~~~~~~~~