foo.c: In function 'main':
foo.c:58:26: warning: format '%lld' expects a matching 'long long int' argument [-Wformat=]
   58 |    if(no==1) printf("[%lld],op[0]");
      |                       ~~~^
      |                          |
      |                          long long int
foo.c:19:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   19 |   scanf(" %s",s);
      |   ^~~~~~~~~~~~~~

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