foo.cc: In function 'int main()':
foo.cc:33:19: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'long long int' [-Wformat=]
   33 |         printf("%ld",f1[n + 1][m + 1]);
      |                 ~~^  ~~~~~~~~~~~~~~~~
      |                   |                 |
      |                   long int          long long int
      |                 %lld

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