foo.cc: In function 'int main()':
foo.cc:28:12: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   28 |   printf("%d\n", c[l]);
      |           ~^     ~~~~
      |            |        |
      |            int      long long int
      |           %lld

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