foo.cc: In function 'int main()':
foo.cc:5:14: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
 scanf("%d",&n);
            ~~^
foo.cc:7:15: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
 printf("%d",An);
               ^
foo.cc:5:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d",&n);
 ~~~~~^~~~~~~~~

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