foo.c: In function 'main':
foo.c:6:17: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'long long int *' [-Wformat=]
    6 |         scanf("%d",&n);
      |                ~^  ~~
      |                 |  |
      |                 |  long long int *
      |                 int *
      |                %lld
foo.c:9:13: warning: unused variable 'a' [-Wunused-variable]
    9 |         int a=0;int b=0;int c=1;
      |             ^

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