foo.cc: In function 'int main()':
foo.cc:54:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   54 |         for (int i=1;i<=16;i++)
      |         ^~~
foo.cc:61:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   61 |             putchar('\n');
      |             ^~~~~~~
foo.cc:34:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   34 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
foo.cc:36:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |         scanf("%d",&k);
      |         ~~~~~^~~~~~~~~

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