foo.cc: In function 'int main()':
foo.cc:27:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   27 |     if(j==n-1)
      |       ^
foo.cc:40:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wdangling-else]
   40 |     if(j==n-1)
      |       ^

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